There are other methods for pesticides residues analysis in soil (exception chromatography) !
Dear Slamene,
Unfortunately, most of the available methods are by GC/ECD or LC-MS.
You may see the following link:
https://clu-in.org/download/ert/1809-r20.pdf
Hoping this will be helpful,
Rafik
Please follow the links below.
https://www.researchgate.net/publication/233766149_Methods_of_Pesticide_Residue_Analysis
http://www.intechopen.com/books/pesticides-in-the-modern-world-trends-in-pesticides-analysis/modern-extraction-techniques-for-pesticide-residues-determination-in-plant-and-soil-samples
https://www.researchgate.net/publication/23148648_Determination_of_Pesticide_Residue_in_Soil_Water_and_Grain_from_IPM_and_Non-IPM_Field_Trials_of_Rice
https://www.researchgate.net/publication/223224762_Determination_of_Pesticides_and_their_Degradation_Products_in_Soil_Critical_Review_and_Comparison_of_Methods
Article Methods of Pesticide Residue Analysis
Article Determination of Pesticide Residue in Soil, Water and Grain ...
Article Determination of Pesticides and their Degradation Products i...
If you don't have gas or liquid chromatography equipment, you can use thin layer chromatography (TLC - cheap and easy). Basically it uses the same principal as other forms of chromatography, but instead of a column, it uses glass plates with a thin coating of the solid phase required - eg silica - to which you apply your extract in a spot a little way above the base of the plate. You dip the plate in solvent mix (the liquid phase) that you know will separate out the compounds of interest and keep it in a closed chamber until the solvent front has reached the top of the plate. You look for bands of different compounds that have moved up the plate (may need UV light or other imaging tools, such as dyes depending on the compound) and use standards to determine what they are). Its an older technique that may be useful if you know what you are looking for (otherwise it would be hard to know what standards to use) and quantitation is not precise unless you can isolate the compound off the plate and do another quantitative analysis. There are some sophisticated high performance TLC pieces of equipment, but if you are looking for something with limited equipment needs, plain TLC may be the way to go. Regards
Andrew
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