Shi Yan-zhi, Wang Ying-feng, He Run-juan, Chen Deng-yun
Center of Analysis Test, Capital Normal University, Beijing 100037, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jun;25(6):955-9.
Scme certified reference materials (CRMs) were digested and the elemental concentrations were determined by ICP-MS instrument, and the results include not only the trace key elements such as As, Pb, Hg and Cd but also the major components such as Ca, Fe, K, Na etc. The digestion method, the recoveries, and the detection limits are discussed to piove the reliability of ICP-MS and EPA200.8 method for the determination of the elements in fcxxl and plant samples. The ICP-MS instrument with ORS (octupole reaction system) was applied to the determination of As, Se etc, and the results are compared with those from the normal ICP-MS without ORS. The removal of ArCl and ArAr interference is discussed, and the advantage of ORS is proved by measuring the As and Se in some CRMs.
对一些有资质认证的标准参考物质（CRMs）进行消解，并通过电感耦合等离子体质谱仪（ICP-MS）测定其元素浓度，结果不仅包括痕量关键元素如砷（As）、铅（Pb）、汞（Hg）和镉（Cd），还包括主要成分如钙（Ca）、铁（Fe）、钾（K）、钠（Na）等。讨论了消解方法、回收率和检测限，以证明ICP-MS和EPA200.8方法用于测定食品和植物样品中元素的可靠性。将带有八极杆反应系统（ORS）的ICP-MS仪器应用于砷、硒等元素的测定，并将结果与没有ORS的普通ICP-MS的结果进行比较。讨论了氩氯（ArCl）和氩氩（ArAr）干扰的消除，并通过测定一些标准参考物质中的砷和硒证明了ORS的优势。
