Issue 7, 2010
From the journal:

Journal of Analytical Atomic Spectrometry

Thin film hydride generation: determination of ultra-trace copper by flow injection in situhydride trapping graphite furnace AAS

Chengbin Zheng,ab   Ralph E. Sturgeon*a  and  Xiandeng Houb  

* Corresponding authors

a Institute for National Measurements Standards, National Research Council Canada, Ottawa, Ontario, Canada
E-mail: Ralph.Sturgeon@nrc.ca
Fax: +1 613 993-6395

b College of Chemistry, Sichuan University, Chengdu, Sichuan, China

Abstract

A novel system which significantly enhances copper hydride generation efficiency was used for the determination of trace copper by coupling a flow injection system to a graphite furnace for in situ collection of the analyte and subsequent AAS detection. A single device integrated the functions of hydride generator and gas liquid separator. Solutions of the sample containing 0.0005% (m/v) phenanthroline and 1% formic acid were merged with tetrahydroborate reductant to yield a thin film wetting a reaction surface from which product vapor was efficiently liberated and transported to the heated furnace. Optimum operating conditions provided for a generation/transport/collection efficiency of 8–12%. Interferences from common transition and noble metals were effectively eliminated. A limit of detection of 100 pg ml−1 was obtained based on processing a 1 ml sample volume. A precision of better than 4% (RSD) at 1 ng ml−1 was typical. The methodology was successfully applied to the determination of Cu in several NRCC natural water and biological tissue Certified Reference Materials.

Graphical abstract: Thin film hydride generation: determination of ultra-trace copper by flow injection in situ hydride trapping graphite furnace AAS

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Article information

DOI
https://doi.org/10.1039/C002360D
Article type
Technical Note
Submitted
03 Feb 2010
Accepted
26 Apr 2010
First published
18 May 2010

J. Anal. At. Spectrom., 2010,25, 1159-1165

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Thin film hydride generation: determination of ultra-trace copper by flow injection in situ hydride trapping graphite furnace AAS

C. Zheng, R. E. Sturgeon and X. Hou, J. Anal. At. Spectrom., 2010, 25, 1159 DOI: 10.1039/C002360D

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