Research on universal detection methods for azo dyes in textiles and leather
By research the detection standards of azo dyes for leather and textiles,the influences of different degreasing procedures,extraction solvents,evaporation temperatures and constant volume solvents on the detection re-sults were discussed,and the detection conditions were defined to establish a general detection method suitable for leather and textiles at the same time to improve the detection accuracy and efficiency.The effects of different degreasing procedures,extraction solvents,rotary evaporation temperatures and constant volume solvents on the detection results were studied,and the detection conditions were clarified.The results showed that the optimal detection conditions were 40ml of n-hexane,ultrasonic degreasing for 40 minutes,tert-butyl methyl ether as the extraction solvent,rotary evaporation in 48 water bath to nearly dry,and dissolution with tert-butyl methyl ether for constant volume.Both leather samples and textile samples under this method can get good recovery rate.The method is simple and efficient,and meets the requirements of international and domestic standards.
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