当前位置: 首页 > 文章 > 松花蛋中痕量铅的方波溶出伏安法测定 河北科技师范学院学报 2006,20 (1) 37-40
Position: Home > Articles > Determination of Trace Lead with Square Wave Stripping Voltrammetry Journal of Hebei Normal University of Science & Technology 2006,20 (1) 37-40

松花蛋中痕量铅的方波溶出伏安法测定

作  者:
艾珍;廖钫;蔡铎昌
单  位:
西华师范大学化学化工学院
关键词:
松花蛋;痕量铅;含量测定;方波溶出伏安法;抗坏血酸
摘  要:
用方波溶出伏安法测定松花蛋中痕量铅,在抗坏血酸存在下,以0.1 mol/L硝酸溶液为底液,玻碳电极为工作电极,测得铅的溶出峰电位是-0.48 V。峰高与铅浓度在1.00×10-4~1.00×10-6mol/L范围内呈良好的线性关系,铅的检出限为5.00×10-8mol/L,回收率为90%~108%。此法干扰较少,易于掩蔽,灵敏度较高,适用于松花蛋等食品中微量铅的测定。
译  名:
Determination of Trace Lead with Square Wave Stripping Voltrammetry
作  者:
AI Zhen,LIAO Fang,CAI Duo-chang(Institute of Chemical Engineering,China West Normal University,Nanchong Sichuan,637002,China)
关键词:
preserved egg;determination of trace lead;square wave stripping voltrammetry methods;ascorbic acid
摘  要:
In this paper,the method of determination of trace lead in preserved egg with square wave stripping voltrammetry in the presence of ascorbic acid was introduced.In a supporting electrolyte of 0.1 mol/L HNO_3,a sensitive stripping peak of lead was found.The peak potential is-0.48 V.The linear relationship between the stripping current and concentration of Pb~(2+) existed in the range of 1.0×10~(-6)~1.0×10~(-4) mol/L,the detection limit is 5.0×10~(-8) mol/L and the recovery is 90%~108%.The method did not require of removing oxygen and had less interference,good resolution and accuracy,and therefore it was suitable for determining trace lead in food.

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