DVD-Ag电极阳极溶出伏安法测定枸杞子中铅和镉残留  

Determination of copper and cadmium in Fructus Lycii by anodic stripping voltammetry using DVD-Ag electrode

作　　者：刘蕊 刘涛 崔闻宇[2] 孙言春[3] LIU Rui;LIU Tao;CUI Wen-yu;SUN Yan-chun(Pharmaceutical Engineering Technology Research Center,Harbin University of Commerce,Harbin 150076,China;School of Pharmacy,Harbin University of Commerce,Harbin 150076,China;Heilongjiang River FisheriesResearch Institute of Chinese Academy of Fishery Sciences,Harbin 150070,China)

机构地区：[1]哈尔滨商业大学药物工程技术研究中心,黑龙江哈尔滨150076 [2]哈尔滨商业大学药学院,黑龙江哈尔滨150076 [3]中国水产科学研究院黑龙江水产研究所,黑龙江哈尔滨150070

出　　处：《应用化工》2020年第3期792-795,共4页Applied Chemical Industry

基　　金：国家自然科学基金(31370764);中国水产科学研究院基本科研业务费资助(2016HY-ZD1205);哈尔滨商业大学青年创新人才培养计划(18XN048,18XN027);哈尔滨商业大学博士科研启动理科项目(13DL022);哈尔滨青年创新人才计划项目(RC2017QN017002);黑龙江省普通高等院校青年创新人才计划(UNPYSCT-2018132)。

摘　　要：建立了利用DVD-Ag电极阳极溶出伏安法同时快速测定铅和镉的方法,并考察了I-对电极上的铅和镉溶出分析的影响。利用该方法测定了枸杞子中铅和镉的残留含量。结果表明,优化实验条件下,在5~50μg/L浓度范围内,Pb^2+和Cd^2+的溶出峰电流与Pb^2+和Cd^2+的浓度呈线性相关,相关系数分别为0.9923和0.9953,Pb^2+和Cd^2+的检出限分别为0.2μg/L和2.6μg/L(S/N=3)。对该方法进行了方法学考察,包括精密度、稳定性和回收率,结果均符合相关要求。枸杞子中Pb^2+和Cd^2+的残留含量测定结果与经典的电感耦合等离子体质谱法(ICP-MS)一致性较好,表明该方法可用于枸杞子中铅和镉的残留量的检测。The use of a digital versatile disc(DVD)-Ag electrode for the square-wave anodic stripping voltammetric determination of Pb^2+and Cd^2+was described.The effect of I-on the stripping analysis of Pb^2+and Cd^2+at DVD-Ag electrodes was also studied.Residual of lead and cadmium in Fructus Lycii was determined by this method.The result showed that under the optimal test conditions,the anodic stripping voltammetry peak current was in proportional to Pb^2+and Cd^2+concentration at 5~50μg/L,r=0.9923 and r=0.9953.And the limits of detection(S/N=3)are estimated to be 0.2μg/L and 2.6μg/L for Pb^2+and Cd^2+,respectively.The precision,stability and recovery test showed well results.The method can be used for the determination of lead and cadmium in Fructus Lycii,as there was no significant difference(P>0.05)between the results from anodic stripping voltammetry and inductively coupled plasma mass spectrometry.

关 键 词：阳极溶出伏安法 枸杞子 铅 镉 DVD-Ag电极 

分 类 号：TQ460.72[医药卫生—药物分析学] O657.1[化学工程—制药化工]