This document describes methods for the determination of orthophosphate, total inorganic phosphate, and total phosphate content in water used in boiler and cooling system: ammonium molybdate spectrophotometric method and continuous flow- ammonium molybdate spectrophotometric method. This document applies to the determination of orthophosphate, total inorganic phosphate, and total phosphate content in water used in boiler and cooling system. The measurement range of the ammonium molybdate spectrophotometric method is 0.05 mg/L ~ 50 mg/L (based on PO43-); the measurement range of the continuous flow- ammonium molybdate spectrophotometric method is 0.1 mg/L ~ 50 mg/L (based on PO43-).
Basic Data
Standard ID
GB/T 6913-2023 (GB/T6913-2023)
Description (Translated English)
Analysis of water used in boiler and cooling system - Determination of phosphate
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
G76
Classification of International Standard
71.040.40
Word Count Estimation
14,167
Date of Issue
2023-03-17
Date of Implementation
2023-10-01
Older Standard (superseded by this standard)
GB/T 6913-2008
Issuing agency(ies)
State Administration for Market Regulation, China National Standardization Administration
