摘要
目的 建立微波消解电感耦合等离子体质谱（ICP-MS）法同时测定大花红景天中有害重金属的方法.方法 以硝酸＋过氧化氢作为消解体系,微波消解用作前处理,电感耦合等离子体质谱作为检测手段,同时测定大花红景天中铅（Pb）、砷（As）、汞（Hg）、镉（Cd）、铜（Cu）的含量.结果 Pb、As、Hg、Cd、Cu线性关系良好（r ≥0.9995）,方法检出限0.005～0.01 mg/kg,方法回收率85.5％～97.1％,RSD 0.6％～6.1％.结论 本法简便、准确、灵敏度高,重复性好,可为大花红景天的质量控制提供依据.
Objective To develop a method for the simultaneous determination of Pb,As,Hg,Cd,Cu in Rhodiola crenulata by inductively coupled plasma mass spectrometry （ICP-MS）.Methods Taking HNO3＋H2O2 as the system of digestion,microwave digestion as the pre-treatment method,the contents of Pb,As,Hg,Cd,Cu in Rhodiola crenulata were determined by ICP-MS.Results All the elements showed good linearity （r≥ 0.9995）.The detection limits of the method were 0.005-0.01 mg/kg.The average recoveries were 85.5 ％-97.1％ with RSD of 0.6 ％-6.1％.Conclusion The developed method can be convenient,accurate,sensitive and reproducible,and suitable for the quality control of Rhodiola crenulata.
出处
《食品与药品》
CAS
2014年第3期195-198,共4页
Food and Drug
关键词
大花红景天
电感耦合等离子体质谱法
重金属
Rhodiola crenulata
inductively coupled plasma mass spectrometry （ICP-MS）
heavy metal
