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By means of suitable chemical reactions, formaldehyde is obtained from 1,2-diols, hexitols, primary alpha-amino alcohols, 2-nitro-1-hydroxy aliphatic compounds, the methylene group in R-CH=CH(2) and 17-ketolsteroids, and converted into a dihydrolutidine derivative which is then determined by fluorimetry. The formation of dihydro-pyridine derivatives also allows the fluorimetric determination of primary alkylamines, nitriles and aliphatic aldehydes. Aldehydes with an alpha-methylene group and 2-deoxysugars can be determined by forming fluorescent quinaldines. The fluorescent compound obtained by condensing glyoxylic acid with resorcinol allows the determination of alpha,beta-dihydroxy and hexuronic acids after a periodate oxidation. The fluorimetric determination of phenols is achieved by converting them into coumarins.
Pesez
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Centre de Recherches Roussel-Uclaf, 93-Romainville, France.
Bartos
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