Automatic monitoring systems for determining time weighted average workplace levels: Fourier infrared intereferometers.

Details

• Personal Author:
  Coppola J ; Sawyer RR
• Description:
  Use of a high resolution, high sensitivity Fourier Transform Infrared Gas Monitoring and Analysis system for compliance with OSHA requirements for monitoring workplace levels of vinyl-chloride (75014) monomer (VCM) and other toxic gases was described. The basic gas analyzer consisted of a rapid scanning Michelson interferometer modulator with beamsplitter, infrared source, infrared detector, Wilks 40 meter sample cell and necessary optics in a free standing optical bench and electronics console housing the system controller, data acquisition unit, minicomputer, recorder, audio alarm, and input/output terminal for programming, systems diagnostics, and printing 8 hour averages, and alarm excursions. Basic requirements met by this system were speed, sensitivity, specificity, multicompound adaptability, multisample station adaptability, and output adaptability for comprehensive display and recording. Fourier derivations of the interferogram were discussed with regard to frequency, interference, resolution, concentration, absorption, reference, and internal spectral intensity. A study of area monitors was performed for 18 months by EOCOM Corporation of Irvine, California, and the Pantasote Company of New York. Objectives of fast excursion detection, accurate employee time weighted averages, elimination of requirements for personal sampling, and a management information system aiding in achieving OSHA performance standards were evaluated by quantifying the nature of workplace gases, determining the appropriate sampling sequence for an area monitoring system, and relating employees to results of the area monitor and determining exposure. The sampling algorithm, parameters of plant data measured by the probes, were mathematically described. The authors note that excursions due to work practice were significantly decreased due to speed of the monitor.
• Subjects:
  Accidents, Occupational Blood Chemistry Cytotoxins Dust Occupational Health Safety Silicon Dioxide Temperature
• Keywords:
  Industrial-hazards Industrial-safety-programs Infrared-spectrophotometry Occupational-exposure Occupational-health-programs Regulations Safety-monitoring Sampling-equipment Toxic-vapors Workplace-studies
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Conference/Symposia Proceedings
• Place as Subject:
  California ; Georgia ; New York ; Ohio ; OSHA Region 2 ; OSHA Region 4 ; OSHA Region 5 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  115-151
• NIOSHTIC Number:
  nn:00169335
• Citation:
  Symposium proceedings: control technology in the plastics and resins industry. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 81-107, 1981 Jan; :115-151
• CAS Registry Number:
  Vinyl chloride (CAS RN 75-01-4)
• Federal Fiscal Year:
  1981
• Peer Reviewed:
  False
• Source Full Name:
  Symposium proceedings: control technology in the plastics and resins industry
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5cfc15881756b6052b51ea5a5d347048d88ad0fb36cb63d8a79513809af15325155de32fb6e50fd508f6f2647b4b3344a073098806534a5297e8e3796976330d
• Download URL:
  https://stacks.cdc.gov/view/cdc/179931/cdc_179931_DS1.pdf
• File Type:
  [PDF - 4.06 MB ]