摘要
采用电化学氢化物发生与原子荧光联用技术,同时测定了样品中的As和Sb含量。对各种实验参数和干扰情况进行了详细研究。As在0～500μg/L,Sb在0～300μg/L之间均有良好的线性关系;相对标准偏差(RSD)(10μg/L,n=11)分别是3.7%和1.8%;检出限分别为0.14μg/L和0.20μg/L。
A new method for simultaneous determination of As and Sb by electrochemical hydride generation (Ec-HG) with atomic fluorescence spectrometry (AFS) was developed. The thin-layer electrolytic cell was used for hydride generation. Platinum was used as anode and Ph as cathode. When electrolysis began, hydride-forming elements such as As and Sb were reduced to gaseous hydrides on cathode surface and were transported to gas liquid separator by carrying gas for AFS measurements. The detection limits (3 sigma) of As( III ) and Sb ( II ) in aqueous solution were 0.14 mu g/L and 0.20 mu g/L, respectively, with precisions (RSD, n = 11) of 3.7% and 1.8%. The technique has been applied to the determination of As and Sb in tobacco sample. The interferences of some ions have been studied.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期687-689,共3页
Chinese Journal of Analytical Chemistry
基金
国家烟草专卖局资助项目(No.110200302029)
