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Preparation of flower-like molybdenum disulfide for solid-phase extraction of N-nitrosoamines in environmental water samples |
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| Authors: | Bingzhi Li Min Chen Yang Li Xiaolin Cao Yongxin She Jungang Yin Shuang Cong Ziping Zhang |
| Institution: | 1. College of Life Science, Yantai University, Yantai, P. R. China
These authors contributed equally to this work.;2. Yantai Academy of Agricultural Sciences, Yantai, P. R. China These authors contributed equally to this work.;3. College of Life Science, Yantai University, Yantai, P. R. China;4. Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Ministry of Agriculture of China, Beijing, P. R. China |
| Abstract: | In this paper, a flower-like molybdenum disulfide material was prepared by hydrothermal method and was first used as adsorbents in the solid-phase extraction process for enriching N-nitrosoamines. Molybdenum disulfide exhibited three-dimensional petal-like microspheres with about 500 nm in diameter. The relevant analyte extraction and elution parameters (sample volumes, solution pH, washing solvents, elution solvents, and elution volumes) were optimized to improve the solid-phase extraction efficiency. The solid-phase extraction process coupled with high-performance liquid chromatography-tandem mass spectrometry for determining N-nitrosoamines in environmental water samples was established. The limits of detection were in the range of 0.01–0.05 ng/mL. The satisfactory recoveries (68.9–106.1%) were obtained at three different spiked concentrations (2, 5, and 8 ng/mL) in water samples, and the relative standard deviations were between 1.96 and 8.38%. This proposed method not only showed high sensitivity and good reusability but also provided a new adsorbent for enriching trace N-nitrosoamines in environmental water samples. |
| Keywords: | environmental water samples flower-like molybdenum disulfide N-nitrosamines solid-phase extraction |