Colorimetric Determination of Formaldehyde Using 1, 3-Diphenyl-2-thiohydantoin and Sodium Hydroxide

A method for the determination of formaldehyde concentration in water is described. It is based on a coupling reaction of 1, 3-diphenyl-2-thiohydantoin with formaldehyde. In this reaction an anionic pigment is formed by addition of sodium hydroxide solution. The color intensity and formaldehyde conc...

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Veröffentlicht in:	Analytical Sciences 1985, Vol.1(2), pp.181-184
Hauptverfasser:	TAKAYANAGI, Miyuki, MORISHIMA, Yasuo, GOTO, Shoji, HASEGAWA, Iwazo, FUKUDA, Tsuneo, USAMI, Masashi, NAITO, Toshiko, YASHIRO, Tamotsu
Format:	Artikel
Sprache:	eng
Schlagworte:	1,3-diphenyl-2-thiohydantoin Analytical chemistry anionic pigment Chemistry Exact sciences and technology Formaldehyde Spectrometric and optical methods spectrophotometry
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Beschreibung
Zusammenfassung:	A method for the determination of formaldehyde concentration in water is described. It is based on a coupling reaction of 1, 3-diphenyl-2-thiohydantoin with formaldehyde. In this reaction an anionic pigment is formed by addition of sodium hydroxide solution. The color intensity and formaldehyde concentrations were linearly related in the range up too 100μM. The minimum detectable concentration was 2μM. The precision (R.S.D.) was 3.62%.
ISSN:	0910-6340 1348-2246
DOI:	10.2116/analsci.1.181