Rapid quantitative determination of trimethylamine using steam distillation

A simple, rapid and inexpensive method is proposed for determination of trimethylamine (TMA) in fish muscle. This procedure includes a deproteinization step with trichloroacetic acid (TCA) followed by blocking of primary and secondary amines using formaldehyde at alkaline pH and finally steam distil...

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Veröffentlicht in:	Journal of food protection 1987-09, Vol.50 (9), p.756-760
Hauptverfasser:	MALLE, P, TAO, S. H
Format:	Artikel
Sprache:	eng
Schlagworte:	aminas amine amines analisis analyse analysis Biological and medical sciences colorimetria colorimetrie colorimetry destilacion distillation distilling fish Fish and seafood industries Food industries formaldehidos formaldehyde Fundamental and applied biological sciences. Psychology pescado poisson aliment
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Beschreibung
Zusammenfassung:	A simple, rapid and inexpensive method is proposed for determination of trimethylamine (TMA) in fish muscle. This procedure includes a deproteinization step with trichloroacetic acid (TCA) followed by blocking of primary and secondary amines using formaldehyde at alkaline pH and finally steam distillation of TMA. No statistically significant differences were found between this new optimized procedure and either the Conway microdiffusion method or the colorimetric method. Using the technique proposed here it is possible to assay both the total volatile basic nitrogen (TVBN) and the TMA in less than 30 min.
ISSN:	0362-028X 1944-9097
DOI:	10.4315/0362-028X-50.9.756