GB/T 5750.11-2006

This standard replaces the residual chlorine in Part II of GB/T 5750-1985 "Standard Test Method for Living Drinking Water". The main changes compared with GB/T 5750-1985 are as follows: — The structure has been adjusted in accordance with GB/T 1.1-2000 "Guide for Standardization Work - Part 1: Structure and Writing Rules for Standards" and GB/T 20001.4-2001 "Rules for Standard Writing - Part 4: Chemical Analysis Methods"; — The units of measurement have been modified in accordance with the requirements of national standards; — The equivalent concentration has been changed to molar concentration (the equivalent concentration is still retained in the oxidation-reduction section); — The symbol for mass concentration has been changed from C to ρ, and the symbol for content has been changed from M to m; — Eleven test methods for five indicators of chlorine disinfectants in living drinking water, including effective chlorine, chloramine, chlorine dioxide, ozone, and chlorate, have been added.