This standard specifies methods for the determination of carbendazim in Coatings by Liquid chromatography, LC (LC) and liquid chromatograph-mass spectrometry/mass spectrometry (LC-MS/MS). It is suitable for the detection of carbendazim in Coatings and film raw materials. The standard describes the extraction, detection and quantification process of carbendazim, which ensures the accuracy and Reliability of the analysis. The use of methanol as the extraction solvent, combined with ultrasonic extraction and centrifugation technology, improved the Accuracy of the determination and provided standardized operation guidelines for related experiments.