SN/T 1045.2-2010 Determination of prohibited azo dyestuff in import and export dyed Spinning & weaving products and leather products, Part 2: Gas chromatograph/Mass spectrometry The standard specifies the method for the determination of prohibited azo dyestuff in dyed Spinning & weaving products and leather products using gas chromatograph-mass spectrometry. The standard is used to detect and analyze the possible presence of harmful azo dyestuff in these products to ensure that import and export products comply with international environmental protection and safety standards.