作　　者： ; ; ; ; ;

机构地区： 湘南学院化学与生命科学系

出　　处： 《福建分析测试》 2010年第4期29-32,共4页

摘　　要： 本文采用湿法消解氢化物-原子吸收光谱法,测定不同产地土牛膝中砷、汞的含量。结果显示标样中砷、汞的浓度与吸光度呈良好的线性关系,校准曲线的线性回归方程分别为:A=0.1753C+0.72380、A=0.0637C+0.0093,相关系数R=0.9999、R=0.9993,检出限为0.0585μg·L-1、0.0094μg·L-1,相对标准偏差(n=10)为1.0%～5.0%、1.0%～5.0%,加标回收率为97%～102%、98%～101%。样品中砷、汞含量的实验结果为:北京产土牛膝:1040.1415、364.4999μg·L-1,成都产土牛膝:222.0217、211.4003μg·L-1,郴州产土牛膝:1068.0549、244.4386μg·L-1,长沙产土牛膝:1256.5094、289.0937μg·L-1。结论是本法简单易行,方便快捷,灵敏度和精密度高,选择性好,结果令人满意。 Objective：Determination of the As and Hg contents in achyranthes aspera L in different habitats. Methods： Applied flame atomic absorption spectrophotometer. Results：The concentration of As and Hg in spesimen and light absorption was good linear correlative, Regression equiation was A=0.1753C＋0.72380、A=0.0637C＋0.0093 with correlative coefficient R=0.9999、R=0.9993 and detection limit 0.0585μg·L-1、0.0094μg·L-1 respectively. The relative standard deviation（n=10） was 1.0% ～5.0% 、1.0% ～5.0% respectively. The recovery rate of standard addition was 97% ～102% 、98% ～101% respectively. The level of Cu in the Achyranthes aspera of Beijing, Chengdu, chenzhou and Changsha was 1040.1415、 364.4999μg ·kg-1, 222.0217、211.4003μg ·kg-1, 1068.0549、244.4386μg ·kg-1 and 1256.5094、289.0937μg ·kg-1 respectively. Conclution：The method was quick, simple and convenient. high sensitivivty and precision, good selectivity . The results were satisfactory.

关 键 词： 氢化物 原子吸收光谱 砷 汞 土牛膝 不同产地

领　　域： [理学] [理学]