期刊
TALANTA
卷 80, 期 5, 页码 1907-1912出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2009.10.042
关键词
Arsenic; Eggshell membrane; Solid-phase extraction; Hydride generation atomic fluorescence spectrometry
资金
- Chongqing Science and Technology Commission [2006AA7003]
- Natural Science Foundation of Chongqing [2004BA7019]
- Ministry of Education
The eggshell membrane (ESM) contains several surface functional groups such as amines, amides and carboxylic groups with potential as SPE adsorbent for the retention of target species of interest. In this paper, the potential use of ESM, a typical biomatenal. as solid-phase extraction (SPE) adsorbent is evaluated for analysis of trace arsenic(V) in environmental water samples in combination with hydride generation atomic fluorescence spectrometry (HG-AFS). In order to obtain the satisfactory recovery of arsenic(V), various parameters including the desorption and enrichment conditions such as pH. the flow rate and the volume of sample solution, the amount of ESM and the content of sodium chloride were systematically optimized and the effects of co-existed ions were also investigated in detail. Under the optimal conditions, arsenic(V) could be easily extracted by the ESM packed cartridge and the breakthrough adsorption capacity was found to be 3.9 mu g g(-1). The favorable limit of detection (LOD) for arsenic(V) was found to be 0 001 mu g L-1 with an enrichment factor of 33.3, and the relative standard deviations (R.S.Ds) was 2.1% for 06 mu g L-1 arsenic (n = 11). The reproducibility among columns was satisfactory (R.S.D. among columns is less than 5%). The proposed method has been successfully applied to analysis of arsenic(V) in aqueous environmental samples, which suggests the ESM can be an excellent SPE adsorbent for arsenic(V) pretreatment and enrichment from real water samples. (C) 2009 Elsevier B.V. All rights reserved.
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