Solid-phase extraction based on mesoporous Fe3O4@mSiO2@Cu2+ magnetic nanoparticles coupled with high performance liquid chromatography for the determination of microcystins in water samples

doi:10.3724/SP.J.1123.2015.01009

Abstract

Abstract:

Mesoporous magnetic nanoparticles of Fe₃O₄@mSiO₂@Cu²⁺ were synthesized by two methods of hydrothermal synthesis and room temperature synthesis. The synthesized mesoporous Fe₃O₄@mSiO₂@Cu²⁺ nanoparticles presented uniform sizes, good magnetic properties and specific selectivity. In this work, a novel magnetic solid-phase extraction (MSPE) method based on mesoporous Fe₃O₄@mSiO₂@Cu²⁺ nanoparticles (NPs) coupled with high performance liquid chromatography (HPLC) was developed for the simultaneous extraction of trace amount of microcystin-LR (MC-LR) in water samples. The MSPE extraction conditions and HPLC conditions were optimized. The results showed that good linear relationship (r=0.9994) was obtained between peak area and mass concentration of MC-LR in the range of 0.1-15 μg/L. The limit of detection was 0.025 μg/L, and the limit of quantification was 0.082 μg/L. Furthermore, this method was used for the analysis of algal toxins in water samples with the recovery of 78%. The results indicated that Fe₃O₄@mSiO₂@Cu²⁺ magnetic nanoparticles were good pretreatment alternatives for the concentration of microcystin-LR in water samples.

Key words: high performance liquid chromatography (HPLC), magnetic nanoparticles, magnetic solid-phase extraction (MSPE), mesoporous, microcystins (MCs), water

CLC Number:

O658

SUN Hong, LOU Dawei, LIAN Lili, HAN Xue, GUO Tingxiu, CHEN Huijun. Solid-phase extraction based on mesoporous Fe₃O₄@mSiO₂@Cu²⁺ magnetic nanoparticles coupled with high performance liquid chromatography for the determination of microcystins in water samples[J]. Chinese Journal of Chromatography, 2015, 33(5): 449-454.

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Solid-phase extraction based on mesoporous Fe₃O₄@mSiO₂@Cu²⁺ magnetic nanoparticles coupled with high performance liquid chromatography for the determination of microcystins in water samples

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