期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 148, 期 -, 页码 72-77出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.03.129
关键词
Ultrasound-assisted cloud point extraction; Ultrasound-assisted dispersive liquid liquid microextraction; Preconcentration; Spectrophotometer; Copper
类别
资金
- National Natural Science Foundation of China [21165001]
- Beijing Rayleigh Analytical Instrument Co., Ltd.
In this work, ultrasound-assisted cloud point extraction (UA-CPE) and ultrasound-assisted dispersive liquid liquid microextraction (UA-DLLME) were investigated and compared firstly as ultrasound-assisted liquid phase microextraction methods, which were coupled with spectrophotometer for copper preconcentration and detection. Compared to conventional CPE and DLLME, the extraction patterns were changed and improved by the effect of ultrasound. As novel methods, their applications were expanded and the analytical performance of spectrophotometric determination for copper was considerably improved. The influence factors of UA-CPE and UA-DLLME were studied in detail. Under the optimal conditions, the limits of detection (LODs) for copper were 0.7 mu g L-1 of UA-CPE and 0.8 mu g L-1 of UA-DLLME with sensitivity enhancement factors (EFs) of 17 and 16. The developed methods were applied to the determination of trace copper in real water samples with satisfactory analytical results. (C) 2015 Elsevier B.V. All rights reserved.
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