期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 123, 期 -, 页码 200-205出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2013.12.074
关键词
Rapidly synergistic cloud point extraction; Ultrasound-assisted cloud point extraction; Preconcentration; Spectrophotometric determination; Selenium
类别
资金
- National Natural Science Foundation of China [21165001]
- Beijing Rayleigh Analytical Instrument Co., Ltd.
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.
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