Abstract
Summary
1. A method is described for determination of magnesium in blood serum using the azo dye Chrome Fast Blue BG. 2. Use of this dye affords immediate determination of serum magnesium without removal of calcium and with no addition of stabilizers. 3. The dye as used here is sensitive to as little as .01 microequivalent of magnesium. 4. Thirty-seven sera were analyzed. These had an over-all magnesium-content of 1.73 meq/l of sera.
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