Vapor Recognition with an Integrated Array of Polymer-Coated Flexural Plate Wave Sensors

Details

• Personal Author:
  Cai QY ; Heldsinger D ; Hsieh MD ; Park J ; Zellers ET
• Description:
  Preliminary testing of a prototype instrument employing an integrated array of six polymer-coated flexural plate wave (FPW) sensors and an adsorbent preconcentrator is described. Responses to thermally desorbed samples of individual organic solvent vapors and binary and ternary vapor mixtures are linear with concentration, and mixture responses are equivalent to the sums of the responses of the component vapors, which co-elute from the preconcentrator in most cases. Limits of detection as low as 0.3 ppm are achieved from a 60-s (34 cm3) air sample and peak widths at half-maximum range from 1 to 4 s. Tests at different flow rates suggest that the kinetics of vapor sorption in the sensor coating films may limit responses at higher flow rates, however, low data acquisition rates may also be contributory. Assessments of array performance using independent test data and Monte Carlo simulations with pattern recognition indicate that individual vapors and certain binary and ternary mixtures can be recognized/discriminated with very low error. More complex mixtures, and those containing homologous vapors, are problematic. This is the first report demonstrating multi-vapor analysis with an integrated FPW sensor array. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety Solvents Volatilization
• Keywords:
  Organic-solvents Sampling Sampling-methods Vapor-detectors Vapors
• ISSN:
  0925-4005
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Michigan ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  121-130
• Volume:
  62
• Issue:
  2
• NIOSHTIC Number:
  nn:20030920
• Citation:
  Sens Actuators B Chem 2000 Feb; 62(2):121-130
• Contact Point Address:
  Department of Environmental Health Sciences, University of Michigan, 109 S. Observatory St., Ann Arbor, MI 48109-2029, USA
• Email:
  ezellers@umich.edu
• Federal Fiscal Year:
  2000
• Performing Organization:
  University of Michigan, Ann Arbor
• Peer Reviewed:
  True
• Start Date:
  19980930
• Source Full Name:
  Sensors and Actuators B: Chemical
• End Date:
  20060531
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e9ec31dfd35d3c772c337acb87179c637b126062e21b7b33c57a133a2ea8a4cbc8f9133b6e8e28516b2c01b9d516f721d155f112858cfa8e87721bf1a4556443
• Download URL:
  https://stacks.cdc.gov/view/cdc/191356/cdc_191356_DS1.pdf
• File Type:
  [PDF - 2.31 MB ]