三氮烯

溶解态硝酸盐的同位素分析是环境科学的一个重要应用，与目前的细菌反硝化法和叠氮化镉法相比，新型的三价钛还原法用于硝酸盐同位素分析大大降低了样品预处理的技术门槛。实验名称：硝酸盐氮氧同位素分析实验仪器：德国元素elementarenvirovisION样品预处理Altabet等人在2019年对三价钛还原法进行了详细的描述。简单地说，在制备硝酸盐样品前，用锌金属粉对三氯化钛进行预处理30分钟，以确保反应效果。在预处理之后，样品制备将每个小瓶中溶解的NO3-转化为N2O气体，用于顶空IRMS分析，这是通过用移液管加入样品，去离子水脱气，10%盐酸和处理过的钛试剂来完成的。然后轻轻搅动小瓶，放置12 - 24小时，以待反应完成。一步反应1. 用移液管将试剂和样品加入40毫升或20毫升的小瓶中2. 静置小瓶12-24小时反应(硝酸样品转化为N2O)3. 在EnvirovisION IRMS上运行样品一旦完成，样品可以在iso FLOW GHG和isoprime precisION或EnvirovisION系统的N2O分析模式下进行分析。分析速度显著提高与广泛使用的细菌反硝化法相比，钛(III)还原法大大缩短了样品制备时间，样品制备从7-9天减少到一天。以浓厚兴趣与责任为经，以奉献与专一为纬，120多年坚持做一件事 - 元素分析，德国元素Elementar正把他对科技的热诚汇入中国火热的经济发展大潮，为中国的未来，为中国的环境、材料、农业、食品医药等领域的研究发展，贡献自己的力量。

p 　　为更好地了解氨氮在线分析仪市场情况，仪器信息网特组织“氨氮在线分析仪市场”问卷调研活动，旨在给用户在使用和选购仪器的过程中做出参考。 /p p 　　继首批、第二批获奖名单公布之后，第三批获奖用户名单也已经火热出炉。本次共有64位用户成功获得此次话费奖励，快来看看有没有你! /p table border=" 1" cellspacing=" 0" cellpadding=" 0" width=" 413" align=" center" tbody tr class=" firstRow" td width=" 66" valign=" bottom" style=" border: 1px solid windowtext padding: 0px 7px " p style=" text-align:center line-height:20px text-autospace:none" strong span style=" font-size:17px font-family: DengXian color:black" 序号 /span /strong /p /td td width=" 140" valign=" bottom" style=" border-top: 1px solid windowtext border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-image: initial border-left: none padding: 0px 7px " p style=" text-align:center line-height:20px text-autospace:none" strong span style=" font-size:17px font-family: DengXian color:black" 联系电话 /span /strong /p /td td width=" 66" valign=" bottom" style=" border-top: 1px solid windowtext border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-image: initial border-left: none padding: 0px 7px " p style=" text-align:center line-height:20px text-autospace:none" strong span style=" font-size:17px font-family: DengXian color:black" 序号 /span /strong /p /td td width=" 142" valign=" bottom" style=" border-top: 1px solid windowtext border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-image: initial border-left: none padding: 0px 7px " p style=" text-align:center line-height:20px text-autospace:none" strong span style=" font-size:17px font-family: DengXian color:black" 联系电话 /span /strong /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 1 /span /p /td td width=" 140" valign=" bottom" 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1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 2 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 153****7003 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 34 /span /p /td td width=" 142" valign=" bottom" style=" 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/td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 38 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 151****6929 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif 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/tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 8 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 183****4543 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif 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,sans-serif color:black" 157****7730 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 41 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 137****4179 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" 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style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 188****7577 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 44 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****7231 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right 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span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****7322 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 14 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 156****4663 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right 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style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 139****4398 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 47 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 139****1669 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 16 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 188****8536 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 48 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 187****1189 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 17 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****5306 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 49 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 177****8951 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 18 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 152****9092 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 50 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 186****9588 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 19 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****1136 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 51 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 136****0780 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 20 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 182****6936 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 52 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 147****9800 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 21 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 139****6095 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 53 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 152****5998 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 22 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 183****6132 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 54 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 137****0914 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 23 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****7667 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 55 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 150****8050 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 24 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 136****0308 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 56 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 158****5954 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 25 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 139****5815 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 57 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 152****7106 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 26 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 147****9455 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 58 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 138****2013 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 27 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 153****9530 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 59 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 152****4252 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 28 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 187****9961 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 60 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 158****5246 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 29 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 184****8344 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 61 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 189****8675 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 30 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 135****0469 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 62 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 158****5346 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 31 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 189****7567 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 63 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 139****8721 /span /p /td /tr tr td width=" 66" valign=" bottom" style=" border-right: 1px solid windowtext border-bottom: 1px solid windowtext border-left: 1px solid windowtext border-image: initial border-top: none padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 32 /span /p /td td width=" 140" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 151****5515 /span /p /td td width=" 66" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" text-align:right line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 64 /span /p /td td width=" 142" valign=" bottom" style=" border-top: none border-left: none border-bottom: 1px solid windowtext border-right: 1px solid windowtext padding: 0px 7px " p style=" line-height:20px text-autospace:none" span style=" font-size:17px font-family:& #39 Arial& #39 ,sans-serif color:black" 156****8423 /span /p /td /tr /tbody /table

美国自然历史博物馆的Norell等人曾于2020年在Nature杂志上发表了一篇文章（The first dinosaur egg was soft，https://doi.org/10.1038/s41586-020-2412-8），用拉曼光谱和组织切片等手段，证明发现于阿根廷的鼠龙蛋（晚三叠世/早侏罗世）和发现于蒙古的原角龙蛋（晚白垩世）为软壳蛋，并用祖先状态重建得出最早的恐龙蛋为软壳蛋的结论。 最近，中国科学院古脊椎动物与古人类研究所崔胜（Seung Choi）、张蜀康等与国际团队开展合作，在Nature杂志上对上述研究的结论提出质疑(Triassic sauropodomorph eggshell might not be soft)。文章指出，Norell等人的论文存在方法使用不当的问题。首先，拉曼光谱显示鼠龙蛋壳内含有方解石，这是硬质蛋壳的主要成分。虽然原作者将其解释为石化作用的结果，但是单从拉曼光谱并不能区分出这些方解石是蛋壳原有的成分还是石化作用产生的。要解决这个问题，还需要用电子背散射衍射等其他方法分析方解石的结晶学特征和在蛋壳内的分布情况。其次，Norell等人认为在鼠龙蛋壳中出现了蛋白质石化产物的拉曼峰。然而，这些拉曼峰在发现于韩国的晚白垩世的硬质蛋壳中也有出现。它们代表的不是蛋白质的石化产物，而是蛋壳内的有机物经过热成熟作用产生的无定形碳。第三，尽管在鼠龙蛋壳的组织切片上并未见到双折射现象，但这并不代表鼠龙蛋壳不具有生物成因的方解石。这种现象也有可能是切片过厚或蛋壳内有机物过多等其他原因造成的。因此，有必要通过制作厚度合适的切片或者使用扫描电镜对鼠龙蛋壳的结构开展进一步的研究。 综上所述，崔胜等认为Norell等发表的论文在方法上存在缺陷，所以不能确定鼠龙蛋壳是否为软壳。假如鼠龙蛋壳为硬壳，通过祖先状态重建可知，最早的恐龙蛋大概率为硬壳蛋。论文链接：https://doi.org/10.1038/s41586-022-05151-9 图.如果鼠龙蛋为硬壳，最早的恐龙蛋有52%的可能性为硬壳（引自论文）