Discussion on the Determination Method of the Content of Alkyl Sulfate Containing Short Carbon Chain
The national standard GB/T5173-2022 stipulates the specific method of direct two-phase titration for the determination of alkyl sulfate active substance,but it is found that the deviation of active substance becomes larger and larger as the hydrophobic carbon chain becomes shorter and shorter.In order to solve this problem,based on the determination of anionic surfactant active substance content according to GB/T15963 and GB/T20200,a series of different carbon chain alkyl sulfate samples were determined by changing the removal amount,solvent type,solvent amount and other factors,and the material balance in the production process was compared.Therefore,a method suitable for the determination of surfactants containing short carbon chain alkyl sulfate anions was selected.The results show that the deviation of determination results gradually tends to be the same as the alkyl sulfate hydrophobic chain becomes shorter and shorter by solvent increment contrast method.Finally,experimental method 8 is determined to determine the content of anionic surfactant active substance containing octylsulfate.This study has important practical significance for production guidance,quality control and index adjustment.
short carbon chain alkyl sulfatedetermination of active substance contentanionic surfactant activedirect two-phase titrationsolvent incremental contrast method
NETL
NSTL
万方数据
