食品科学 ›› 2008, Vol. 29 ›› Issue (6): 361-363.
• 分析检测 • 上一篇 下一篇
王春平, 刘红云
出版日期:
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WANG Chun-Ping, LIU Hong-Yun
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摘要： 采用静态电位溶出法直接测定饮料中的铅,以HNO3为底液(pH2),玻碳电极为工作电极,测得铅的溶出电位是-0.48V,峰高与铅的浓度在0～24μg/L范围内有良好线性关系,测定精密度为0.58%～2.50%,样品加标回收率为90.0%～105.7%。该法操作简便、快速、干扰少、灵敏度高,适用于饮料等饮品中微量铅的测定。
关键词: 静态电位溶出法, 测定, 饮料, 铅
Abstract: In this study, the determination of lead in beverage was conducted by static electricanodic stripping voltammetry in a supporting electrolyte of HNO3 (pH2). The peak potential of lead appeares at 0.48 V(vs.Ag/AgCl, 3 mol/L KCl). The linear relationship between the stripping current and concentration of Pb2+ exists in the range of 0～24μg/L, the precision (%) of Pb ise 0.58%～2.50%, and the recovery rate of Pb is 90.0%～105.7%. This method is simple and rapid with few disturbances and high sesitivity, and it is suitable for determining lead in drink.
Key words: static electric anodic stripping voltammetry, determination, drink, lead
王春平, 刘红云. 静态电位溶出法测定饮料中的铅[J]. 食品科学, 2008, 29(6): 361-363.
WANG Chun-Ping, LIU Hong-Yun. Determintion of Lead in Beverage by Static Electric Anodic Stripping Voltammetry[J]. FOOD SCIENCE, 2008, 29(6): 361-363.
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