[Photometric and chromatographic methods of measuring the concentration of acelysin in the air of a work area]. / Fotometricheskii i khromatograficheskii sposoby izmereniia kontsentratsii atselizina v vozdukhe rabochei zony.

Two methods were applied to evaluation of acelysine level. Spectrophotometric one was based on reaction with p-nitrophenyldiasonium and evaluation of the product optic density at 510 nm. The second was chromatography in thin layer, where a mixture of n-butanol, formic acid and water was used as an eluent and 0.2% ninhydrin solution in butanol and 3 ml of ice acetic acid (60-70 degrees C) served as a developer. Both methods are supposed to evaluate acelysine level in the air of working area, when a half of MAC and admixtures are present.

[The use of a thin-layer chromatographic method for measuring the concentrations of mixtures of the dyes scarlet 2G and black 2K in the air of a work area]. / Primenenie metoda tonkosloinoi khromatografii dlia izmereniia kontsentratsii smesei krasitelei alogo 2Zh i chernogo 2K v vozhuke rabochei zony.

Scarlet 2G and black 2K dyes were divided and measured by thin-layer chromatography with mixture of acetone and toluene (3:4) used as an eluent for dividing scarlet 2G and a mixture of chloroform, benzene and acetone (3:2:1) for eluting black 2K. The method permits the detection of the aforesaid dyes in the air of working area at the level of 0.5 MAC in the presence of admixtures.