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Development of Continuous Isocyanates Monitor.


PB93119220

Publication Date 1992
Personal Author Hyatt, D. E.
Page Count 46
Abstract The main purpose of the project was to demonstrate the technical feasibility of an innovative chemiluminescent technique for the selective detection of isocyanate species in air at levels as low as 0.02 parts per million (ppm). The analysis was based on the generation of a reactive stream of oxygen atoms which is then combined with the air stream being sampled to produce activated CNO species from any isocyanates present. The activated CNO species then decay to ground state species with the emission of light which is detected and quantified as a measure of the amount of isocyanate in the original air sample. The monitor provided nonspecific analysis of isocyanate species and therefore served as a total isocyanates monitor rather than as a monitor of individual isocyanate species in air. The preferred source of reactive oxygen for the monitor was high purity oxygen, rather than the originally proposed room air. Chemical interferant effects were minimal for typical organic compounds including aromatic hydrocarbons, alcohols, and ketones and inorganic species.
Keywords
  • Continuous sampling
  • Isocyanates
  • Air pollution monitors
  • Occupational safety and health
  • Chemiluminescence
  • Design criteria
  • Performance evaluation
  • Threshold detectors
  • Occupational exposure
  • Indoor air pollution
  • Concentration(Composition)
  • Molecular energy levels
  • Toluene diisocyanate
  • CAS 584-84-9
  • Threshold Limit Value
Source Agency
  • National Institute for Occupational Safety and Health
NTIS Subject Category
  • 68A - Air Pollution & Control
  • 68G - Environmental Health & Safety
  • 57U - Public Health & Industrial Medicine
  • 99F - Physical & Theoretical Chemistry
Corporate Authors ADA Technologies, Inc., Englewood, CO.; Centers for Disease Control, Atlanta, GA.
Supplemental Notes Sponsored by Centers for Disease Control, Atlanta, GA.
Document Type Technical Report
Title Note Final rept. on Phase 1.
NTIS Issue Number 199304
Development of Continuous Isocyanates Monitor.
Development of Continuous Isocyanates Monitor.
PB93119220

  • Continuous sampling
  • Isocyanates
  • Air pollution monitors
  • Occupational safety and health
  • Chemiluminescence
  • Design criteria
  • Performance evaluation
  • Threshold detectors
  • Occupational exposure
  • Indoor air pollution
  • Concentration(Composition)
  • Molecular energy levels
  • Toluene diisocyanate
  • CAS 584-84-9
  • Threshold Limit Value
  • National Institute for Occupational Safety and Health
  • 68A - Air Pollution & Control
  • 68G - Environmental Health & Safety
  • 57U - Public Health & Industrial Medicine
  • 99F - Physical & Theoretical Chemistry
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