The biochemical properties of unsaturated fatty acids (FA) are sensitive to double bond position.A method was developed recently for the structural determination of double bond position in unsaturated FA using acetonitrile as a chemical ionization (CI) reagent gas. Under CI conditions, acetonitrile self-reacts in an ion-molecule reaction to produce a reagent ion of m/z 54, previously identified as (1-methy- leneimino)-1-ethenylium (MIE). MIE covalently adds across analyte double bonds to yield a series of ions 54 daltons (Da) above the molecular weight of the analyte. By collisionally induced dissociations in an ion trap, diagnostic ions are produced that unambiguously establish the location of double bonds in unsaturated hydrocarbons.
Ion molecule reactions of ionic species from acetonitrile with unsaturated hydrocarbons for the identification of the double bond position using an ion trap
FAVRETTO, DONATA;
1997
Abstract
The biochemical properties of unsaturated fatty acids (FA) are sensitive to double bond position.A method was developed recently for the structural determination of double bond position in unsaturated FA using acetonitrile as a chemical ionization (CI) reagent gas. Under CI conditions, acetonitrile self-reacts in an ion-molecule reaction to produce a reagent ion of m/z 54, previously identified as (1-methy- leneimino)-1-ethenylium (MIE). MIE covalently adds across analyte double bonds to yield a series of ions 54 daltons (Da) above the molecular weight of the analyte. By collisionally induced dissociations in an ion trap, diagnostic ions are produced that unambiguously establish the location of double bonds in unsaturated hydrocarbons.Pubblicazioni consigliate
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