Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

被引：71

作者：

Shokrollahi, Ardeshir ^{[1
]}

Ghaedi, Mehrorang ^{[1
]}

Gharaghani, Shiva ^{[1
,2
]}

Fathi, Mohammad Reza

Soylak, Mustafa ^{[3
]}

机构：

[1] Univ Yasuj, Dept Chem, Yasuj 75914353, Iran

[2] Univ Ahvaz, Dept Chem, Ahvaz, Iran

[3] Erciyes Univ, Dept Chem, TR-38039 Kayseri, Turkey

来源：

QUIMICA NOVA | 2008年 / 31卷 / 01期

关键词：

4-hydroxy-2-mereapto-6-propylpyrimidine; cloud point extraction; copper ion;

D O I：

10.1590/S0100-40422008000100015

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simple cloud point extraction procedure is presented for the preconcentration of copper in various samples. After complexation by 4-hydroxy-2-mercapto-6-propylpyrimidine (PTU), copper ions are quantitatively extracted into the phase rich in Triton X-114 after centrifugation. Methanol acidified with 0.5 mol L-1 HNO3 was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). Analytical parameters including concentrations for PTU, Triton X-114 and HNO3, bath temperature, centrifugation rate and time were optimized. The influences of the matrix ions on the recoveries of copper ions were investigated. The detection limits (3SD(b)/m, n=4) of 1.6 ng mL(-1) along with enrichment factors of 30 for Cu were achieved. The proposed procedure was applied to the analysis of environmental samples.

引用

页码：70 / 74

页数：5

共 34 条

[1] Flame atomic absorption spectrometry determination of trace amounts of copper after separation and preconcentration onto TDMBAC-treated analcime pyrocatechol-immobilized [J].