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Evaluation and interlaboratory validation of a GC-MS method for analysis of pesticide residues in tea
Peng, C. F., Kuang, H., Li, X. Q. and Xu, C. L. Evaluation and interlaboratory validation of a GC-MS method for analysis of pesticide residues in tea Chemical Papers, Vol.61, No. 1, 2007, 1-5
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Peng, C. F.
Kuang, H.
Li, X. Q.
Xu, C. L.
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| Title |
Evaluation and interlaboratory validation of a GC-MS method for analysis of pesticide residues in tea
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| Journal name |
Chemical Papers
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| Publication date |
2007
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| Year available |
2007
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| Volume number |
61
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| Issue number |
1
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| ISSN |
0366-6352
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| Start page |
1
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| End page |
5
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2007
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| Language |
english
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| Subject |
290000 Engineering and Technology
290100 Industrial Biotechnology and Food Sciences
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| Abstract/Summary |
A method was described for simultaneous determination of nine organic heterocyclic pesticide residues by gas chromatography-mass spectrometry-selected ion monitoring. Atrazine, vinclozolin, procymidone, triflumizole, imazalil, buprofezin, propiconazole, fenarimol, and pyridaben were clearly separated from each other, extracted with acetone—hexane mixture, purified with graphitized carbon black cartridge and neutral Al2O3 cartridge, eluted with acetone—hexane mixture, simultaneously determined by GC-MS, and then quantified with an external standard method. Recoveries of pesticides ranged from 73 % to 116 % at the spiked level of 0.01–30 mg kg−1, while the relative standard deviation was between 3 % and 27 %. In addition, the limits of determination (0.01 mg kg−1 to 5.0 mg kg−1) and linearity (0.02–40 μg mL−1) revealed that simultaneous determination of multi-residues in Chinese teas (like Oolong tea, green tea, red tea, etc.) was possible. Furthermore, an interlaboratory study among 5 labs was conducted to further validate the method, and the results were satisfactory.
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