Food Testing of Pesticides Residues

Food Testing of Pesticides Residues
04 January 2022

Food Testing of Pesticides Residues

INTRODUCTION


It was thought that the ultimate goal in international trade fairness hinged, among other things, on the accuracy of analytical data. As a result, particularly in pesticide residue analysis was reliant not only on the availability of trustworthy analytical methods, but also on the availability of reliable analytical methods, procedures, but also on the analyst's experience and the upkeep of reliable records pesticide analysis is a common practice. Some of the testing procedures are mentioned below:



COLLECTION OF EXAMPLES
The purpose of this chapter is to focus solely on the collecting of samples for pesticide analysis. The following material is reproduced from the FAO Food Inspection manual to offer a backdrop of pesticide issue regions.



ANALYTICAL RESULTS REPORTING



It is critical to report analytical results in pesticide residue investigations in a uniform and transparent manner.



STANDARDS FOR PESTICIDES


The analytical procedure requires proper storage of reference standards in order to maximise chemical integrity preservation. Most classes of standards in neat (or virtually pure) form are generally stable for at least one year if firmly sealed, protected from light, and refrigerated or frozen, according to studies.



PURIFICATION OF SOLVENTS AND REAGENTS



It is critical to confirm the purity of the solvents and the reagents before beginning any analysis. Purification of reagents and solvents can be avoided if reagent blank analysis reveals no contamination.



IN PESTICIDE RESIDUE ANALYSIS, EXTRACTION AND CLEAN-UP METHODS


Extraction is the process of extracting pesticide residues from a matrix using a solvent. The extraction technique should be such that it extracts pesticides from the matrix quantitatively (high efficiency), without causing chemical changes in the pesticide, and is easy to apply device that is affordable and easy to clean The extraction efficiency from substrates is determined by the extraction method and solvent type.



DETERMINATION OF CHLORINATED PESTICIDES IN FAT AND NON-FAT FOOD USING A MULTIRESIDUE METHOD


Acetonitrile (high -H2O foods) or aqueous Acetonitrile are used to extract the thoroughly mixed test portion (low-H2O or high sugar foods). Fat is separated into pertoleum ether and acetonitrile after being taken from fatty meals. Acetonitrile is diluted with H2O and residues are removed into petroleum ether (non-fatty meals) or the full solution (fatty foods).



MULTI-RESIDUE METHOD FOR ORGANOPHOSPHORUS PESTICIDES DETERMINATION IN FOOD AND AGRICULTURAL SAMPLES


In Food and Agricultural samples, the method describes the simultaneous determination of Acephate, Chlorpyriphos, Chlorpyriphos-methyl, Demeton O, Diazinon, Dimethoate, Ethion, Fenitrothion, Malaoxon, Malathion, Methamidophos, Monocrotophos, Omethoate Paraoxon, Paraoxonmethyl, Parathion, Parathion-methyl, Phosalone,



METHOD FOR SYNTHETIC PYRETHROID IN FOOD COMMODITIES USING MULTI-RESIDUE GAS CHROMATOGRAPHY


The GLC determination of bifenthrin, fenpropathrin, cyhalothrin, permethrin, cypermethrin, fluvalinate, fenvalerate, and deltamethrin in food commodities is described in the analytical procedure.



THE DETERMINATION OF NMETHYLCARBAMATE INSECTICIDES IN FOOD COMMODITIES USING A MULTI-RESIDUE METHOD
 


The analytical approach calls for using a gas liquid chromatographic method to determine carbaryl and carbofuron levels in food.



FOR FUMIGANTS, A MULTI-RESIDUE METHOD


Ethylene dibromide, carbon tetrachloride, and methyl bromide can all be used in this process. Repeated determinations are recommended to compensate for the lack of a good composite.



ORGANOCHLORINE AND PYRETHROID PESTICIDES IN MILK, FISH, AND EGGS ARE DETERMINED USING A MULTIRESIDUE GAS CHROMATOGRAPHIC METHOD
 


The current method established an analytical procedure for detecting organochlorine and synthetic pyrethroids in milk, fish, and eggs.