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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
|
| pubmed:dateCreated |
1992-5-6
|
| pubmed:abstractText |
Electron ionization (EI), chemical ionization (CI) and fast-atom bombardment (FAB) mass spectra of the marine toxin okadaic acid and its synthetic methyl, pentafluorobenzyl, and trimethylsilyl ester and ether derivatives were generated. Several ionization conditions and ion-processing methods were used to obtain positive- and negative-ion conventional spectra and tandem (MS/MS) spectra. The EI and the positive-ion CI spectra provided fragment ions characteristic of the structure, and the negative-ion CI and FAB spectra provided molecular ions. The addition of alkali salts to the FAB matrix resulted in reduced fragmentation and the formation of intense alkali-metal-cationized molecules. Pentafluorobenzyl ester derivatives provided intense carboxylate ions under electron-capture ionization. Analytically useful MS/MS spectra were obtained by low-energy collision-induced decomposition of the carboxylate anion produced from the tetrasilylated pentafluorobenzylokadaate.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jun
|
| pubmed:issn |
0951-4198
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
5
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
283-90
|
| pubmed:dateRevised |
2006-11-15
|
| pubmed:meshHeading | |
| pubmed:year |
1991
|
| pubmed:articleTitle |
Mass spectral characteristics of okadaic acid and simple derivatives.
|
| pubmed:affiliation |
Mass Spectrometry Center, College of Medicine, University of South Alabama, Mobile 36688.
|
| pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
|