This standard specifies the method for the determination of inorganic sulfate content in surfactants. This standard applies to anionic surfactants containing sodium sulfate, ammonium sulfate, alkanolamines, and sulfates. This standard does not apply to products containing other compounds that form sparingly soluble lead salts under the test conditions, such as phosphates or large amounts of chloride, nor does it apply to products containing large amounts of weak salts (such as soap or butyl salts) that will prevent pH adjustment. Diacid monoester sulfonate) products.
GB/T 6366-2012 Referenced Document
GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions