Determination of 21 organophosphorus pesticides in tea by gas chromatography-mass spectrometry coupled with hydroxylated multi-walled carbon nanotubes based on dispersive solid-phase extraction
| Autor: | Huang Huoshui, Yijun Li, Meizhu Xu, Hang Wei, Jiefeng Rong |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
General Chemical Engineering Quechers Mass spectrometry 01 natural sciences Biochemistry Gas Chromatography-Mass Spectrometry Analytical Chemistry law.invention 03 medical and health sciences Organophosphorus Compounds law Electrochemistry Solid phase extraction Pesticides Filtration 030109 nutrition & dietetics Chromatography Tea Pesticide residue Nanotubes Carbon Chemistry Solid Phase Extraction 010401 analytical chemistry Organic Chemistry Extraction (chemistry) 0104 chemical sciences Amine gas treating Gas chromatography–mass spectrometry Food Analysis |
| Zdroj: | Chinese Journal of Chromatography. 34:194 |
| ISSN: | 1000-8713 |
| DOI: | 10.3724/sp.j.1123.2015.07021 |
| Popis: | A rapid determination method of 21 organophosphorus pesticides in tea was developed by QuEChERS method using modified multi-walled carbon nanotubes (MWCNTs-OH), primary-secondary amine (PSA) and MgSO4 coupled with gas chromatography-mass spectrometry. The pesticide residues in tea were extracted with a hexane-acetone (2:1, v/v) mixture, and cleaned up by dispersive solid-phase extraction using MWCNTs-OH and primary-secondary amine (PSA) as the sorbents. After centrifugation and filtration, the target compounds were analyzed by gas chromatography-mass spectrometry and quantified by the external standard method. Under the optimized conditions, good linearities were obtained in the range of 0. 01- 0. 50 mg/kg. The average recoveries were in the range of 81. 5% -109. 4% at three spiked levels, with relative standard deviations (RSDs, n = 5 ) of 2. 3% - 10. 6%. The limits of quantification were 0. 001-0. 040 mg/kg. This method is simple, fast, sensitive, cheap, and can meet the requirements of the rapid detection of organophosphorus pesticides in tea. |
| Databáze: | OpenAIRE |
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