Separation and positive identification of compounds in complex sample mixtures using on-line, LC-UV/VIS and LC-MS, direct coupling techniques

Schuster, R.

doi:10.1007/bf02261517

Cited by 20 publications

(5 citation statements)

References 3 publications

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“…Classical mass spectrometric gas-phase ionization techniques such as EI and CI are generally less suitable 260 for polar, nonvolatile compounds such as the flavonoids. Soft ionization techniques such as laser desorption, 270 field desorption (FD), 271 plasma desorption and particularly fast atom bombardment (FAB or secondary ion emission) 272 revolutionized the MS analysis of these compounds.…”

Section: Coupled Methodsmentioning

confidence: 99%

Analytical Chemistry of Fruit BioflavonoidsA Review

Robards¹,

Antolovich²

1997

Analyst

438

267

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Section: Coupled Methodsmentioning

confidence: 99%

Analytical Chemistry of Fruit BioflavonoidsA Review

Robards¹,

Antolovich²

1997

Analyst

438

267

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“…6). Other applications using DLI (Schuster, 1980) or MB (Games et ul., 1984), have also been described.…”

Section: Flavonoid Glycosidesmentioning

confidence: 99%

Mass spectrometry of underivatized naturally occurring glycosides

Wolfender

Maillard

Marston

et al. 1992

Phytochemical Analysis

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Mass spectrometry is essential for the structure determination of naturally occurring glycosides. Molecular weight and sugar sequence information can be obtained. Development of “soft” ionization techniques has allowed a direct mass spectrometric investigation of underivatized glycosides. Numerous different and complementary methods of ionization have been used for their study. For a given compound, the choice of a particular technique is crucial in order to obtain the structural information needed. A brief survey of these ionization techniques is given, together with examples of their use in major classes of plant glycosides.

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“…Peak 41 detected in the positive ionization mode exhibited [M + H] + at m / z 409.1111, C 19 H 20 O 10 and a distinct fragment at m / z 247 for the loss of a hexoside moiety, 46 annotated as khellol- O -hexoside. While, peaks 58 & 59 with molecular ions at m / z 261.0753 [M + H] + , C 14 H 12 O 5 and m / z 231.0648 [M + H] + , C 13 H 10 O 4 were annotated as khellin and visnagin, respectively as concluded from their fragmentation pattern.…”

Section: Resultsmentioning

confidence: 99%