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Title: Unified standard substance for the photometric determination of aromatic amines and isocyanates

Abstract

In the determination of aromatic amines and isocyanates in solutions, air, washings from the skin, and extracts from uniforms, the compounds themselves are used as standard substances. The necessity of laborious purification of isocyanates and amines which are carcinogenic (benzidine, 2-naphthylamine, 2,4-toluidine) or are suspected of carcinogenicity (1-naphthylamine, toluidines, toluylenediamines, nitroanilines, and others) complicates the analysis and increases the sanitation hazard. The authors have suggested that noncarcinogenic (for humans) aniline (All-Union State Standard 5819-79) be used as the unified standard substance. The reaction of condensation with p-dimethylaminobenzaldehyde in acetic acid solution is used to determine the substances. The aniline fraction boiling in the range 184-185/sup 0/C is used. The reaction with p-dimethylaminobenzaldehyde is conducted directly or after centrifugation of the sample. As a result of hydrolysis, isocyanates break down to the corresponding aromatic amines.

Authors:
; ;
Publication Date:
Research Org.:
Institute of Labor Hygiene and Occupational Diseases, Gor'kii (USSR)
OSTI Identifier:
7166084
Resource Type:
Journal Article
Journal Name:
Ind. Lab. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 53:4; Other Information: Translated from Zavod. Lab.; 53: No. 4, 6-8(Apr 1987)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMINES; CALIBRATION STANDARDS; PHOTOMETRY; ANILINE; SENSITIVITY; AROMATICS; CARCINOGENS; ISOCYANATES; CALIBRATION; PHOTOMETERS; RESOLUTION; TOXIC MATERIALS; TOXICITY; MATERIALS; MEASURING INSTRUMENTS; ORGANIC COMPOUNDS; STANDARDS; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989); 520200 - Environment, Aquatic- Chemicals Monitoring & Transport- (-1989); 400102 - Chemical & Spectral Procedures

Citation Formats

Belyakov, A A, Mel'nikova, L V, and Kurenko, L T. Unified standard substance for the photometric determination of aromatic amines and isocyanates. United States: N. p., 1987. Web.
Belyakov, A A, Mel'nikova, L V, & Kurenko, L T. Unified standard substance for the photometric determination of aromatic amines and isocyanates. United States.
Belyakov, A A, Mel'nikova, L V, and Kurenko, L T. Thu . "Unified standard substance for the photometric determination of aromatic amines and isocyanates". United States.
@article{osti_7166084,
title = {Unified standard substance for the photometric determination of aromatic amines and isocyanates},
author = {Belyakov, A A and Mel'nikova, L V and Kurenko, L T},
abstractNote = {In the determination of aromatic amines and isocyanates in solutions, air, washings from the skin, and extracts from uniforms, the compounds themselves are used as standard substances. The necessity of laborious purification of isocyanates and amines which are carcinogenic (benzidine, 2-naphthylamine, 2,4-toluidine) or are suspected of carcinogenicity (1-naphthylamine, toluidines, toluylenediamines, nitroanilines, and others) complicates the analysis and increases the sanitation hazard. The authors have suggested that noncarcinogenic (for humans) aniline (All-Union State Standard 5819-79) be used as the unified standard substance. The reaction of condensation with p-dimethylaminobenzaldehyde in acetic acid solution is used to determine the substances. The aniline fraction boiling in the range 184-185/sup 0/C is used. The reaction with p-dimethylaminobenzaldehyde is conducted directly or after centrifugation of the sample. As a result of hydrolysis, isocyanates break down to the corresponding aromatic amines.},
doi = {},
url = {https://www.osti.gov/biblio/7166084}, journal = {Ind. Lab. (Engl. Transl.); (United States)},
number = ,
volume = 53:4,
place = {United States},
year = {1987},
month = {10}
}