Measurement of airborne diesel particulate in a coal mine using laser Raman spectroscopy.

Details

• Personal Author:
  Carlson DH ; Cornilsen BC ; Johnson JH ; Loyselle PL
• Description:
  Laser Raman Quantitative Analysis (LRQA) was evaluated as a method for measuring diesel particulates in the air of underground coal mines. This method could employ the same sampling equipment and techniques used for respirable dust level measurement, did not require transfer of samples between collection and analysis substrates and allowed for further analyses on a sample. Samples were obtained near the feeder breaker, in the return and within 2 feet of the operator on the ram car, using a personal sampler operated at 2 liters per minute flow rate. Filter loadings were aimed at 0.15 milligram per square centimeter (mg/cm2) and actually ranged from 0.07 to 0.4mg/cm2. Diesel only and coal only samples were obtained from tailpipe emissions and the continuous miner scrubber, respectively. LRQA results were compared with estimates from percent carbon-dioxide levels and with results from Micro- Orifice Uniform Deposit Impactor size selective sampling. Coal only and diesel only samples provided identifying intensity ratios for two Raman spectrum bands. Five of 11 filter sets collected at the three sampling locations revealed inhomogeneous deposition of diesel and coal particulates. The larger coal particles tended to deposit toward inner radii of filters. Relative amounts of diesel particulate ranged from 37 to 83%, with respirable levels of 0.18 to 1.61mg/m3. LRQA and size selective sampling demonstrated excellent agreement for two of three duplicate samples; the third set differed by 25% and may have been due to different conditions over the sampling time. The authors conclude that diesel particulate monitoring techniques are important and that increased precision and accuracy of the LRQA method can be achieved by optimization of procedures.
• Subjects:
  Accidents, Occupational Carcinogens Ethylenes Halothane Occupational Health Personal Protective Equipment Respiratory Protective Devices Safety
• Keywords:
  Airborne Particles Analytical Instruments Analytical Methods Coal Mining Diesel Emissions Diesel Exhausts Spectrographic Analysis Underground Mining
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Conference/Symposia Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  656-662
• NIOSHTIC Number:
  nn:00198847
• Citation:
  Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA. Atlanta, GA: 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. 90-108, 1990 Sep; (Pt I):656-662
• Federal Fiscal Year:
  1990
• Peer Reviewed:
  False
• Part Number:
  I
• Source Full Name:
  Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:89db142551641c1101fa290d7e1c42f0f5219970ba631f0cbf4d1bbf72d7f82d7befa7c68d3f646656df4a68cc43c011798ddfbdde0ebae8d8a0e1579187250a
• Download URL:
  https://stacks.cdc.gov/view/cdc/180680/cdc_180680_DS1.pdf
• File Type:
  [PDF - 254.53 KB ]