1.The standard methods using modern equipments like GCMS are very accurate and reliable but time consuming and of course the equipments are expensive.

2. Regarding simple kit for quick test for residues in the field, I have had of one which can detect residues in the field within 5 to 30 minutes and can be used in the field. The good news is that it can detect as far as 0.5 microgram per gram sample which is Normal max permissible level for pesticides in food products. It can work on residues in fruits, grains, vegetables, soils ans water. If you need more information contact FOOD AND FERTILIZERS TECHNOLOGY CENTER OF PHILLIPINES (contact [email protected])