Barium chloride dihydrate (min. 99%) was purchased from Riedel-de Haёn and used as received. The silica source was a commercial sodium silicate solution (so-called water glass) containing about 12.5 wt% SiO2 and 13.8 wt% Na, as supplied by Sigma-Aldrich (reagent grade). All solvents employed for the spectroscopic measurements were of UV spectroscopic grade (Aldrich). Stock solutions (0.1 and 1 ...

A method has been developed for the quantitative determination of traces of chloramine T (Activin, Halamid) in dairy products. Proteins are removed and the hydrolysis product toluene-4-sulphonamide is extracted with ether. After evaporation of the solvent, the residue is oxidized with an alkaline potassium permanganate solution. The oxidized product is isolated by ether extraction and the resid...

TiTHE PHYSIOLOGIC and pathologic consequences of magnesium deficit or excess iii animals, and the important role of magnesium as a cofactor in many enzyme systems have been well recognized. However, knowledge concerning the role of magnesium in human disease has lagged behind that of sodium and potassium. This has been, in part, due to the fact that methods for the determination of magnesium in...