ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Dimethylphosphate esters of vitamins D2 and D3 and of 7-dehydrocholesterol give satisfactory mass spectra under electron impact using the direct introduction probe, while this method is not suitable for the related phosphorodichloridates, which undergo to thermal decomposition-polymerization processes. Such processes are avoided using the direct electron impact method. Abundant molecular ions or their protonated analogues are obtained by field desorption.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200100205
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