Determination of micro-quantities of magnesium.

Abstract

To 25 ml or less of a neutral sample (containing up to 20 gamma Mg) in a 150ml separating funnel, 10 ml tartrate solution, 10 ml boric-acid buffer and 5 ml Na diethyldithiocarbamate are added and the solution made up to 50 ml. After extracting with 25 ml chloroform and discarding the organic phase the water phase is rinsed with about 10 ml chloroform and the organic phase again discarded. 10 ml of masking agent, 1 ml n-butylamine and 10 ml extracting solution (8-hydroxyquinoline in chloroform) are then added. After shaking and separating the organic phase a knife point of Na₂SO₄ is added and the extinction of the samples and that of a l0 gamma Mg standard are measured against a simultaneously treated reagent blank at 380 nm. (Abstract retrieved from CAB Abstracts by CABI’s permission)