HG/T 5852-2021 "Spinning & weaving dyeing and finishing aids, determination of triclosan and triclocarban" specifies the method for the determination of triclocarban and triclocarban in Spinning & weaving dyeing and finishing aids. This standard applies to all kinds of Spinning & weaving dyeing and finishing aids. The target substance in the sample is extracted by methanol ultrasound, and the liquid phase chromatograph-tandem Mass spectrometry is used for quantitative analysis. The standard requires the use of analytically pure reagents and water quality in accordance with GB/T 6682, and quotes the provisions of GB/T 6682 and GB/T 8170 on test water quality and numerical revision. These methods and requirements ensure the accuracy and comparability of test results and are suitable for quality control and product conformity assessment.