线性扫描吸附伏安法测定食品中痕量氟  

Determination of trace fluoride in foods using linear sweep adsorptive stripping voltammetry

作　　者：姚胜来[1] 吴晓刚[1] 姚鑫[1] 詹彤[1] 

机构地区：[1]华中师范大学化学系,武汉430079

出　　处：《华中师范大学学报（自然科学版）》2001年第2期172-175,共4页Journal of Central China Normal University：Natural Sciences

摘　　要：报道了食品中氟的线性扫描溶出伏安法测定 .在 p H=4 .9的 0 .0 2 mol/L六次甲基四胺的缓冲溶液中 ,铈 -茜素络合剂 -氟的络合物产生一灵敏的阴极峰 ,峰电位为 -0 .85V( vs.SCE) ,峰高与 F- 浓度在 2 .0× 1 0 - 8～ 4 .0× 1 0 - 7mol/L范围内呈线性关系 ,检出限为 1 .0× 1 0 - 8mol/L .该法用于食品中的痕量氟的测定 ,结果满意 .另外 。This paper reports the determination of fluoride in food by linear sweep stripping voltammetry. In the buffer solution of (CH 2) 6N 4 at pH=4.9, a sensitive adsorptive complex wave of cerium(Ⅲ) alizarin complexone fluoride can be obtained by linear sweep stripping voltammetry. The peak potential appears at -0.8 V(vs. SCE). The peak height is proportional to the concentration of fluoride over the range of 2.0×10 -8 ~4.0×10 -7 mol/L. The detection limit is 1.0×10 -8 mol/L. The method has been used for the determination of fluoride in food with satisfactory results.This paper also studies the characteristics of the peak current and mechanism of the electrode process.

关 键 词：氟离子 苯素络合剂 线性溶出伏安法 线性扫描吸附伏安法 食品检测 

分 类 号：TS207.3[轻工技术与工程—食品科学]