Method Development and Validation of Indaziflam and Its Five Metabolites in Soil, Water, and Fruits by Modified QuEChERS and UHPLC-MS/MS

A method for simultaneously determining indaziflam and its five metabolites in soil, water, and fruits using ultraperformance liquid chromatography/tandem mass spectrometry was established. The analytes were eluted in <4.5 min. Positive electrospray ionization mode was used. The analytes were extracted using acetonitrile containing 1% ammonium hydroxide, and then the extracts were purified using octadecylsilane and PRiME HLB cartridges. The quantification limits were 0.01-1.01 mu g kg(-1). The linearities of the calibrations for all analytes were excellent (R-2 > 0.9952). The recoveries at spike concentrations of 0.01, 0.1, and 1 mg kg(-1) were 81.3-112.1%. The intraday and interday relative standard deviations were <13.5% and <12.3%, respectively. The method was successfully used to determine indaziflam and its five metabolites in samples from markets and fields. The results confirmed that the method is an effective and robust procedure for routinely determining indaziflam and its metabolites in soil, water, and fruit samples.