After the sample is extracted with acetonitrile and purified by dispersive solid-phase extraction (samples with high oil content must be frozen and degreased first), it is measured with a liquid chromatography-mass spectrometer/mass spectrometer and quantified by an external standard method.
T/SDAQI 008-2021 history
2021T/SDAQI 008-2021 Determination of metrafenone residue in foods