ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The secondary ion mass spectrometry, regardless of the charge status of the primary beam, is a good means not only of determining the type of phospholipid and the fatty acid components but also the isomeric positions of the acyl groups. Matrix-assisted secondary ion (SI) mass spectra of phosphatidylcholines in the positive mode show two characteristic doublets 2 u apart originating from the deacyl and deacyloxy cleavages of the compounds. The relative abundance of these ions is diagnostic of the ester positions, that is, the fragments originating from the C2-ester loss are more abundant than the corresponding ones from the C1-ester loss.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200110803
