摘要
用3种不同的样品前处理方法,即①常规湿法酸消解法、②微波加热酸消解法及③干灰化法分别对川芎样作前处理溶解,用石墨炉原子吸收光谱法(GF-AAS)测定试液中铅、铜和镉的含量,用氢化物发生-原子荧光光谱法(HG-AFS)测定试液中砷和汞的含量。结果表明:用方法①及方法③处理样品所得溶液中,铅、铜和镉的回收率在83.0%～121.0%之间,而汞和砷的回收率很低。在方法②处理样品所得溶液中,测得砷、铜、镉及汞的回收率达97.0%～127.0%之间,而铅的回收率较低,仅为51.8%。总之,方法①适合用于GF-AAS测定铅时的样品前处理,方法②宜用于HG-AFS测定汞和砷时的样品前处理,而方法③宜应用于GF-AAS测定铜及镉时的样品前处理。
The methods of①conventional wet acid-digestion,②acid-digestion assisted by microwave heating and③dryashing digestion were used individually for pretreatment of chuanxiong rhizome samples.The contents of Pb,Cu and Cd in each of the sample solutions were determined by GF-AAS,and contents by Hg and As by HG-AFS.As shown by the experimental results,values of recovery of Pb,Cu and Cd found in sample solution obtained by mtthods①and③were in the range of 83.0%to 121.0%,while the values of recovery of Hg and As found in the same solution were much lower.In analyzing sample solution,obtained by method②,higher recovery values ranged from 97.0%-127.0%were found for As,Cu,Cd and Mg,but low recovery value of 51.8%was found for Pb.On the whole,the digestion method①was suitable to be used for determination of Pb by GF-AAS, the method②was suitable for determination of Hg and As by HG-AFS,and the method③was preferred for determination of Cu and Cd by GF-AAS.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2010年第4期404-406,410,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
川产地道药材川芎中的重金属研究(2007xs505)
