Multiresidue Pesticide Analysis in Onion Using GC-MS/MS Using Modified QuEChERS Method with Zirconium Oxide Nanoparticle

In this research, a straightforward sample treatment for multiresidue pesticide evaluation of onion samples was developed using the solid-phase extraction/quick, easy, cheap, effective, rugged, and secure (SPE/QuEChERS) method. The suggested technique is based on acetonitrile liquid-liquid partitioning, then follows dispersive solid-phase extraction with ZrO₂ particles for extract purification. ZrO₂ is synthesized via co precipitation and analyzed via XRD, FTIR, and SEM. ZrO₂ has been demonstrated to be more effective than normal graphitized carbon black at eliminating pigment. Thirty-five pesticides from various chemical classes were examined using gas chromatography and tandem mass spectrometry (GC-MS/MS) to assess the outlined technique. Most analytes had recoveries in the range of 74–105%, with relative standard deviations of less than 14%. The linearity, precision, and accuracy of GC-MS/MS were adequate. The validated technique was applied effectively to onion samples from the farmer’s field.