摘要
在乳化剂ＯＰ存在下及０．３ｍｏｌ／ＬＨＣｌ介质中，铅、铜在峰电位－０．５５Ｖ及－０．３４Ｖ（ｖｓ．ＳＣＥ）处分别有一灵敏的溶出峰。详细探讨了溶出分析的最佳条件。本方法已用于发酵酒、配制酒、蒸馏酒及饮料中铅、铜的直接测定，回收率为９０．６％～１１０％，ＲＳＤ为０．２％～８．２％，检出限为０．０２５～０．００５４μｇ／２０ｍＬ范围。
he optimum conditions for the simultaneous determination of Pb and Cu in the presence of emulsifier OP by differential potential stripping analysis (DPSA) have been studied.It was found that the sensitive stripping peak potentials of Pb and Cu were -0.55V and -0.34V( vs .SCE) respectively in a supporting electrolyte of 0.3mol/L HCl.The detection limit is 0.025～0 0054μg/20mL for Pb and Cu respectively.Its relative standard deviation is 0.2%～8 2% and the recovery is 90.6%～110%.The proposed method has been applied to the direct determination of Pb and Cu in foods.
出处
《分析试验室》
CAS
CSCD
1998年第5期45-47,共3页
Chinese Journal of Analysis Laboratory
关键词
铅
铜
OP
微分电位溶出法
食品分析
Differential potential stripping analysis
emulsifier OP
lead
copper
food
