摘要
利用吡咯烷二硫代氨基甲酸铵作为螯合剂,甲基异丁酮作为萃取剂,将水相中的Pb2+萃取到有机相中,利用经典的三电极系统研究该有机相在液/液界面的伏安特性.实验结果表明,该电化学过程是一个不可逆过程,Pb2+的萃取物从有机相转移到水相.铅萃取物的转移峰在0.16Vvs.SCE处,并且在1.0×10-5～9.0×10-5mol/L范围内与峰电流大小成正比.这一方法为工业废水中铅的在线、现场测定提供了可靠、灵敏的监测方法.
The ammonium pyrrolidinyldithiocarboxylate （APDC） was used as a chelate reagent, and then the pb^2＋-APDC complex was extracted by methyl isobutyl ketone from an aqueous phase to an organic phase. The cyclic voltammetric behavior of the organic phase at the liquid/liquid interface has been studied with a classic three-electrode system. The results indicated that the transfer process of Pb^2＋-APDC complex from the organic phase to the aqueous phase was irreversible. The transferring peak of Pb^2＋ extractant appeared at 0.16 V vs. SCE, and was linearly proportional to the peak current between 1.0 ×10^-5～9.0×10^-5 mol/L. Based on this, a reliable and sensitive method can be developed for the on-line and in-situ determination of Pb^2＋ in industrial waste water.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第1期79-83,共5页
Acta Chimica Sinica
基金
国家863(No.2006AA06Z405)资助项目
关键词
液
/液界面
循环伏安
铅离子
甲基异丁酮
吡咯烷二硫代氨基甲酸铵
liquid/liquid interface
cyclic voltammetry
Pb^2＋ ion
methyl isobutyl ketone
ammonium pyrrolidinyldithiocarboxylate
