5 Things You Need to Know about Glyphosate Testing
Following 2 years of independent research on the available testing methods for glyphosate around the World, Henry Rowlands, Director of The Detox Project has summarized this glyphosate testing research into 5 points for NGOs, the public, commercial companies and government regulators:
1. Glyphosate residues are never tested for in final food products by any regulators or companies worldwide, despite being the World’s most used herbicide. Raw materials such as Soybeans and Maize are also hardly ever tested for glyphosate. This needs to change and the excuse of expense is no longer valid due to a reduction in the price of glyphosate testing across the board.
2. Methods for chemical testing including glyphosate testing should always have minimum limits of detection of 0.5 parts per billion (PPB) or lower for urine and water and under 20 PPB where possible for food samples. Anything higher than these will give irresponsible results as the methods will give negative results even if the sample actually does contain glyphosate.
3. Validated or Verified LC/MS/MS (Liquid chromatography-tandem mass spectrometry) testing methods are the most responsible methods that should be used in testing urine, water or food for glyphosate and AMPA residues. The labs that the Detox Project works alongside use these methods only.
4. ELISA testing methods for pesticides can produce false positive and false negative results and thus can not be used by regulators – ELISA methods can give inaccurate results. These methods are usually used as a screening tool and any positive results have to be confirmed by a chromatographic method to be usable in risk assessment.
5. Some of the LC/MS/MS methods that are used by the food industry and regulators, on the odd occasion that they do test for glyphosate residues, have very poor recovery rates – meaning they cannot be relied upon to give accurate results.
Please also see: 10 Things You Need to Know about Glyphosate