Applying Open-Path FTIR with a Bi-Beam Strategy to Evaluate Personal Exposure in Indoor Environments: Experimental Results of a Validation Study

Details

• Personal Author:
  Hashmonay RA ; Varr J ; Wu CF ; Yost MG
• Description:
  This study evaluated the performance and feasibility of using open-path Fourier transform infrared (OP-FTIR) with a bi-beam strategy to assess personal exposures in workplaces. The bi-beam strategy combines a long beam and a short beam measurement to calculate the average concentration level of the segmented region. A series of experiments was conducted with six human subjects at two workstations inside a chamber. A bi-beam geometry was set up for each workstation. Each subject repeatedly performed two tasks (9 min/task), which were designed to simulate a painting and an assembly task. For each task a tracer gas (N(2)O) was released from a point source near the subject. During each task, while the OP-FTIR collected the N(2)O spectrum, bag samples were collected simultaneously at nose and lapel height. Statistical data analysis applied a general linear model with the bag samples as the dependent variable. Results show that the locations, tasks, and subjects are not significant factors when using OP-FTIR measurements with the bi-beam strategy to estimate personal exposure at the nose height. The model used in this study fits the data reasonably well (R(2)=0.87), and when it is compared with a second set of experimental data, the bias is 0.7 ppm (3%) and the precision is 5.5 ppm. This study demonstrates that the bi-beam sampling strategy may offer a new approach for applying OP-FTIR to industrial hygiene monitoring. [Description provided by NIOSH]
• Subjects:
  Environmental Monitoring Occupational Exposure Occupational Health Safety
• Keywords:
  Author Keywords: Beam Geometry Environmental-health-monitoring Gamma Model Humans Models Occupational-exposure Occupational-health Open-path FTIR Personal Exposure Simulation-methods Statistical-analysis

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• ISSN:
  0002-8894
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  181-188
• Volume:
  64
• Issue:
  2
• NIOSHTIC Number:
  nn:20029274
• Citation:
  Am Ind Hyg Assoc J 2003 Mar/Apr; 64(2):181-188
• Contact Point Address:
  Department of Environmental Health, University of Washington, Seattle, WA 98195, USA
• Federal Fiscal Year:
  2003
• Peer Reviewed:
  True
• Source Full Name:
  American Industrial Hygiene Association Journal
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9a7e6d8ebb2e4ec20d09026d4428de342292f7808121420bac1cfd487b1925c58a0b947436b78b9cfd117680c4f35999f47043a8dbc685ce64b423923b5826be
• Download URL:
  https://stacks.cdc.gov/view/cdc/190302/cdc_190302_DS1.pdf
• File Type:
  [PDF - 191.96 KB ]