Determination of Compound Types in Complex Mixtures Using Subtraction and Gas Chromatographic Readout

Details

• Personal Author:
  Duvall JJ ; Harris FL ; Jensen HB ; Morandi JR ; Poulson RE
• Description:
  A method for giving rapid, reliable, compound-type analyses on distillates from crude oils has been discussed and compared with a classical method for tar acids, tar bases, aromatics, olefins, and paraffins. The new method, using gas chromatographic readout before and after the subtraction of a compound type from a distillate with an internal standard, can be performed on very small samples or dilute solutions. In addition, the new method gives absolute values for saturates, olefins, and aromatics plus polars if polars are defined as those materials staying on silica gel with the aromatics when a nonpolar eluent is used. The determination of tar acids and tar bases has no effect on the saturate and olefin values, only on the aromatic value. Because the extractive determinations using gas chromatographic readout produce results having greater reliability and precision than older methods, the gas chromatographic readout method is useful for compound-type characterization work on polar materials. By comparison of results obtained using a variety of polar-subtractive reagents with those results available from nonaqueous titrimetry or other independent methods, new information on the chemical nature of polar materials can be obtained. [Description provided by NIOSH]
• Subjects:
  Chemistry, Analytic Occupational Health Safety
• Keywords:
  Analytical Chemistry Analytical Processes Gas Chromatography Petroleum Distillates
• Series:
  Mining Publications
• ISBN:
  9780876641811
• Publisher:
  Instrument Society of America
• Document Type:
  Text
• Genre:
  Journal Article ; Proceedings
• Place as Subject:
  OSHA Region 8 ; Wyoming
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  LERC - Laramie Energy Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  193-201
• Volume:
  10
• Issue:
  5
• NIOSHTIC Number:
  nn:10010390
• Citation:
  Analysis Instrumentation: Proceedings of the 18th Annual ISA Analysis Instrumentation Symposium, May 3-5, 1972, San Francisco, California. Chapman RL, McNeill GA, Bartz AM, eds. Pittsburgh, PA: Instrument Society of America, 1972 May; 10(5):193-201
• Editor(s):
  Chapman RL; McNeill GA; Bartz AM
• Federal Fiscal Year:
  1972
• Peer Reviewed:
  False
• Source Full Name:
  Analysis Instrumentation: Proceedings of the 18th Annual ISA Analysis Instrumentation Symposium, May 3-5, 1972, San Francisco, California
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f9003db2c80c8b610b5a4b80dd2fd6e9d5377adfbd75db70197e58fd352df90d1c3924bf31b573b93903c24bc64b65145917a8f0ecfedbf8daf3a79f6ee53349
• Download URL:
  https://stacks.cdc.gov/view/cdc/220006/cdc_220006_DS1.pdf
• File Type:
  [PDF - 630.07 KB ]