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You searched for: Journal Journal of analytical chemistry Remove constraint Journal: Journal of analytical chemistry Publication Year 2016 Remove constraint Publication Year: 2016 Source 2016 v.71 no.14 Remove constraint Source: 2016 v.71 no.14
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1. A chromatography-mass spectrometry study of aquatic chlorination of UV-filter avobenzone

Author:
Kalister, K.; Dolenc, D.; Sarakha, M.; Polyakova, O. V.; Lebedev, A. T.; Trebše, P.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1289-1293
ISSN:
1061-9348
Subject:
UV filters; aromatic compounds; chlorination; disinfection; gas chromatography-mass spectrometry; liquid chromatography; sunscreens; tandem mass spectrometry
Abstract:
... We studied the reactions of 4-tert-butyl-4′-methoxydibenzoylmethane (avobenzone), the most common UV filter in formulations of sunscreens, under the conditions of disinfection. Three chlorinated compounds were identified as the main products. Their structures were confirmed by high-performance liquid chromatography-tandem mass spectrometry (HPLC–MS²) with accurate mass measurements and by gas chro ...
DOI:
10.1134/S1061934816140057

2. A comparison of electrospray tandem mass spectra of some sialic acid derivatives: Ion trap and high resolution QqToF mass spectrometers

Author:
Chizhov, A. O.; Shpirt, A. M.; Savel’eva, N. Y.; Kononov, L. O.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1392-1396
ISSN:
1061-9348
Subject:
elemental composition; esters; hybrids; ions; sialic acid; sodium; spectrometers
Abstract:
... 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 mass spectra for the [M + Na]⁺ and [M + K]⁺ ions. A parallel use of an ion trap and a hybrid QqToF instrument gives information about the fragmentation pathways of ions of s ...
DOI:
10.1134/S1061934816140045

3. Application of high-performance liquid chromatography/high-resolution mass spectrometry to the investigation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide

Author:
Kuleshov, D. O.; Berezkina, T. E.; Russkikh, Y. V.; Chernova, E. N.; Zhakovskaya, Z. A.; Masyukevich, S. V.; Gall, L. N.; Gall, N. R.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1381-1388
ISSN:
1061-9348
Subject:
high performance liquid chromatography; hydrogen peroxide; mass spectrometry; oxidation; sodium
Abstract:
... High-performance liquid chromatography combined with high-resolution mass spectrometry has been used to study the mild oxidation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) with hydrogen peroxide. Reference peaks have been identified for the initial substance and reaction products. A possibility of using high-performance liquid chromatography with high-resolution mass spectrometry for t ...
DOI:
10.1134/S1061934816140082

4. A “soft” ionization mass spectrometric study of organic sulfides as sulfonium salts

Author:
Kozlov, A. V.; Borisov, R. S.; Zaikin, V. G.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1294-1300
ISSN:
1061-9348
Subject:
alkylation; cations; desorption; halides; ionization; methionine; molecular weight; sulfides; tandem mass spectrometry
Abstract:
... Preliminary conversion of nonpolar organic sulfides into sulfonium salts was proposed for their study and analysis by laser desorption/ionization (MALDI and SALDI) and electrospray/ionization (ESI) mass spectrometry. General possibilities of the methodology proposed were demonstrated on examples of dialkyl sulfides, substituted thiacyclanes, dibenzothiophene, and methionine methyl ester. Various a ...
DOI:
10.1134/S1061934816140070

5. Chromatography–mass spectrometry determination of alkyl methylphosphonic acids in urine

Author:
Koryagina, N. L.; Savel’eva, E. I.; Khlebnikova, N. S.; Ukolov, A. I.; Ukolova, E. S.; Karakashev, G. V.; Radilov, A. S.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1309-1318
ISSN:
1061-9348
Subject:
acids; esters; gas chromatography-mass spectrometry; high performance liquid chromatography; nerve agents; urine
Abstract:
... The potentials of different chromatography–mass spectrometry methods for the determination of alkyl methylphosphonic acids (AMPAs)—the chemical markers of nerve agents in urine—are compared. The gas chromatography–mass spectrometry (GC–MS) characteristics of various volatile AMPA derivatives are studied. The preference of perfluorobenzyl derivatives over methyl, trimethylsilyl and tert-butyldimeth ...
DOI:
10.1134/S1061934816140069

6. Comparative analysis of the binding of thiacalix[4]arene-monocrown-ethers with monovalent metal salts using MALDI mass spectrometry

Author:
Sharafutdinova, D. R.; Bazanova, O. B.; Murav’ev, A. A.; Solov’eva, S. E.; Bredikhina, Z. A.; Babaev, V. M.; Antipin, I. S.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1352-1359
ISSN:
1061-9348
Subject:
cations; cesium; copper; ethylene oxide; lithium; matrix-assisted laser desorption-ionization mass spectrometry; metal ions; phenol; potassium; rapid methods; salts; silver; sodium
Abstract:
... MALDI mass spectrometry is used for the first time for the rapid assessment of the binding of thiacalix[4]arene-monocrown-ethers with metal cations (Li, Na, K, Cs, Cu, Ag). The work is performed on examples of thiacalix[4]arene-monocrown-ethers in 1,3-alternate conformation with various numbers (m) of ethylene oxide units and various substituents in phenol groups. It is shown that thiacalix[4]aren ...
DOI:
10.1134/S1061934816140148

7. Extraction of information attributes from the mass spectrometric signals of air

Author:
Manoilov, V. V.; Kuzmin, A. G.; Titov, U. A.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1301-1308
ISSN:
1061-9348
Subject:
air; algorithms; humans; instrumentation; mass spectrometry; spectral analysis; spectrometers
Abstract:
... The paper describes a new method of the extraction of information attributes from the processed signals, generalized spectral analysis in an adapted basis. Studies of the functional structure of mathematical foundations and an adaptable classification system of different signal types, including the quadrupole mass spectra of air, were carried out. Algorithms for the synthesis of basis functions ad ...
DOI:
10.1134/S1061934816140094

8. GC/MS characterization of monosubstituted hydrazones of glyoxylic acid ethyl ester

Author:
Rotaru, K. I.; Zenkevich, I. G.; Kostikov, R. R.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1377-1380
ISSN:
1061-9348
Subject:
gas chromatography-mass spectrometry; glyoxylic acid; ionization; ions; isomers
Abstract:
... Electron ionization mass spectra and gas chromatographic retention indices of a series of newly synthesized N-monosubstituted (alkyl, aryl, allyl) hydrazones of glyoxylic acid ethyl ester RNHN=CHCO₂C₂H₅ were considered. It was shown the hydrazones were partially converted into isomeric (ethoxycarbonyl)methyl diimides during their GC separation (mostly in the heated injector port of the gas chromat ...
DOI:
10.1134/S1061934816140136

9. New possibilities of dimethylformamide dimethylacetal as a derivatization agent for gas chromatography/mass spectrometry analysis

Author:
Zenkevich, I. G.; Pushkareva, T. I.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1341-1351
ISSN:
1061-9348
Subject:
amino acids; carbonyl compounds; carboxylic acids; derivatization; dimethylformamide; esters; ethers; gas chromatography; hydrogen; ions; mass spectrometry; phenols; thiols
Abstract:
... It is shown that the use of dimethylformamide dimethylacetal for the derivatization of analytes in gas chromatography/mass spectrometry cannot be restricted by the known conversion of carboxylic acids, phenols, and thiols into their methyl esters (ethers), as well as by the conversion of non-volatile amino acids (and C-amino compounds of other classes) into their dimethylaminomethylene derivatives ...
DOI:
10.1134/S1061934816140161

10. On the impossibility of double focusing in combined electric and magnetic fields homogeneous in Euler’ terms

Author:
Berdnikov, A. S.; Averin, I. A.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1389-1391
ISSN:
1061-9348
Subject:
analytical chemistry; electric field; magnetic fields; mass spectrometry; spectrometers
Abstract:
... The use of Euler’s homogeneous electric and magnetic fields can be a good basis for designing static mass spectrometers capable of operating in a spectrographic mode and enabling recording of mass spectra with a wide mass range in one measurement. It is proved mathematically that, when combined Euler’s homogeneous electric and magnetic fields are used to design a single-cascade mass-spectrometer, ...
DOI:
10.1134/S1061934816140021

11. Prediction of electron ionization mass spectra of О-alkyl methylphosphonothionofluoridates

Author:
Morozik, Yu. I.; Dudkin, A. V.; Tkachuk, Yu. V.; Rybal’chenko, I. V.; Khatymov, R. V.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1319-1325
ISSN:
1061-9348
Subject:
ionization; organic compounds; oxygen; prediction; toxicity
Abstract:
... Electron ionization mass spectra of poorly studied toxic alkyl methylphosphonothionofluoridates and alkyl methylphosphonofluoridates are discussed. It is demonstrated that the compounds are decomposed in accordance with the general scheme of fragmentation of monofunctional organic compounds RX (X is a functional group), proposed previously. At the same time, noticeable differences between the corr ...
DOI:
10.1134/S1061934816140100

12. Static mass spectrographs of a new type using Euler’s homogeneous electric and magnetic fields. II: Conditions of high-order double focusing for two-cascade schemes

Author:
Berdnikov, A. S.; Averin, I. A.; Golikov, Yu. K.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1332-1340
ISSN:
1061-9348
Subject:
magnetic fields; mass spectrometry; spectrometers
Abstract:
... Static mass spectrometers are masked by more modern and more sophisticated mass spectrometric instruments, but their potential nowhere is almost exhausted. One of the principle advantages of static mass spectrometers is that they are the only type of mass spectrometric instruments capable of operating in a spectrographic mode by measuring the whole range of masses per a single run. However, system ...
DOI:
10.1134/S1061934816140033

13. Stereospecific fragmentation of starfish polyhydroxysteroids in electrospray ionization mass spectrometry

Author:
Popov, R. S.; Dmitrenok, P. S.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1368-1376
ISSN:
1061-9348
Subject:
Asteroidea; chemical elements; dissociation; electrospray ionization mass spectrometry; stereoisomers
Abstract:
... Electrospray ionization mass spectra and collision-induced dissociation mass spectra in positive and negative ion modes of five polyhydroxysteroid compounds from starfish were studied. Tandem mass spectra exhibit extensive fragmentation, including sequential neutral losses of H₂O molecules and cleavages in the tetracyclic nucleus and side chains. The relative intensity of some peaks in tandem mass ...
DOI:
10.1134/S1061934816140124

14. Synthesis of ion-optical devices for the transportation of charged particle beams in mass spectrometers

Author:
Pavlov, V. V.; Krasnova, N. K.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1360-1367
ISSN:
1061-9348
Subject:
algorithms; analytical methods; electric field; equations; spectrometers; transportation
Abstract:
... An approach to the creation of corpuscular-optical devices for transforming charged particle beams is discussed. These devices are useful for the optimization and creation of the most convenient configuration of the ion path. The approach relies on an inverse dynamics problem formulated on the basis of the Hamilton–Jacobi equation. Motion in the symmetry plane of a three-dimensional field is consi ...
DOI:
10.1134/S1061934816140112

15. Tris(2,6-dimethoxyphenyl)methyl carbenium ion as a charge derivatization agent for the analysis of primary amines by MALDI mass spectrometry

Author:
Topolyan, A. P.; Strizhevskaya, D. A.; Slyundina, M. S.; Belyaeva, M. A.; Ivanova, O. M.; Korshun, V. A.; Ustinov, A. V.; Mikhura, I. V.; Formanovsky, A. A.; Borisov, R. S.
Source:
Journal of analytical chemistry 2016 v.71 no.14 pp. 1326-1331
ISSN:
1061-9348
Subject:
absorbance; bioactive compounds; cations; derivatization; matrix-assisted laser desorption-ionization mass spectrometry; primary amines
Abstract:
... A novel derivatization method for the analysis of primary amines by MALDI mass spectrometry is proposed. Tris(2,6-dimethoxyphenyl) methyl carbenium cation reacts smoothly with primary amines, forming permanently charged adducts with the mass increment +359 Da and absorbance in the UV region. The approach was tested on a number of amines, including biologically active compounds and therapeutic agen ...
DOI:
10.1134/S106193481614015X