What is the best method for extraction of pesticide residues in meat, animal tissues and animal feed. Is quechers method applicable here?
Dear Sir. Concerning your issue about the best method for extraction of pesticides before injection to GC. The careful distribution of the target pesticide analytes into the different methods is critical in achieving the best overall performance in terms of accuracy, precision, speed and cost of analysis. Because of the diversity of physicochemical properties, not all of the pesticides in a multi-class, multi-analyte method will give results compliant with guideline validation or analytical quality control criteria (e.g., European Commission Directorate-General for Health and Food Safety or EU SANTE Guidelines)2, but the results may still be considered adequate to demonstrate the absence of a particular residue in the sample. This is more acceptable when the pesticide in question is not present as a residue. I think the following below links and the attached file may help you in your analysis:
http://tools.thermofisher.com/content/sfs/brochures/WP-72048-MS-Sample-Preparation-WP72048-EN.pdf
https://www.omicsonline.org/chromatographic-determination-of-pesticides-in-foods-and-food-products-2155-9600.1000126.php?aid=4380
Thanks
a suggest for a new chemist before asking a question on this board, please use internet and google anything you want to know. You will get most of it and reserve the board for a specific question that is harder to solve. I spent 5 sec on it and get the paper below.
I need the answer too . Thank you Dr. Isam Eldin Hussein Elgailani
There is no one method for all pesticides (insecticide, fungicide, herbicide, acaricide, rodenticide, nematicide, bactericide, ... and so forth). The best method will also depend on the substrate. Are you collecting tissue from a bird, plant, insect, soil, air, or water? How will you extract the pesticide from the sample? Be careful, some pesticides will interact with the container or materials used to collect the sample. Will the pesticide have time to degrade, and are you interested in the breakdown products? Sometimes the breakdown product is more toxic than the parent compound. Once you narrow down the project, you should consult a good chemist who does this sort of analysis.
See this link may be helpful
http://tools.thermofisher.com/content/sfs/brochures/WP-72048-MS-Sample-Preparation-WP72048-EN.pdf
Regards
Yes, the Quechers method for extraction is the good method. I used for extraction for residues of pesticides and after extraction i was analyzed pesticides with GC. I recommend it.
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