ASTM D 1126 Standard Test Method for Hardness in Water
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ASTM D 1126 Document Information:
Title
Standard Test Method for Hardness in Water
ASTM International
Publication Date:
May 10, 2002
Scope:
This test method covers the determination of hardness in water
by titration. This test method is applicable to waters that are
clear in appearance and free of chemicals that will complex calcium
or magnesium. The lower detection limit of this test method is
approximately 2 to 5 mg/L as CaCO3; the upper limit can
be extended to all concentrations by sample dilution. It is
possible to differentiate between hardness due to calcium ions and
that due to magnesium ions by this test method.
This test method was tested on reagent water only. It is the
user's responsibility to ensure the validity of the test method for
waters of untested matrices.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- analysis
- calcium carbonate hardness
- hardness
- titration
- water
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