A method is presented to characterize diols using negative ion electrospray (ES) mass spectrometry in combination with collision-induced dissociation tandem mass spectrometry (MS/MS). The analyte diol is added to a solution containing an ethylene glycol/boric acid [2:1] complex and then subjected to
Features of Si rearrangement in the structural analysis by mass spectrometry
β Scribed by J. Seibl
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 161 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
β¦ Synopsis
Attention is drawn to the general nature of rearrangement processes which in silylated organic compounds by non-bonded interactions of the ionized Si centre with nucleophilic functional groups produce significant amounts of recombination products under electron impact conditions. Several typical examples involving different functional groups are shown to illustrate the appearance of the resulting characteristics.
~~ ~
π SIMILAR VOLUMES
Six cephalosporins of pharmacological interest, cephalexin, cephuroxime, cephazolin, cephoperazone sodium salt, cephatrizin free acid and cephonicid disodium salt, were analysed by electrospray mass spectrometry. [ M Γ Na ]anions were produced in high yield in the case of cephalexin, cephuroxime, ce
Negative ion fast atom bombardment mass spectrornetry is used to verify the sequence of olΒ‘godeoxyri~nucleotides containing a single modified nucleotide. Both the position in the sequence and the rnolecular weight of the modified nucleotide can be determined from the 3 and 5'-phosphate sequence ions