Report of Investigations 8853: An Analyzer for Determining Helium-4 in the Parts-per-Billion Range

Details

• Journal Article:
  NTIS: PB84/189554
• Personal Author:
  Holland, Philip W.
• Description:
  The Bureau of Mines has developed a trace helium analyzer for determining helium-4 in the parts-per-billion range. The instrument is used for analyzing pure gases, laboratory-prepared standards, and atmospheric samples. Accuracy at the 95-pct confidence level in the 50- to 20,000-ppb range is within +/-2 ppb or +/-0.4 pct, whichever is greater. The minimum detectable helium-4 concentration is calculated to be 5 ppb. The analyzer consists of a modified helium leak-detector mass spectrometer, a laboratory-built sample inlet system, and a liquid-nitrogen-cooled charcoal trap. A programmable integrator and event-control module make automatic operation possible. The portability of the analyzer allows it to be used in the field. [Description provided by NIOSH]
• Subjects:
  Helium Mining Occupational Health Safety
• Source:
  NTIS: PB84/189554; :1-9
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  United States
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HEFO - Helium Field Office
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  14 pdf pages
• NIOSHTIC Number:
  nn:10003355
• Federal Fiscal Year:
  1984
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:cee736141bd12c1f1d86360d8aba256487966cfb8c5bea77385cc1da7724cfb4d24768b79b26be16d6472a8ec9e22d103bdebc5f65f4990cf6aff99f3da04ecb
• Download URL:
  https://stacks.cdc.gov/view/cdc/10305/cdc_10305_DS1.pdf
• File Type:
  [PDF - 601.99 KB ]