| 摘要 |
<p>A method and reagent for the colorimetric determination of magnesium in a fluid. The method comprises contacting a sample of the fluid with the reagent comprising the metallochromic dye substance, 2-(4,5-dihydroxy-2,7-disulpho-3-naphthylazo)benzene-arsonic acid [Arsenoazo I], together with a selective complexing agent for removing interfering cations, particularly calcium ions and determining the formation of a magnesium-dye complex. A device for use in the method, comprising the reagent deposited on or impregnated into a solid support or carrier is also disclosed.</p> |
