The concentration of glyphosate in the tap water in Greater Poland Region
The harmfull effects of glyphosate (N-(phosphonomethyl) glycine) on animal and human health was stated by many researchers. The studies on such effects concerned mainly the people exposed to herbicides. In the environment, glyphosate remains relatively stable, with half-life ranged between a few days to several months or even a year in field studies, depending on soil composition. As this herbicide the widely used all over the world, the monitoring its concentration in everyday food becomes necessary. The aim of the study was to estimate the glyphosate levels in tap water samples collected from different Water Treatment Plants in Greater Poland region. The concentration of glyphosate was measured in 66 randomly collected drinking water samples from separate Water Treatment Plants. Measurements were done using two analytical techniques: enzyme-linked immunosorbent assay and high-performance liquid chromatography technique. Levels of glyphosate in the tested samples were low (0.15±0.07 µg/L). Both assays have been found well suited to the analysis of glyphosate concentrations in the drinking water. The concentration of glyphosate in the tap water is very low, and could be discarded in estimation of daily intake of this herbicide in Great Poland region. So, it is unlikely that drinking water from Water Treatment Plants can be important source of glyphosate contamination in urbanized populations compared to vegetables, fruit and other possible sources.
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