HG/T 5142-2016 "Determination of linear alkylbenzene sulfonates in Spinning & weaving dyeing and finishing aids" specifies a method for the determination of the content of four linear alkylbenzene sulfonates (C10, C11, C12, C13 LAS) in Spinning & weaving dyeing and finishing aids using High Performance Liquid Chromatograph (HPLC) and liquid chromatograph-Tandom mass spectrometer (LC-MS/MS). This standard applies to the qualitative and quantitative analysis of linear alkylbenzene sulfonates in Spinning & weaving dyeing and finishing aids products. Determination is carried out by HPLC or LC-MS/MS techniques by dissolving samples, organic membrane filtrate and standard material alignment. This method can accurately evaluate the content of target ingredients in products, providing a scientific basis for quality control and Product Research & Development.