Testing food and water for pesticide residues just got easier with a new ‘laboratory on a strip’ developed by Canadian scientists at McMaster University. The simple paper sensor dipstick, similar to litmus paper, can be dipped into water or food and the strip changes color based on pesticide levels.
Using a simple colour-code system the results can be easily checked to ascertain contamination levels.The paper test strips may be of particular use in communities without expensive laboratory testing facilities as the paper strip test is able to detect even trace residues of pesticide and the results are produced in just a few minutes.
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written by devon saker , February 22, 2010