摘要
研制了溴邻苯三酚红 (BPR)作修饰剂的碳糊修饰电极 ,并用此电极作工作电极建立了测定痕量锑的吸附伏安法。在选定的实验条件下 ,峰电流与Sb(Ⅲ )浓度在 8.0× 1 0 -9～ 2 .0× 1 0 -7mol L范围内呈线性关系 ,检出限为 2 .0×1 0 -9mol L ,1 0次测定相对标准偏差为 2 .0 % ,不用分离 ,可直接测定食品中痕量Sb(Ⅲ ) ,测定的回收率为 90 %～ 1 0 3%。
A bromopyrogallol red modified carbon paste electrode was prepared and used as a working electrode for the selective preconcentration of antimony(Ⅲ). The adsorptive stripping voltammetry for determination of Sb was studied in detail. The peak current was proportional to the concentration of Sb(Ⅲ) in the range of 8.0×10^(-9)～2.0×10^(-7) mol/L with a detection limit of 2.0×10^(-9) mol/L. The relative standard deviation(RSD) was 2.0%(n=10). The method was applied to the determination of trace antimony in food without separation and the recovery was in the range of 90%～103%.
出处
《分析试验室》
CAS
CSCD
北大核心
2004年第7期13-15,共3页
Chinese Journal of Analysis Laboratory
关键词
锑
食品
碳糊修饰电极
吸附伏安法
Antimony
Food
Modified carbon paste electrode
Adsorptive voltammetry
