GB/T 5750.11-2006
Standard examination methods for drinking water Disinfectants parameters (English Version)

Standard No.

GB/T 5750.11-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2023-10

Replace By

GB/T 5750.11-2023

Latest

GB/T 5750.11-2023

Replace

GB/T 5750-1985

Scope

This standard specifies the use of N,N-diethyl-p-phenylenediamine (DPD) spectrophotometric method for the determination of free residual chlorine in drinking water and its source water. This method is applicable to the determination of free residual chlorine and various forms of combined residual chlorine in domestic drinking water and its source water after chlorination disinfection. The minimum detection mass of this method is 0.1μg, if 10mL water sample is taken for determination, the minimum detection mass concentration is 0.01mg/L. High concentrations of monochloramine interfere with the determination of free residual chlorine, and arsenite or thioacetamide can be used to control the reaction to remove the interference. The interference of manganese oxide can be deducted by making water sample blank. Chromate interference can be eliminated with thioacetamide.

GB/T 5750.11-2006 history

• 2023 GB/T 5750.1-2023 Standard test methods for drinking water - Part 1: General
• 2006 GB/T 5750.1-2006 Standard examination methods for drinking water.General priciples
• 1985 GB/T 5750-1985 Standard examination methods for drinking water

GB/T 5750.11-2006 Standard examination methods for drinking water Disinfectants parameters has been changed from GB/T 5750-1985 Standard examination methods for drinking water.

GB/T 5750.11-2006 -All Parts