Determination of lead and cadmium in water samples by magnetic solid-phase extraction

Abstract

Abstract: Objective To take the ethylene diamine tetraacetic acid（EDTA） modified β-cyclodextrin-（CD） chitosan（CS）/Fe₃O₄（CDCS/Fe₃O₄-EDTA） as magnetic solid-phase extraction adsorbent,develop a method for the simultaneous determination of lead and cadmium in water samples by magnetic solid phase extraction-inductively coupled plasma mass spectrometry（ICP-MS）. Methods The conditions that affect the efficiency of solid-phase extraction,such as pH,extraction time,adsorbent dosage and eluent,were optimized. Results Under the optimal conditions,the maximum adsorption capacities of magnetic chitosan were 57.2 mg/g for lead and 43.7 mg/g for cadmium. The adsorptions reached saturation state within 12 min. There was a good linear relationship for lead and cadmium within the range of 0.2-10.0 μg/L,the correlation coefficient was 0.999 9 and 0.999 9 respectively,and the detection limit was 0.02 and 0.05 μg/L respectively. Conclusion The CDCS/Fe₃O₄-EDTA has successfully extracted and enriched lead and cadmium in environmental water samples.

Key words: Magnetic chitosan, β-cyclodextrin, Lead, Cadmium, Inductively coupled plasma mass spectrometry

CLC Number:

R115

WANG Lu, WU Junwei, SONG Xin, FENG Xiaoqing, YANG Pengfei, ZHANG Minhui. Determination of lead and cadmium in water samples by magnetic solid-phase extraction. [J]OCCUPATION AND HEALTH, 2023, 39(15): 2026-2029.

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