A modified QuEChERS method based on a reduced graphene oxide-coated melamine sponge for multiresidue analysis of veterinary drugs in mutton by UPLC-MS/MS

The development of different matrix adsorbents is a research focus in the multiresidue analysis of veterinary drugs in foods. In this study, a novel elastic matrix adsorbent based on a reduced graphene oxide-coated melamine sponge was prepared and applied in matrix purification for the simultaneous determination of 52 veterinary drugs in mutton by UPLC-MS/MS. Efficient and convenient matrix removal was achieved through simple soaking and squeezing. Good linearities with determination coefficients & GE;0.999 and low matrix effects & LE;& PLUSMN;13% were obtained in the range of 10-500 & mu;g & BULL;kg 1. The obtained recoveries ranged from 63.7% to 109.5% at three spiked levels (10, 50, and 100 & mu;g & BULL;kg 1), with relative standard deviations & LE;8.1%. Low LODs and LOQs were obtained in ranges of 0.02-2.0 & mu;g & BULL;kg 1 and 0.05-5.0 & mu;g & BULL;kg 1, respectively. Based on the comprehensive results, our developed method showed good applicability in the analysis of multiresidues in various foods.