Papers
More filters
TL;DR: In this article, a method for the micro-estimation of zinc by means of quinaldinic acid in the presence of copper, silver or mercury individually, or in the case of both silver and mercury, is described.
Abstract: A method for the micro-estimation of zinc by means of quinaldinic acid in the presence of copper, silver or mercury individually, or in the presence of both silver and mercury, is described. It depends upon the use of thiourea for masking the reaction of copper, mercury and silver ions with which it forms stable complexes in acid solution. In the case, where copper is present, a previous addition of sodium bisulphite is necessary to reduce the cupric to cuprous ion. Zinc is precipitated as usual in acetic acid solution by the addition of sodium quinaldinate.
10 citations
9 citations
Cited by
More filters
41 citations
13 citations
10 citations
TL;DR: Quinoxaline-2-carboxylic acid and 3-chloro and 3hydroxy derivatives have been studied as analytical reagents and the solubility products of the metal salts, the optimum pH range for complete precipitation and the thermal behaviours of metal complexes have been established as mentioned in this paper.
9 citations
TL;DR: Etude pH-metrique de l'acide quinaldique as mentioned in this paper, Ka = 1,2 · 10−5, qH/Q−1 = 1.2
Abstract: Etude pH-metrique de l'acide quinaldique. Determination de la constante du couple acide/base (QH/Q−1), Ka = 1,2 · 10−5.
7 citations