GB/T 20466-2006
Active
T/BHES 1-2022
Active
Group standards
T/BHES 1-2022 Water quality determination of total hardness and calcium magnesium using automatic potentiometric titration method
T/BHES 1-2022 Water quality determination of total hardness and calcium magnesium using automatic potentiometric titration method
Price:
$ 26.00
Basic Information
Standard Code:
T/BHES 1-2022
Standard Type:
Group standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Analysis methods for toxic substances in water environments
ICS Name:
\nChemical testing of water
Publish Date:
2022-12-30
Implement Date:
2023-04-01
Pages:
16 pages
Scope
This document specifies the method for determining the total hardness, calcium, and magnesium in water by automatic potentiometric titration. This document is applicable to the determination of total hardness, calcium, and magnesium in surface water, groundwater, drinking water, and wastewater. The detection limits and measurement ranges of the two-step titration method and the continuous titration method are the same. When the sampling volume is 50 mL, the detection limit of total hardness is 2.5 mg/L, and the measurement range is 10.0 mg/L to 360 mg/L; the detection limit of calcium is 1.0 mg/L, and the measurement range is 4.0 mg/L to 150 mg/L; the detection limit of magnesium is 0.5 mg/L, and the measurement range is 2.0 mg/L to 90.0 mg/L.
Development Information
Referenced Standards
GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods
GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods
GB/T 8170-1987 Rules for rounding off of numberical values
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
JJG 814-2015 Automatic Potentiometric Titrators
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