Calcium and magnesium ions in water are sequestered by the addition of disodium ethylenediamine tetraacetate. The end point of the reaction is detected by. Revision: Edition, December 1, ; Published Date: December 1, ; Status: Active, Most Current; Document Language: Published By: ASTM. Find the most up-to-date version of ASTM D at Engineering

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This test method is applicable to waters that are clear in appearance and free of chemicals that will complex calcium or magnesium.

Standard – Standard Test Method for Hardness in Water ASTM D –

It is possible to differentiate between hardness due to x1126 ions and that due to magnesium ions by this test method. It is the user’s responsibility to ensure the validity of the test method for waters of untested matrices. No other units of measurement are included in this standard.

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ASTM D – 17 Standard Test Method for Hardness in Water

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Standard Test Method for Hardness in Water

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