Detection and Analysis of 71 Pesticide Residues in Pu'er Tea in Fujian Province
One hundred eighty-eight samples of Pu'er tea sold on the market from January 2022 to June 2023 were purchased,including 92 ripe Pu'er and 96 raw Pu'er tea,to understand the pesticide residues of Pu'er tea on the Fujian market.The 71 pesticide residues of the samples were detected via gas chromatography-mass spectrometry(GC-MS)and liquid chromatog-raphy-mass spectrometry(LC-MS)and analyzed according to the standard of GB 2763-2021,and the results were analyzed and discussed.The results revealed that all 188 samples of Pu'er tea complied with the national food safety standards.The pesticide residue qualification rate was 100%,among which 98 samples of pesticide residues were detected,with a total of 22 kinds of pesticides detected,all of which were non-prohibited pesticides,among which the detection rate of pesticide residues in ripe Pu'er tea(66.3%)＞pesticide residues in raw Pu'er tea(38.54%);the order of the detection rate of different kinds of pesticides was insecticidal and acaricidal class＞herbicidal class.Among the 22 types of pesticides detected,the detection rate of insecticides and acaricides was the highest.In contrast,the detection rate of bifenthrin(38.04%)was the highest in the sample of ripe Pu'er,while the detection rate of azoxystrobin(16.7%)was the highest in the sample of raw Pu'er.Therefore,from the results of pesticide residue testing of Pu'er tea,no prohibited pesticides were detected in the market circulation of Pu'er tea in Fujian Province in general,and the pesticides commonly used by tea growers and enterprises in tea production were mostly bifenthrin,azoxystrobin,and glyphosate.However,the amount of pesticide residues detected was also much lower than the limit value,which indicates that,in the production area of Pu'er tea,the relevant supervisory departments regulate the pesticide market and that the pesticides used in the management of tea gardens have improved publicity and use.There is better publicity and use of pesticides.It shows that in the Pu'er tea production area,the relevant supervisory depart-ments have better publicity and guidance on the regulation of the pesticide market and the reasonable use of pesticides in tea plantation management,which is more effective for ensuring the quality of Pu'er tea products.
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