杨茹, 赵珍阳, 龚子珊, 汪曣, 傅霜, 韩文念, 张勇, 王世功, 孙传强. Determination of Lead in Serum by ICP-MS Based on Magnetic Particle Enrichment[J]. 2019, 38(11): 1364-1368.DOI: doi:10.3969/j.issn.1004-4957.2019.11.013.
Magnetic particles with a particle size of 400 nm were synthesized in one step by hydrothermal method for the detection of Pb2+ in human serum.They were characterized by Zeta potentiometry and single particle inductively coupled plasma mass spectrometry(SP-ICP-MS).The serum samples were pretreated by microwave digestion method
then separated and enriched with Fe3O4 magnetic particles
and finally detected by ICP-MS.Experimental conditions for the separation and enrichment of Pb2+ using Fe3O4 magnetic particles were optimized.The quantitative detection of Pb2+ in serum was successfully achieved at pH 50
using a 400 μL of adsorbent adsorbing for 30 min
and the enrichment factor was 10.The limit of detection(LOD) and the limit of quantitation(LOQ) were 7 ng/L and 23.1 ng/L