HJ 1226-2021 Active Industry standards-Environmental protection

HJ 1226-2021 HJ 1226-2021 Water quality - Determination of sulfide. Methane blue spectrophotometric method

Publish Date: 2021-12-16 Implement Date: 2022-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: HJ 1226-2021

Standard Type: Industry standards

Standard Status: Active

is_force_gb: no

CCS Name: Environmental protection

ICS Name: Environmental protection, health, and safety (vocabulary)

Publish Date: 2021-12-16

Implement Date: 2022-03-01

Scope

This standard specifies the methylene blue spectrophotometric method for determining sulfides in water. This standard is applicable to the determination of sulfides in surface water, groundwater, domestic wastewater, industrial wastewater, and seawater. When the sampling volume is 200 ml and a 10 mm optical path cuvette is used, the method's detection limit is 0.01 mg/L, and the determination limit is 0.04 mg/L; when a 30 mm optical path cuvette is used, the method's detection limit is 0.003 mg/L, and the determination limit is 0.012 mg/L. Note: The 30 mm optical path cuvette is only used for the determination of sulfides in groundwater or low-concentration seawater that meets or exceeds the first-class standard. The pretreatment method should be the "acidification-distillation-absorption" method.