摘要
采用微波消解法预处理聚乙烯(PE)、聚丙烯(PP)、聚苯乙烯(PS)和丙烯腈-丁二烯-苯乙烯共聚物(ABS)等常用塑料包装材料样品,考察了消解介质、消解温度和保持时间对消解结果的影响,优化选择了电感耦合等离子体-质谱法(ICP-MS)的测定参数和内标元素。在选定的最佳消解和测定条件下,建立了微波消解-电感耦合等离子体-质谱法测定塑料包装材料中微量砷铅镉铬汞的方法。方法测定下限介于0．06-0．10μg／g之间,加标回收率在93％-106％之间,RSD<8％。方法准确可靠,可用于实际样品分析。
A method is reported for the determination of As, Pb, Cd, Cr, Hg in polyethylene （PE）, polypropyl-ene （PP）, polystyrene （PS） and aerylonitrile-butadiene-styrene eopolymer （ABS） by ICP-MS. The sam-pies of these wrapper materials were pretreated by microwave digestion. The effects of digestion media, digestion temperature and holding time on digestion results were investigated. The working conditions and the internal standard elements for ICP-MS determination were optimized. The detection limits for 5 elements were in the range of 0.06-0. 10 μg/g, the recoveries were 93%-106%and the RSDs were less than 8%. The method is accurate, reliable and applicable in the analysis of practical samples.
出处
《分析仪器》
CAS
2007年第2期41-44,共4页
Analytical Instrumentation
