A comparison of two laboratories for the measurement of wood dust using button sampler and diffuse reflection infrared Fourier-transform spectroscopy (DRIFTS)

Details

• Personal Author:
  Andrew, Michael E. ; Chirila MM ; Harper M ; Kwon-C-W ; Rando RJ ; Sarkisian K
• Description:
  The current measurement method for occupational exposure to wood dust is by gravimetric analysis and is thus non-specific. In this work, diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) for the analysis of only the wood component of dust was further evaluated by analysis of the same samples between two laboratories. Field samples were collected from six wood product factories using 25-mm glass fiber filters with the Button aerosol sampler. Gravimetric mass was determined in one laboratory by weighing the filters before and after aerosol collection. Diffuse reflection mid-infrared spectra were obtained from the wood dust on the filter which is placed on a motorized stage inside the spectrometer. The metric used for the DRIFTS analysis was the intensity of the carbonyl band in cellulose and hemicellulose at approximately 1735 cm-1. Calibration curves were constructed separately in both laboratories using the same sets of prepared filters from the inhalable sampling fraction of red oak, southern yellow pine, and western red cedar in the range of 0.125-4 mg of wood dust. Using the same procedure in both laboratories to build the calibration curve and analyze the field samples, 62.3% of the samples measured within 25% of the average result with a mean difference between the laboratories of 18.5%. Some observations are included as to how the calibration and analysis can be improved. In particular, determining the wood type on each sample to allow matching to the most appropriate calibration increases the apparent proportion of wood dust in the sample and this likely provides more realistic DRIFTS results. [Description provided by NIOSH]
• Subjects:
  Aerosols Dust Laboratories Occupational Health Safety Spectrum Analysis Wood
• Keywords:
  Aerosol-sampling Analytical-instruments Analytical-methods Author Keywords: Button Sampler Carbonyls Cellulose-fibers Diffuse Reflection DRIFTS Equipment-reliability Filters Gravimetric-analysis Infrared-spectroscopy Laboratory-testing Measurement-equipment Performance-capability Sampling Sampling-equipment Spectrographic-analysis Wood-dusts Wood-products Wood Dust Wood Infrared Spectrum

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• ISSN:
  0003-4878
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Louisiana ; OSHA Region 3 ; OSHA Region 6 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  336-346
• Volume:
  59
• Issue:
  3
• NIOSHTIC Number:
  nn:20045444
• Citation:
  Ann Occup Hyg 2015 Apr; 59(3):336-346
• Contact Point Address:
  Martin Harper, Exposure Assessment Branch, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
• Email:
  mharper@cdc.gov
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Source Full Name:
  Annals of Occupational Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:97d5592bf056302fda9d1046b81aa374c0191c1db0dc44d6ca0edf0f0f9f4b5d3e8a68b83b028b40d1a95496e7caaeccc64d9d35e864a267f751b6cbe112ee2c
• Download URL:
  https://stacks.cdc.gov/view/cdc/200864/cdc_200864_DS1.pdf
• File Type:
  [PDF - 1.49 MB ]