摘要
Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn 2+ , the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential simple oscillographic voltammetric method for determination of Zn 2+ was developed. The method is applied to the determination of zinc gluconate in tablet. The linear range of Zn 2+ was 2.0×10 -7 ～8.6×10 -6 mol/L,detection limit 1×10 -7 mol/L, and RSD for determinations of 4.2×10 -6 mol/L Zn 2+ ( n=7 ) was 2.4%.
Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn 2+ , the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential simple oscillographic voltammetric method for determination of Zn 2+ was developed. The method is applied to the determination of zinc gluconate in tablet. The linear range of Zn 2+ was 2.0×10 -7 ～8.6×10 -6 mol/L,detection limit 1×10 -7 mol/L, and RSD for determinations of 4.2×10 -6 mol/L Zn 2+ ( n=7 ) was 2.4%.
出处
《应用化学》
CAS
CSCD
北大核心
2003年第1期83-85,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金 (2 0 2 75 0 30 )
国家教育部科学技术研究重点项目 (0 2 187)
高等学校骨干教师资助计划 (GG 15 0 710 0 6 2877)
陕西省教委专项基金 (01jk0 76)资助项目
