David Goldstein

TL;DR: It was found that glyoxal bis[2-hydroxy-anil] is a sensitive reagent for calcium, and the test described is specially suited to detect calcium oxide in a mixture of other colouries oxides, as well as to detectcium in pharmaceutical preparations.

TL;DR: In this article, the Rhodamininvcrbindung of Thallium(III) and rhodamine-chlorure (Rhodamine B) is used to decelerate 0.03 γ Tl dans 500 ml d'eau.

TL;DR: Glyoxal bis-(2-hydroxy-anil) is proposed as a new indicator for the complexoemetric titration of calcium as discussed by the authors, which is indicated by a sharp change from pink to yellow.