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Reference type: Journal
Authors: Zhao BS, He M, Chen BB, Hu B
Article Title: Novel ion imprinted magnetic mesoporous silica for selective magnetic solid phase extraction of trace Cd followed by graphite furnace atomic absorption spectrometry detection.
Publication date: 2015
Journal: Spectrochimica Acta Part B-Atomic Spectroscopy
Volume: 107
Page numbers: 115-124.
DOI: 10.1016/j.sab.2015.03.005
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0584854715000798

Abstract: Determination of trace Cd in environmental, biological and food samples is of great significance to toxicological research and environmental pollution monitoring. While the direct determination of Cd in real-world samples is difficult due to its low concentration and the complex matrix. Herein, a novel Cd(II)-ion imprinted magnetic mesoporous silica (Cd(II)-II-MMS) was prepared and was employed as a selective magnetic solid-phase extraction (MSPE) material for extraction of trace Cd in real-world samples followed by graphite furnace atomic absorption spectrometry (GFAAS) detection. Under the optimized conditions, the detection limit of the proposed method was 6.1 ng L-1 for Cd with the relative standard deviation (RSD) of 4.0% (c = 50 ng L-1, n = 7), and the enrichment factor was 50-fold. To validate the proposed method, Certified Reference Materials of GSBZ 50009-88 environmental water, ZK018-1 lyophilized human urine and NIES10-b rice flour were analyzed and the determined values were in a good agreement with the certified values. The proposed method exhibited a robust anti-interference ability due to the good selectivity of Cd(II)-II-MMS toward Cd(II). It was successfully employed for the determination of trace Cd(II) in environmental water, human urine and rice samples with recoveries of 89.3-116%, demonstrating that the proposed method has good application potential in real world samples with complex matrix
Template and target information: cadmium ion, Cd(II)
Author keywords: Ion imprinted magnetic mesoporous silica, Cd(II), Magnetic solid phase extraction (MSPE), Graphite furnace atomic absorption spectrometry (GFAAS), Complex matrix samples

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