A sensitive spectrophotometric method for lead determination by flow injection analysis with on-line preconcentration

被引：44
|
作者：
Di Nezio, MS [1 ]
Palomeque, ME [1 ]
Band, BSF [1 ]
机构：
[1] Univ Nacl Sur, Dept Chem, FIA Lab, RA-8000 Bahia Blanca, Buenos Aires, Argentina
来源：
TALANTA | 2004年 / 63卷 / 02期
关键词：
lead; preconcentration; spectrophotometric; FIA;
D O I：
10.1016/j.talanta.2003.11.012
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new flow injection (FI) system for the determination of Pb(II) at trace level with a preconcentration step and spectrophotometric detection is proposed. It is based on preconcentration of lead ions on chitosan and dithizone-lead complex formation in aqueous medium (pH 9). The chemicals and FIA variables influencing the performance of the system were optimized and applied to the determination of lead in natural, well, and drinking water samples. It is a simple, highly sensitive, and low cost alternative methodology. The method provided a linear rage between 25 and 250 mug l(-1), a detection limit of 5.0 ng ml(-1) and a sample throughput of 15 h-(1). The obtained results of spiked samples ate in good agreement between the proposed method and ICP-AES. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：405 / 409
页数：5
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