"SN/T 4574-2016 Determination of 2,4-dinitro toluene in Coatings and inks, gas chromatograph - Mass spectrometry" specifies the use of gas chromatograph - Mass spectrometry (GC-MS) to determine the content of 2,4-dinitro toluene in Coatings and inks. This standard applies to the determination of samples after shaking in a diaminomethane organic solvent or ultrasonic extraction, after being filtrated by a microporous filter membrane. The detection limit of the method is 20 mg/kg. The standard details the steps of Sample Handling, Instrument Operation and Data Analysis to ensure the accuracy and Reliability of the measurement results. The personnel using this standard must have practical experience in formal laboratory work and must take appropriate safety and health measures to ensure compliance with relevant national safety regulations.