NIOSHTIC-2 Publications Search

NIOSH Manual of Analytical Methods-Part I NIOSH Monitoring Methods.

Authors
Anonymous
Source
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, 1977 Apr; 1:141-142
Link
NIOSHTIC No.
00108937
Abstract
The NIOSH analytical method for determining toluene-diisocyanate (26471625) (TDI) in air is described. TDI is hydrolyzed to the corresponding toluenediamine derivative which is then diazotized by a sodium-nitrite and sodium-bromide solution. The diazo compound is reacted with N-(1-naphthyl)-ethylenediamine to form a color complex that is analyzed colormetrically at 550 nanometers. The analytical range of the method is 0.007 to 0.14 parts per million. Free aromatic amines will interfere with the analysis.
Keywords
Air-contamination; Air-sampling; Isocyanates; Analytical-methods; Diazo-compounds; Colorimetry;
CAS No.
26471-62-5;
Publication Date
19770401
Fiscal Year
1977
Identifying No.
DHEW (NIOSH) Publication No. 77-157
Source Name
National Institute for Occupational Safety and Health
State
OH;
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division