期刊
TALANTA
卷 59, 期 5, 页码 943-949出版社
ELSEVIER
DOI: 10.1016/S0039-9140(02)00639-2
关键词
ICP-OES; flow injection; on-line preconcentration; nickel in water samples
An on-line nickel preconcentration and determination system implemented with inductively coupled plasma optical emission spectrometry (ICP-OES) associated to flow injection (171) was studied. Trace amounts of nickel were preconcentrated by sorption on a conical minicolumn packed with activated carbon (AC) at pH 5.0. The nickel was removed from the minicolumn with 20% nitric acid. An enrichment factor of 80-fold for a sample volume of 50 ml was obtained. The detection limit (DL) value for the preconcentration method proposed was 82 ng l(-1). The precision for ten replicate determinations at the 0.5 mug l(-1) Ni level was 3.0% relative standard deviation (R.S.D.), calculated from the peak heights obtained. The calibration graph preconcentration method for nickel was linear with a correlation coefficient of 0.9997 at levels near the detection limits (DL) up to at least 100 mug l(-1). The method was successfully applied to the determination of nickel in natural water samples. (C) 2003 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据