Comparison of rapidly synergistic cloud point extraction and ultrasound-assisted cloud point extraction for trace selenium coupled with spectrophotometric determination

被引:30
作者
Wen, Xiaodong [1 ]
Zhang, Yanyan [1 ]
Li, Chunyan [1 ]
Fang, Xiang [1 ]
Zhang, Xiaocan [1 ]
机构
[1] Dali Univ, Coll Pharm & Chem, Dali 671000, Yunnan, Peoples R China
基金
中国国家自然科学基金;
关键词
Rapidly synergistic cloud point extraction; Ultrasound-assisted cloud point extraction; Preconcentration; Spectrophotometric determination; Selenium; ATOMIC-ABSORPTION-SPECTROMETRY; OPTICAL-EMISSION-SPECTROMETRY; LIQUID-LIQUID MICROEXTRACTION; PLASMA-MASS SPECTROMETRY; WATER SAMPLES; SELECTIVE PRECONCENTRATION; CADMIUM; COBALT; LEAD; QUANTIFICATION;
D O I
10.1016/j.saa.2013.12.074
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
In this work, rapidly synergistic cloud point extraction (RS-CPE) and ultrasound-assisted cloud point extraction (UA-CPE) were firstly compared and coupled with spectrophotometer for selenium preconcentration and detection. The established RS-CPE pretreatment was simple, rapid and high effective. The extraction time was only 1 min without heating process. Under the effect of ultrasound, UA-CPE accomplished extraction efficiently although the extraction procedure was relatively time-consuming. In this study. RS-CPE and UA-CPE were firstly applied for selenium preconcentration and coupled with conventional spectrophotometer. Their applications were expanded and the analytical performance of spectrophotometric determination for selenium was considerably improved. The influence factors relevant to RS-CPE and UA-CPE were studied in detail. Under the optimal conditions, the limits of detection (LODs) for selenium were respectively 0.2 mu g L-1 of RS-CPE and 0.3 mu g L-1 of UA-CPE with sensitivity enhancement factors (EFs) of 124 and 103. The developed methods were applied to the determination of trace selenium in real water samples with satisfactory analytical results. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:200 / 205
页数:6
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