noon 2009/02/19
Iprodione ESI + 330>101 330>143 330>245 ESI - 228>141 Fomesafen ESI + 456>344 456>223 ESI - 437>195 437>286 试一下这个。
我在故我思 2009/02/28
楼主，你好！您可以先用版友[B]noon[/B]给的正负离子测定一次看看结果怎么样？
realtiger 2009/03/03
Fomesafen ESI - MRM （m/z) 437＞195 全文链接 http://www.jstage.jst.go.jp/article/shokueishi/49/3/211/_pdf/-char/ja/ 另一种 http://www.rsc.org/Publishing/Journals/AN/article.asp?doi=b312236k Paper Analyst, 2004, 129, 38 - 44, DOI: 10.1039/b312236k Liquid chromatography and tandem mass spectrometry: a powerful approach for the sensitive and rapid multiclass determination of pesticides and transformation products in water Juan V. Sancho, Oscar J. Pozo and Félix Hernández -------------------------------------------------------------------------------- In this paper we will show the results of our research on the direct simultaneous determination of multi-class pesticides and transformation products with different polarities and acid–base properties by applying an on-line trace enrichment coupled to the chromatographic system supplied with electrospray interface (SPE-LC-MS/MS method). The specific chromatographic separation allows the correct determination of almost fifty compounds (37 pesticides and 10 transformation products) using very low sample volume and very little sample handling. Recoveries between 70–120% were obtained for all compounds in drinking and groundwater, meanwhile in surface water 44 compounds were correctly quantified. Relative standard deviations lower than 15% were obtained for all compounds. Even at the lowest concentration level tested (25 ng L–1) 40 compounds presented satisfactory recoveries and repeatability. The use of methanol as organic modifier and the increase of injection volume are also studied. The applicability of the developed
realtiger
第12楼2009/03/03
Fomesafen ESI - MRM （m/z) 437＞195
全文链接
http://www.jstage.jst.go.jp/article/shokueishi/49/3/211/_pdf/-char/ja/
另一种
http://www.rsc.org/Publishing/Journals/AN/article.asp?doi=b312236k
Paper
Analyst, 2004, 129, 38 - 44, DOI: 10.1039/b312236k
Liquid chromatography and tandem mass spectrometry: a powerful approach for the sensitive and rapid multiclass determination of pesticides and transformation products in water
Juan V. Sancho, Oscar J. Pozo and Félix Hernández
--------------------------------------------------------------------------------
In this paper we will show the results of our research on the direct simultaneous determination of multi-class pesticides and transformation products with different polarities and acid–base properties by applying an on-line trace enrichment coupled to the chromatographic system supplied with electrospray interface (SPE-LC-MS/MS method). The specific chromatographic separation allows the correct determination of almost fifty compounds (37 pesticides and 10 transformation products) using very low sample volume and very little sample handling. Recoveries between 70–120% were obtained for all compounds in drinking and groundwater, meanwhile in surface water 44 compounds were correctly quantified. Relative standard deviations lower than 15% were obtained for all compounds. Even at the lowest concentration level tested (25 ng L–1) 40 compounds presented satisfactory recoveries and repeatability. The use of methanol as organic modifier and the increase of injection volume are also studied. The applicability of the developed
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