单扫描极谱法测定地质样品、土壤和蔬菜中的氟  

DETERMINATION OF MIRCRO-AMOUNT OF FLUORINE IN THE GEOLOGICAL SAMPLES,SOIL AND BIOLOGICAL SAMPLES BY SINGLE SWEEP POLAROGROPHY

作　　者：陈文[1] 汪模辉[1] 李锡坤[2] 张玉玉[1] 刘静凯[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]广东省物料实验检测中心,广东广州510080

出　　处：《矿物岩石》2006年第1期105-109,共5页Mineralogy and Petrology

基　　金：横向合作项目(2005-G84)

摘　　要：采用三电极系统(工作电极:滴汞电极;参比电极:甘汞电极;辅助电极:铂丝电极),在pH=4.9的六次甲基四胺缓冲溶液中,利用P r3+-ALC-F-三元络合体系及单扫描极谱法测定地质样品、土壤及生物样品中微量氟,该方法操作方便、快速、灵敏,测量的回收率为96%~99%。其起始电位为-0.20 V(vs.SCE),峰电位在-0.58 V(vs.SCE)左右,线性范围为1.0×10-6m o l/L^4.0×1-0 5m o l/L,检出限为:8.0×1-0 7m o l/L。A method for the determination of micro-amounts of F in the supporting solution of hexamethylene tetramine and Pr^3＋-ALC-F^- system by single sweep polargraphy has been proposed. The peak potential is -0.58 V（ vs. SCE） and the peak height is linearly proportional to the concentration of fluorine over the range of 1.0×10^-6 mol/L-4.0×10^-5 mol/L with a detection limits of 8.0×10^-7 mol/L. The method is simple,sensitive and has good selectivity with satisfactory when it is used to analyse geological samples, soil and biological samples.

关 键 词：单扫描极谱法 氟 地质样品 土壤 蔬菜 

分 类 号：P657.14[天文地球—地质学]