Method for extracting and detecting flubendiamide residues in rice field environment

The invention discloses a method for extracting and detecting flubendiamide residues in a rice field environment. The method comprises the following steps of collecting and extracting samples, namely respectively collecting samples in the rice field environment, then mixing the samples with an extracting agent, carrying out vortex extraction to obtain an extracting solution of the samples, then carrying out water removal and first centrifugation on the extracting solution, taking a first supernatant, mixing with a purifying agent for purification, carrying out secondary centrifugation, collecting the second supernate, and filtering to obtain a solution to be detected; preparing a standard solution; utilizing an ultra-high performance liquid chromatography-high resolution time-of-flight mass spectrometry (UHPLC-ESI-QTOF-MS) to detect. The method can be used for efficiently extracting the residue of flubendiamide in the rice field environment (rice field water, rice field soil, rice plants, rice and rice husks)