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Biomedical subjects

N Bonev

Publications and source records attributed to N Bonev.

4 recordsLinked to original sources
PubMed1995

[The personal exposure of workers in the manufacture of xylenes--in Burgas (the Neftokhim firm)].

Individual exposures were qualitatively and quantitatively characterized for "Xylols" manufacturing workers. To this end, air sampling was performed from the breathing zones of workers occupied at varying jobs, covering a representative group of 29 subjects; for comparison, 17 stationary samples were taken from work-places at the same facility. A gas chromatographic procedure specially developed for the purpose was used for identification and quantitative analysis of the substances recovered. Fatty and aromatic hydrocarbons were found to be the principal pollutants of the occupational atmosphere. The leading pollutant proved to be benzene, by virtue of its high toxicity and relatively high levels (around and above its MAC).

Adsorption↗
PubMed1988

[A spectrophotometric method for determining n-butanol].

The method for determination of n-butanol is based on its reaction with phloroglucinol in phosphoric acid media until receiving colour compound and followed by photometric measurements at 455 nm. The specificity of the reaction is studied concerning the n-butanol in the presence of about 15 other organic substances. The reaction is optimized after the method of Jouden.

1-Butanol↗
PubMed1977

[Methods of taking alcohol samples on solid adsorbents].

The effect of silicagel porosity on the adsorptional and desorptional qualities of alcohol is investigated in the course of detecting alcohols in the working environment air. Large porous silicagels, inured at 600 degrees, yield optimal 95 per cent desorption water at sample stay exeeding 2 hrs. A method of taking alcohol samples from the air of the working environment, using 10 cm glass tube filled with two layers silicagel, is developed and introduced in practice.

Adsorption↗