GB/T 14420-2014 (English Version) PDF

Standard No.: GB/T 14420-2014
Language: Chinese, Available in English version
Release Date: 2014
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 14420-2014
Replace: GB/T 14420-1993

Scope: This standard specifies the method for determining the chemical oxygen demand in boiler water and cooling water—potassium dichromate rapid method. The volumetric method in this standard is suitable for the determination of chemical oxygen demand in water samples such as natural water, furnace water, demineralized water, and industrial circulating cooling water. The measurement range is 0 mg/L~50 mg/L (calculated as oxygen), Water samples with a concentration greater than 50 mg/L should be diluted before determination; the spectrophotometric method in this standard is suitable for the determination of chemical oxygen demand in water samples such as surface water, groundwater, domestic sewage and industrial wastewater, and the determination range is 50 mg/L. L~1 000 mg/L (calculated as oxygen), the concentration of chloride ion shall not be greater than 1 000 mg/L, and water samples with a concentration greater than 1 000 mg/L or a chloride ion content greater than 1 000 mg/L should be diluted before determination.

GB/T 14420-2014 Referenced Document

GB/T 6682-2008 Water for analytical laboratory use.Specification and test methods

2014 GB/T 14420-2014 Analysis of water used in boiler and cooling system.Determination of chemical oxygen demand.Rapid method with potassium dichromate
1993 GB/T 14420-1993 Analysis of water used in boiler and cooling system. Determination of chemical oxygen demand. Rapid method with potassium dichromate