期刊
MICROCHEMICAL JOURNAL
卷 137, 期 -, 页码 329-333出版社
ELSEVIER
DOI: 10.1016/j.microc.2017.11.016
关键词
Non-aqueous phase hydride generation; Solid reductant; Atomic fluorescence spectrometry; Rapid cloud point extraction; Bismuth
资金
- National Natural Science Foundation of China [21465001]
Hydride generation (HG) of bismuth was accomplished in non-aqueous media by using solid reductant of potassium borohydride (KBH4) as a derivation reagent. The riched micelle phase of surfactant Triton X-114 was used as the non-aqueous media for the chemical vapor generation (CVG), and atomic fluorescence spectrometry (AFS) was used for the elemental determination. The analyte ions were firstly extracted into the non-aqueous media from the bulk aqueous phase of analyte/sample solution via a rapid cloud point extraction (RCPE) process and then directly mixed with the solid reductant KBH4 to generate volatile bismuth hydride in a specially designed reactor, which was then rapidly transported to a commercial atomic fluorescence spectrometer for detection. Under the optimal conditions, the limit of detection (LOD) for bismuth was 0.08 mu g/L. Compared to conventional HG-AFS, the efficiency of non-aqueous phase HG accomplished using solid reductant and the analytical performance of the developed method was considerably improved. (C) 2017 Elsevier B.V. All rights reserved.
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