# Optimization and Application of the QuEChERS-UHPLC-QTOF-MS Method for the Determination of Broflanilide Residues in Agricultural Soils

## TL;DR

This study optimized a method to detect Broflanilide residues in soil, showing it is accurate and stable for different soil types.

## Contribution

The study introduces an optimized QuEChERS-UHPLC-QTOF-MS method for Broflanilide residue analysis in agricultural soils.

## Key findings

- The average recovery of Broflanilide was between 87.7% and 94.38%.
- The method showed RSD below 7.6% for recovery and 9.2% for adsorption, desorption, and leaching analysis.
- The method is stable and applicable for determining Broflanilide residues in various soil types.

## Abstract

In this study, the separation conditions of UHPLC-QTOF-MS and the extraction conditions of QuEChERS were optimized. The analytical process for determining Broflanilide residues in different soil types was successfully established and applied to its adsorption, desorption, and leaching in soil. Broflanilide was extracted from soil with acetonitrile and purified using PSA and MgSO4. The modified UHPLC-QTOF-MS method was used for quantification. The average recovery of Broflanilide was between 87.7% and 94.38%, with the RSD lower than 7.6%. In the analysis of adsorption, desorption, and leaching quantities in four soil types, the RSD was less than 9.2%, showing good stability of the method, which can be applied to determine the residue of Broflanilide in different soils.