Determination of Gasoline Brands by the Comparison of Infrared Spectra of Polymeric Dispersants

청정분산제의 적외선 분광스펙트럼 비교를 통한 자동차용 휘발유 제조사의 판별

  • Kim, Myeonghee (R & D Laboratory, Division of Test & Research, Korea Petroleum Quality Inspection Institute) ;
  • Jang, Youngsik (R & D Laboratory, Division of Test & Research, Korea Petroleum Quality Inspection Institute) ;
  • Jung, Chungseop (R & D Laboratory, Division of Test & Research, Korea Petroleum Quality Inspection Institute) ;
  • Lee, Hyunkee (R & D Laboratory, Division of Test & Research, Korea Petroleum Quality Inspection Institute)
  • 김명희 (한국석유품질검사소 시험연구부 연구실) ;
  • 장영식 (한국석유품질검사소 시험연구부 연구실) ;
  • 정충섭 (한국석유품질검사소 시험연구부 연구실) ;
  • 이현기 (한국석유품질검사소 시험연구부 연구실)
  • Received : 1998.08.11
  • Published : 1998.12.25

Abstract

The gasoline brands can be determined by gas chromatography. However, determining from the differences in chromatograms is sometimes ambiguous because the gasoline composition is becoming similar from refinery to refinery due to stringent regulations for the protection of the atmospheric environment. To determine the gasoline brands of five refineries in Korea, we have obtained and compared IR spectra of polymeric dispersants which are added to gasoline at several hundreds of ppm levels. Since the deposit control additives used by the five refineries in Korea are different from one another, it is possible to determine the gasoline brands by comparing their IR spectra. A strong and broad C-O stretch absorption peak appears at $1,096cm^{-1}$ for the additives used by A, B, and C refineries, which renders an easy differentiation of the additives from those of D and E refineries. The differentiation of all five gasoline brands are possible due to the characteristic vibrations present in each additive.

Keywords

gasoline additives;deposit-control additives;polymeric dispersant;IR spectra;IR spectroscopy;polyether amine;polyisobutyl amine