Characterization of a micro-helium discharge detector for gas chromatography

Details

• Personal Author:
  Agah M ; Narayanan S ; Rice G
• Description:
  The characterization of a miniaturized helium discharge ionization detector (µHDID) for micro gas chromatography through a number of parameterized experimental measurements is presented. The response of the detector is directly related to the He discharge voltage, bias electrode-to-discharge distance, and collector-to-bias distance by a simple mathematical expression. The effect of the bias voltage and the bias and collector electrode spacings relative to the He discharge were found to improve the detector response as much as 12-fold depending on the design and various operational parameters. The detection of octane from a headspace injection was performed over 24 h of continuous operation with no noticeable degradation. Finally, a sensitivity test for octane in air was conducted using the design and parameters with the best response to obtain an absolute limit of detection of 60 pg for octane in air at 3.3 mW. [Description provided by NIOSH]
• Subjects:
  Air Movements Air Pollution Air Pollution, Indoor Occupational Health Safety
• Keywords:
  Air-flow Air-quality Author Keywords: Micro Gas Chromatography Gas-chromatography Gas Detector Helium Discharge Ionization Mathematical-models Measurement-equipment Photoionization
• ISSN:
  0925-4005
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  190-197
• Volume:
  206
• NIOSHTIC Number:
  nn:20047189
• Citation:
  Sens Actuators B Chem 2015 Jan; 206:190-197
• Contact Point Address:
  Masoud Agah, VT MEMS Lab, Bradley Department of Electrical & Computer Engineering, Virginia Tech, Blacksburg, VA 24061
• Email:
  agah@vt.edu
• Federal Fiscal Year:
  2015
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  True
• Start Date:
  20120701
• Source Full Name:
  Sensors and Actuators B: Chemical
• End Date:
  20150630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0d9546851bf19db0d50402ae9bb285fdcf0c40883afaab48089c303e38b6ca9251e90003072cbc89e894137ae2727a19177b472a385abbea24bd41158776b9ed
• Download URL:
  https://stacks.cdc.gov/view/cdc/202351/cdc_202351_DS1.pdf
• File Type:
  [PDF - 1.60 MB ]