GB/T 7493-1987 is a water quality testing standard. Spectrophotometric method, spectrophotometry is used to determine the content of nitrite nitrogen in water. Nitrite nitrogen is widely present in water bodies, and its content is an important indicator to measure the degree of water pollution. Excessive levels can threaten human health. The standard specifies the complete process from sample collection and processing, to the use of specific reagents to react with nitrite nitrogen for color development, and then to determine the content by spectrophotometer measurement Absorbance. The method is standardized and accurate. It is suitable for all kinds of water samples, providing strong technical support for water quality monitoring and water 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 |
