Oilfield Glossary
Oilfield Glossary
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magnesium test

1. n. [Drilling Fluids]
A procedure for determining magnesium ion (Mg+2) concentration in a water-base drilling fluid based upon analyses for both calcium and total hardness. The standard test has been proscribed by API. Magnesium ion (Mg+2) concentration is calculated by subtracting calcium (Ca+2) analysis results from total hardness analysis results.