Residue Analysis and Dietary Risk Assessment of Metalaxyl in Chinese Bayberry and Dendrobium officinale

Metalaxyl is frequently used to protect a variety of crops from fungal diseases. This study aims establish method for the determination metalaxyl in Chinese bayberry, fresh Dendrobium officinale (D. officinale), and dried D. by gas chromatography-tandem mass spectrometry (GC-MS/MS) further assess dietary risk. The samples were extracted with acetonitrile purified dispersed solid phase extraction method. officinale, collected Hangzhou Zhangzhou 2021 clarify residue levels. was quantitated external standard In range 0.001–0.1 mg L−1, there good linearity under optimal conditions. recoveries ranged 83.90% 110.47%, relative deviations ranging 0.86% 5.81%. detection rates 97.92%, 49.29%, 50.71%, respectively. risk residues acceptable consumers.