摘要
设计了一种流动注射———MIBK-KI萃取———FAAS测定痕量铅的流路系统。结果表明用该流路系统测铅,操作简单,精度好,与传统手工萃取法比具有改善灵敏度,提高分析速度的优点。
A simple method for determinating trace Pb has been developed. In this work Pb was determined by FAAS using an on- line MIBK liquid- liquid extraction system after Pb2+ being chelated with I- .Manifold parameters and chemical conditions were described in detail.The sampling rate of 20h- 1 could be achieved.The detection limit for Pb was 1.2μ g/ml(3σ )and the relative standard deviation was 3.2% (n=10)at the concentration level of 0.2μ g/ml.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2001年第9期70-72,共3页
Food Science
基金
国家自然科学基金资助项目(No.39870190)
