Peculiarities of mass spectrometric detection of anthocyanins in high-performance liquid chromatography
T14N2
V.I. Deineka, A.N. Sidorov, A.N. Chulkov, L.A. Deineka
The dependence of the fragmentation degree of anthocyanin “molecular” ions upon cone voltage of mass spectrometric electrospray/ionization detector was studied. It was found that the voltage required for the fragmentation of 50 % of the original “molecular” ions, Ef(0.5) increases with the number of glycoside residues. The fragmentation results in the removal of total glycoside residues regardless of their structures. In the case of 3.5-diglycosides, two types of fragment ions were formed due to the loss of glycosidic residues from different positions while the ratio of their peak intensities was opposite to that of the masses of neutrals eliminated. The values of Ef(0.5) for the monoglycosides (190 V), diglycosides (229 V), triglycosides (267 V), and for some acylated cyanidin-3,5-diglycosides were found. These results were given for gradient separation of anthocyanins by reverse phase HPLC in aqueous acetonitrile containing 10 vol. % of formic acid using a quadrupole mass spectrometric detection.
Disentangling of information about the structure of biomolecules based on decomposition and separation of two-dimensional charge distributions of ions
T13N2
V.V. Raznikov, M.O. Raznikova, M.L. Pridatchenko Читать полностью
ESI current oscillations for high resistivity fluid with simultaneous visualization of the Taylor cone
T12N4
N.S. Fomina, S.V. Masyukevich, L.N. Gall, N.R. Gall Читать полностью
Electrospray ionization mass spectra of derivatives of 2-phenylthio-N-trifluoroacetylneuraminic acid
T12N1
Electrospray ionization mass spectra of derivatives
of 2-phenylthio-N-trifluoroacetylneuraminic acid
A.O. Chizhov, N.M. Podvalnyy, A.I. Zinin, N.N. Malysheva, L.O. Kononov
Tandem high-resolution electrospray ionization mass spectrometry
T11N3
Tandem high-resolution electrospray ionization mass spectrometry
of fluorinated thevinols and 18,19-dihydrothevinols
D.B. Eremin1, V.I. Kadentsev1, I.V. Sandulenko2, S.K. Moiseev2 Читать полностью
Масс-спектрометрия ЭРИАД как новый метод изотопного и элементного анализа
Sorry, this entry is only available in Русский.
Измерения приведенной подвижности стандартных соединений
Sorry, this entry is only available in Русский.
