期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1600, 期 -, 页码 9-16出版社
ELSEVIER
DOI: 10.1016/j.chroma.2019.04.031
关键词
Porous organic polymer; Carbamate pesticides; Solid phase extraction; High performance liquid chromatography
资金
- National Natural Science Foundation of China [31471643, 31571925, 31671930]
- Natural Science Foundation of Hebei Province [B2016204136, B2016204146, B2017204025]
- Scientific and Technological Research Foundation of the Department of Education of Hebei Province [ZD2016085]
- Natural Science Foundation of Hebei Agricultural University [LG201607]
- Innovation Ability Training Program of the Department of Education of Hebei Province [1009050]
A solid phase extraction (SPE) method with a porous organic polymer as adsorbent was established for the extraction of five carbamate pesticides (metolcarb, carbaryl, isoprocarb, bassa and diethofencarb) from milk, white wine and juice samples prior to high performance liquid chromatography-diode array detection. The main factors affecting the SPE were optimized, including sample volume, sample loading rate, sample solution pH, desorption conditions and cartridge reusability. Under the optimal conditions, a good linearity existed in the range from 1.0 to 320.0 ng mL(-1) for milk and white wine samples and from 0.5 to 160.0 ng mL(-1) for juice sample with the correlation coefficients between 0.9956 and 0.9998. The method recoveries of the carbamates were 82.0%-110.0%. The limits of detection were 0.12-0.40 ng mL(-1) for milk and white wine samples, and 0.06-0.20 ng mL(-1) for juice sample. The adsorption mechanism of the adsorbent was investigated by the extraction of different types of organic compounds (carbamates, benzoylurea insecticides, endocrine disrupting chemicals and polycyclic aromatic hydrocarbons) with the adsorbent. The results showed that the existence of the hydrogen-bonding between the adsorbent and the analytes is favorable for the adsorption and strong hydrophobicity seems to have an adverse effect. (C) 2019 Elsevier B.V. All rights reserved.
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