Retention indices, relative response factors, and mass spectra of trifluoroethyl and heptafluorobutyl esters of carboxylic acids determined by capillary GC/MS
The GC/MS characteristics of carboxylic acid esters prepared from fluorine-containing alcohols were compared to those of methyl esters. The GC retention of 2,2,2-trifluoroethyl (TFE) esters was less than, and 2,2,3,3,4,4,4-heptafluoro-1-butyl (HFB) esters approximately equivalent to that of methyl esters. The peak shape of both TFE and HFB esters was slightly superior to that of methyl esters. Mass spectra of TFE and HFB aliphatic esters show significantly more intense molecular and key fragment ions than those of methyl esters. Also, owing to their significantly higher molecular weights, TFE or HFB ester molecular ions and most fragment ions of interest occur at significantly higher m/z values than most potential interfering ions. The GC retention indices, relative GC/MS total ion current response factors, and 70 eV electron impact mass spectra of about 70 TFE and 70 HFB carboxylic acid esters are reported. Results from analysis of a TFE/HFB esterified petroleum carboxylic acid concentrate are discussed in detail. 26 refs., 17 figs., 3 tabs.
- Research Organization:
- National Inst. for Petroleum and Energy Research, Bartlesville, OK (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FC22-83FE60149
- OSTI ID:
- 6469170
- Report Number(s):
- NIPER-473; ON: DE91002203
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
023000* -- Petroleum-- Properties & Composition
ACYLATION
ALCOHOLS
CARBOXYLIC ACID ESTERS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
ENERGY SOURCES
ESTERIFICATION
ESTERS
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
HYDROXY COMPOUNDS
MASS SPECTRA
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROLEUM
SEPARATION PROCESSES
SPECTRA