橡胶制品null检测 | 微波诱导燃烧样品处理技术测定含炭黑合成橡胶中的铝铁锰锶和锌-安东帕(上海)商贸有限公司

方案摘要

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应用领域	石油/化工
检测样本	橡胶制品
检测项目
参考标准	无

采用安东帕微波消解仪配备微波氧燃烧技术样品处理，采用ICP-OES检测，对含炭黑橡胶中国的Al, Fe, Mn, Sr 和Zn痕量元素进行检测。

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方案详情

A rapid digestion procedure for the determination of Al, Fe, Mn, Sr and Zn in carbon black-containing elastomers (30%) has been developed using sample combustion in closed quartz vessels. Microwave radiation was used for ignition. Combustion takes place in the presence of oxygen under pressure using ammonium nitrate (50 μl of 6 mol l−1) as aid for ignition. Samples of nitrile-butadiene rubber and ethylenepropylene-diene monomer were decomposed. A quartz device was used simultaneously as a sample holder and for the protection of vessel cap. The influence of the absorption solution (nitric acid or water) and the necessity of an additional reflux step were evaluated. Determination of Al, Fe, Mn, Sr and Zn was performed by inductively coupled plasma optical emission spectrometry. A reference method (ASTM D 4004-06) based on conventional dry ashing and flame atomic absorption spectrometry was used for comparison (Mn and Zn). Results were also compared to those obtained by using wet acid digestion in closed systems. Concentrated and diluted (4 mol l−1) nitric acid, with 5 min of reflux after the combustion, gave best recoveries for all analytes (from 97 to 101%). For dry ashing quantitative recoveries were found only for Zn whereas for Al, Fe, Mn and Sr the recoveries were only 14, 37, 72 and 37%, respectively. With the proposed procedure the residual carbon content was below 0.5% and further determination of analytes was feasible with only the combustion step (for Fe a reflux with diluted HNO3 was necessary). Complete sample digestion is obtained in less time using the proposed procedure than with other procedures and no concentrated acids were necessary.

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安东帕(上海)商贸有限公司

钻石会员丨第19年

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微波诱导燃烧样品处理技术测定含炭黑合成橡胶中的铝 铁 锰 锶和锌

微波诱导燃烧样品处理技术测定含炭黑合成橡胶中的铝铁锰锶和锌