Topic
Color reaction
About: Color reaction is a research topic. Over the lifetime, 1194 publications have been published within this topic receiving 19579 citations.
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TL;DR: In this article, a non-aqueous spectrophotometric method was described for the determination of citric acid in the presence of carboxylic acids and lactic acid.
10 citations
TL;DR: In this paper, a spectrophotometric study of the interference of bromide in the ferric chloride reaction for cholesterol has been conducted and the interference has been shown to be primarily an enhancement of the color reaction and secondarily an additive color owing to a change in the spectrum of the reagent blank.
10 citations
TL;DR: In this article, a 2-hydroxy-3-napthoic acid (2H3N) is presented as a new, highly sensitive and selective reagent for its color reaction with ferric ion.
10 citations
10 citations
TL;DR: A highly sensitive method is described for the spectrophotometric determination of Be in the range 0.01 to 7 ppm and the stability, sensitivity, and freedom from interference of the proposed method compare favorably with those of standard methods now in use.
Abstract: A highly sensitive method is described for the spectrophotometric determination of Be in the range 0.01 to 7 ppm. The color reaction between the reagent Fast Sulphon Black F and Be is specific at pH 11 to 11.2 in the presence of EDTA and KCN among some 25 cations examined. Fluoride, citrate, and tartrate do not interfere and a 10-fold amount of phosphate can be tolerated. The only cations that tend to interfere are chromium(III) and tin(II), and these can be rendered harmless by previous oxidation to their higher valency forms. The stability, sensitivity, and freedom from interference of the proposed method compare favorably with those of standard methods now in use. (auth)
10 citations