Contribution of Sample Processing to Variability and Accuracy of the Results of Pesticide Residue Analysis in Plant Commodities
Autor: | Róbert Szitás, Henriett Szemánné Dobrik, Kamirán Á. Hamow, Etelka Solymosné Majzik, Árpád Ambrus, Viktor Juhász, Judit Buczkó |
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Rok vydání: | 2016 |
Předmět: |
Sample (material)
Sample processing Analytic Sample Preparation Methods Food Contamination Zea mays 01 natural sciences Mass Spectrometry 0404 agricultural biotechnology Solanum lycopersicum Statistics Residue (complex analysis) Chromatography Pesticide residue 010401 analytical chemistry Pesticide Residues 04 agricultural and veterinary sciences General Chemistry Lettuce Pesticide 040401 food science 0104 chemical sciences Fruit Environmental science Comminution General Agricultural and Biological Sciences Homogenization (biology) |
Zdroj: | Journal of Agricultural and Food Chemistry. 64:6071-6081 |
ISSN: | 1520-5118 0021-8561 |
Popis: | Significant reduction of concentration of some pesticide residues and substantial increase of the uncertainty of the results derived from the homogenization of sample materials have been reported in scientific papers long ago. Nevertheless, performance of methods is frequently evaluated on the basis of only recovery tests, which exclude sample processing. We studied the effect of sample processing on accuracy and uncertainty of the measured residue values with lettuce, tomato, and maize grain samples applying mixtures of selected pesticides. The results indicate that the method is simple and robust and applicable in any pesticide residue laboratory. The analytes remaining in the final extract are influenced by their physical-chemical properties, the nature of the sample material, the temperature of comminution of sample, and the mass of test portion extracted. Consequently, validation protocols should include testing the effect of sample processing, and the performance of the complete method should be regularly checked within internal quality control. |
Databáze: | OpenAIRE |
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