Nonstereoselective dissipation of sulfoxaflor in different Puer tea processing

The stereoisomer behavior of sulfoxaflor was investigated by liquid chromatography-tandem mass spectrometry (LC-MS/MS) during raw Puer tea, ripen Puer tea, and sun-dry Puer tea processing. The persistence of sulfoxaflor stereoisomers was consistently prolonged with different Puer tea processing from sun-dry Puer tea, ripen Puer tea to raw Puer tea with t _1/2 4.0-4.2 hr (sun-dry Puer tea) to 6.21-7.04 months (raw Puer tea). Three fermentation temperature in ripen Puer tea shown that the sulfoxaflor residue was easy to degrade under low fermentation temperature (37°C). It implied that enzyme catalysis may play an important role in degradation of sulfoxaflor. The no-enantioselective dissipation of sulfoxaflor was found in different Puer tea processing.