湿法消解ICP-AES法测定党参中的Cd、Cr、Hg和Pb  

Determination of Cd, Cr, Hg, Pb in Codonopsis pilosula by Inductively Coupled Plasma Atomic Emission Spectrometry with Wet Digestion

作　　者：刘凯政[1] 陆益民[1] 冯光炷[1] 郑小燕[1] 罗汝橙 

机构地区：[1]仲恺农业工程学院化学化工学院,广州510225

出　　处：《食品工业》2014年第10期265-267,共3页The Food Industry

基　　金：国家自然科学基金项目(31371880);广东省大学生创新创业训练计划项目(NO1134713029)

摘　　要：建立了电感耦合等离子体原子发射光谱法（ICP-AES）测定党参中Cd、Cr、Hg和Pb的分析方法。采用硝酸-高氯酸（体积比为4∶1）消解党参,ICP-AES法测定Cd、Cr、Hg和Pb的含量,并对消解体系进行了优化,同时用光谱直读法定性分析其他元素。在最佳试验条件下,检出限为Cd 0.085 mg/kg、Cr 0.205 mg/kg、Hg 0.065 mg/kg、Pb 0.600mg/kg;回收率在97.10%～107.75%之间;相对标准偏差RSD〈5.0%。定性分析党参含有Al、B、Ba、Ca、Cd、Cr、Cu、Fe、K、Na、Mg、Mn、P、Pb、S、Si、Sr、Ti、Zn等19种元素。方法快速、简便、准确,结果令人满意。The method was established for determination of Cd, Cr, Hg and Pb in Codonopsis pilosula by inductively coupled plasma atomic emission spectrometry（ICP-AES）. When the samples were melted by HNO3-HClO4（volume ratio of 4∶1）, the content of Cd, Cr, Hg, Pb could be determined by ICP-AES and all elements could be found by spectrogram. Optimize the conditions like mixed-acid digestion system. The limited detections are Cd 0.085mg/kg, Cr 0.205 mg/kg, Hg 0.065 mg/kg, Pb 0.600 mg/kg, recoveries in the range of 97.10% to 107.75%, relative standard deviation（RSD）〈5.0%. Codonopsis pilosula contain Al, B, Ba, Ca, Cd, Cr, Cu, Fe, K, Na, Mg, Mn, P, Pb, S, Si, Sr, Ti, Zn and so on. The method is simple, fast, accurate, and the result is satisfactory.

关 键 词：ICP-AES 党参 湿法消解优化 定性定量 

分 类 号：O657.31[理学—分析化学] R284.1[理学—化学]