Isomeric effects in collisionally-induced dissociation mass spectra of β-(1→6)-linked cyclic tetrasaccharides of the Glcp2GlcpN2 composition
T15N4
A.O. Chizhov , M.L. Gening, O.A. Pinsker, Yu.E. Tsvetkov, N.E. Nifantiev
Electrospray ionization high resolution mass spectra of positively charged ions (the first and the second order) of protonated molecules of isomeric β-(1→6)-linked cyclic tetrasaccharides of the Glcp2GlcpN2 composition were recorded and interpreted. It was shown that the second-order mass spectra of these compounds have some differences reflecting the mutual position of the glucopyranose and glucosamine residues. The most significant qualitative differences were observed for MS/MS spectra of doubly protonated, doubly charged molecules.
New possibilities of dimethylformamide dimethylacetal as derivatization agent for gas chromatography/mas spectrometry analysis
T13N1
I.G. Zenkevich, T.I. Pushkareva
Gc/ms characterization of monosubstituted hydrazones of glyoxylic acid ethyl ester
T12N4
K.I. Rotaru, I.G. Zenkevich, R.R. Kostikov Читать полностью
Использование индексов удерживания для хроматомасс-спектрометрической идентификации галогенсодержащих органических соединений
Sorry, this entry is only available in Русский.
Хроматомасс‑спектрометрическая идентификация примесей в изотопно‑обогащенном силане
Sorry, this entry is only available in Русский.
Прогнозирование масс-спектров О-метил,О-алкилметилфосфонатов
Sorry, this entry is only available in Русский.
Хроматомасс-спектрометрическая идентификация примесей
Impurities in high-purity carbon tetrachloride were identifi ed by gas chromatography/ mass spectrometry. The identifi cation was accomplished by comparison of experimental mass spectra with the spectra in NIST-2005 database. For concentrations, close to the limit of detection, the nature of impurities was determined using selective ion monitoring and retention times of the corresponding substances. For the fi rst time sulfur, 2 bromochloromethanes, hexachlorocyclopropane, saturated hydrocarbons C6–C18 and some aromatic impurities were identifi ed. Totally 41 impurity substances were found.
Хроматомасс-спектрометрическая идентификация продуктов
Sorry, this entry is only available in Русский.
