๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Location of double-bond position in tetradecenols without chemical modification by mass spectrometry

โœ Scribed by Michio Horiike; Yuan Gu; Chisato Hiranio


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
321 KB
Volume
25
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

โœฆ Synopsis


Twelve positional isomers of tetradecenol were analysed by conventional combined gas chromatography/mass spectrometry without any chemical derivatization for the elucidation of the double-bond position. The spectra were interpreted in terms of similarity of mass spectral patterns based on a fuzzy reasoning method, in which the relative abundance of selected predominant fragment ions were chosen as standard parameters and similarity indices were devised. The method was tested with pure alcohols and enabled the double-bond position to be located with acceptable accuracy.


๐Ÿ“œ SIMILAR VOLUMES


Determination of the double-bond positio
โœ Michio Horiike; Gu Yuan; Chul-Sa Kim; Chisato Hirano; Katsuhiko Shibuya ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 421 KB

Fourteen isomers of chemically unmodified hexadecenol were analysed by two types of quadrupole mass spectrometer, coupled with a gas chromatograph, for the location of the double-bond position. A series of spectra were interpreted in terms of mass spectral patterns on a fuzzy classification, in whic

Mass spectrometric indication of double
โœ Michio Horiike; Chisato Hirano ๐Ÿ“‚ Article ๐Ÿ“… 1988 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 371 KB

Ten positional isomers (A2-A1') of unmodified dodecenal were analysed by conventional combined gas chromatography/electron impact mass spectrometry. The relative abundances of some predominant fragments in the isomers examined varied with the position of the original double bond. Eminent dominance o

Determination of double bond positions i
โœ Toshio Ariga; Eiji Araki; Takeshi Murata ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 418 KB

Trimethylsilylated methyl esters of octadecadienoic, eicosadienoic, and octadecatrienoic acids, after stereospecific oxidation, were investigated by combined gas chromatography-chemical ionization mass spectrometry. Molecular weight could be determined by the ions at m/e(M -1)' and (M + 73)+ and the