Dear,

Determination of total hardness and calcium hardness will give the things; and calculation method also there for the quantification of magnesium and calcium in it too. for the magnesium quantification calculation method is there.

3500-Mg B. Calculation Method (APHA) Standard methodologies; go through that method.

all the very best

Dear Anila,

Magnesium hardness = Total hardness - Calcium hardness

The best way to measure [Mg2+] from hardness in a simple way is to use the HACH kit no. 8030, see at:

http://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCQQFjAAahUKEwi4rOem7-7HAhUKtBoKHWJ4D60&url=http%3A%2F%2Fwww.hach.com%2Fasset-get.download.jsa%3Fid%3D7639983714&usg=AFQjCNFLLVZo8A1VGqSFZoYG-STbsDvIGA

Good luck, Jan

Thank you for the answers. What I really wanted was, conversion factor for Magnesium Hardness to Magnesium.