Monitoring and Risk Assessment of 30 Kinds of Pesticide Residues inTea Samples
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Abstract:
To monitor the pollution level of pesticide residues in commercial tea and evaluate the health risk of dietary exposure, 390 tea samples were collected randomly. According to GB 2763-2016, 30 kinds of pesticide residues were detected. The risk of dietary exposure was assessed by point evaluation and @Risk v7.6 software. Health risk existed in the process of tea planting, such as overuse of pesticides and combined use of multiple pesticides. Among 390 samples, bifenthrin was the highest frequency of detection, reached to 39.2%. There were no pesticide residues detected in 48% tea samples. More than 203 samples contaminated by pesticide residues which include 114 samples contained more than 2 kinds of pesticide simultaneously. Fitting value near 95% site of all pesticide residues was lower than maximum residue limits of GB 2763-2016, but three of them were higher than maximum residue limits of European Union. Only glyphosate maximum residue value of a sample was higher than the limit value of GB 2763-2016.The health risk was at an acceptable level of safety, but except the acute hazard quotient fenpropathrin.
