GB/T 6909-2008
Analysis of water used in boiler and cooling system.Determination of hardness (English Version)
- Standard No.
- GB/T 6909-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2019-01
- Replace By
- GB/T 6909-2018
- Latest
- GB/T 6909-2018
- Replace
- GB/T 6909.1-1986
- Scope
- This standard is applicable to the determination of the hardness of natural water, cooling water, demineralized water, H-type cation exchanger effluent, and boiler feed water samples. When chrome black T is used as the indicator, the hardness measurement range is 0.1mmol/L～5mmol/L. When the hardness exceeds 5mmol/L, the sampling volume can be appropriately reduced and diluted to 100ml for measurement. When acid chrome blue K is used as the indicator , the hardness measurement range is 1μmol/L～100μmol/L.
GB/T 6909-2008 Referenced Document
- GB/T 601 Chemical reagent.Preparations of reference titration solutions*， 2016-10-13 Update
- GB/T 603 Preparation of preparations and products used in chemical reagent test methods*， 2023-08-06 Update
- GB/T 6682 Water for analytical laboratory use.Specification and test methods*， 2008-05-15 Update
GB/T 6909-2008 history
- 2018 GB/T 6909-2018 Analysis of water used in boiler and cooling system.Determination of hardness
- 2008 GB/T 6909-2008 Analysis of water used in boiler and cooling system.Determination of hardness
- 1986 GB/T 6909.1-1986 Methods for analysis of water for boiler and for cooling--The determination of hardness--High hardness
