Abstract

A sensitive and effective method using the QuEChERS procedure for simultaneous determination of metolachlor, pendimethalin and oxyfluorfen residues in bulb vegetables (garlic, Chinese onion, onion, garlic stem and leek) was developed using GC-MS/MS. Samples were extracted with acetonitrile and cleaned-up with primary secondary amines (PSA). The method showed excellent linearity (R2 > 0.997) for target compounds. The limits of quantitation (LOQ) objective for which the method was satisfactorily validated in five samples matrices was 5 μg kg−1 and the limit of detection (LOD) ranged from 0.5 μg kg−1 to 2.3 μg kg−1. Average recoveries in five bulb vegetables at four levels (0.005, 0.025, 0.1 and 1 mg kg−1) ranged from 77.5% to 114.2% with relative standard deviations (RSDr) from 1.8% to 14.9%. The reproducibility RSDR ranged from 3.9% to 15.0%. This method was successfully applied for the analysis of real samples, confirming the applicability of the method.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.