How to estimate hardness for high saline or brine waters?

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J. C. Tarafdar

@ Anand, beside EDTA method you can use gravemetric analysis and atomic absorption method. But EDTA method is the most inexpensive and simple.

Anand Theivasigamani

Thank you sir

Hussen Ebrahim

The hardness of water is defined as its content of metallic ions which react with sodium soaps to produce a residue. It can be expressed as the total concentration of Calcium and Magnesium in ppm.