New method of mathematical correction of the results of analysis, obtained by inductively coupled plasma mass spectrometry, allowing the elimination of a double charged ions interference
T13N3
K.I. Chervyakovskii
A new method of mathematical correction of the results of analysis, obtained by inductively coupled plasma mass spectrometry, for elimination of a doubly charged ions interference based on the use the isotope signal registration in two spectrometer operation modes: in standard one and with using the collision cell was proposed. Mathematical correction of the results of arsenic determination in the model solutions was performed with the aid of two process: standard and proposed in this paper. The comparison of the results accuracy and repeatability was conducted.
Interpretation and simulation of negative ion mass spectra of some phosphorus organoelement compounds
Sorry, this entry is only available in Русский.
The «low-molecular» approach to identification of microorganisms by MALDI mass spectrometry
T13N3
B.L. Milman, Yu.Yu. Ilyasov, N.V. Lugovkina, A.A. Golovina1, A.V. Dmitriev
The new approach to microorganism identification is presented which includes the transformation of their MALDI mass spectra directed to decreasing mass scale by the order of magnitude and the use of the standard software for building mass spectral libraries of low-molecular compounds and library searches. The library of 728 transformed mass spectra of 182 strains for some Streptococcus species was built. With this library, the rate of true identification was estimated by cross-comparison between library mass spectra. The true identification rate is 84 % for three Streptococcus species that corresponds to the average trueness of species identification by MALDI as found in the literature. The proposed approach to identification can be considered as the method of choice for solving problems of bacteria identification.
A comparison of electrospray tandem mass spectra of some derivatives of sialic acid: ion trap and high resolution QqToF mass spectrometers
T13N2
A.O. Chizhov, A.M. Spirt1, N.Y. Savel’eva, L.O. Kononov
Using O-acetyl-N-acyl derivatives of O-methyl sialoside methyl esters it was shown that an ion trap and a hybrid analyzer (linear quadrupole — time-of-flight analyzer, reflectron) give comparable, though not identical secondary order mass spectra for the [M+Na]+ and [M+K]+ ions. A parallel use of an ion trap and a hybrid QqToF instrument makes possible to get information on fragmentation pathways of ions of sialic acid derivatives under collisional activation. In this case, a sequence of fragmentation may be established using an ion trap, whereas a QqToF instrument gives a possibility to reveal elemental composition of fragment ions quickly and unequivocally.
T13N2
Contents
Application of high-performance liquid chromatography / high resolution mass spectrometry for investigation of sodium 2,3-disulfanyl- 1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide
T13N2
D.O. Kuleshov, T.E. Berezkina, Y. V. Russkikh, E. N. Chernova, Z. A. Zhakovskaya,
S.V. Masyukevich, L.N. Gall, N.R. Gall
High-performance liquid chromatography combined with high resolution mass spectrometry has been used to study soft oxidation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) with hydrogen peroxide; reference peaks were identified for initial substance and reaction products. The possibility to use high-performance liquid chromatography with high resolution mass spectrometry for Sokolovsky thiol-disulphide test has been shown.
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
Detection of metabolites of flavonoids Epimedium in rats urine by high performance liquid chromatography-high-resolution tandem mass spectrometry
T13N2
O.A. Shevlyakova, K.J. Vasil’yev, A.A. Ihalaynen, A.M. Antokhin, V.F. Taranchenko,
V.M. Goncharov, A.V. Aksenov, D.A. Mitrofanov, I.A. Rodin, O.A. Shpigun Читать полностью
Features of determination of residual amounts of chloramphenicol and tetracycline in food by high performance liquid chromatography/high resolution quadrupole time-of-flight mass spectrometry
T13N2
V.G. Amelin, N.M. Fedina, A.I. Korotkov Читать полностью
Synthesis of ion-optical devices for transportation of charged particle beams in mass spectrometers
T13N2
V.V. Pavlov, N.K. Krasnova Читать полностью
