GB/T 7494-1987 is a standard in the field of water quality testing. The methylene blue Spectrophotometric method, spectra-trophotometry is used to determine the content of anion surfactants in water. Anion surfactants are widely found in domestic sewage and industrial wastewater, and their content is related to water quality and ecological safety. The standard specifies the whole process from sample collection, pretreatment to coloration with methylene blue reagent, and then the spectrophotometer measurement Absorbance to calculate the content. The method has standardized operation and reliable results. It is suitable for all kinds of water detection, providing key technical support for water quality monitoring and pollution prevention and control.
| Status | Active | ||
|---|---|---|---|
| CCS | Z16 | ICS | 13.060 |
| Release Date | 1987-03-06 00:00:00 | Implementation Date | 1987-08-01 00:00:00 |
