▎ 摘　　要

NOVELTY - Determination of neonicotinoid pesticides in tea comprises boiling 100 mL water, adding 3-5 g tea sample, filtering, cooling, and standing; adding 50 mL tea in centrifuge tube, adding amino-modified mesoporous silica adsorbent, shaking, centrifuging, and collecting supernatant; adding graphene oxide, oscillating, and fully contacting; centrifuging, discarding aqueous layer, adding eluting solvent, shaking, centrifuging, and collecting supernatant; and adding water scavenger, oscillating, collecting supernatant, rotary evaporating, filtering, and subjecting to HPLC-mass spectrometry analysis. USE - Method for determining neonicotinoid pesticides in tea (claimed). ADVANTAGE - The method has high accuracy, efficiency, and stability, and low detection limit, small adsorbent dosage, strong absorbing ability, low cost, and simple process, uses small amount of organic solvent, and is environment-friendly. DETAILED DESCRIPTION - Determination of neonicotinoid pesticides in tea comprises boiling 100 mL water, adding 3-5 g tea sample, filtering after 5-10 minutes, cooling, and standing; adding 50 mL tea in 10 mL centrifuge tube, adding amino-modified mesoporous silica adsorbent, shaking, centrifuging, and collecting supernatant; adding graphene oxide, oscillating, and fully contacting; centrifuging, discarding aqueous layer, adding eluting solvent, shaking, centrifuging, and collecting supernatant; and adding water scavenger, oscillating, collecting supernatant, rotary evaporating, filtering, and subjecting to HPLC-mass spectrometry analysis.