Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Harry J. Svec"'
Autor:
R. J. Conzemius, Harry J. Svec
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 103:57-66
A new concept of mass spectrometry is described in which individual ions are characterized with respect to mass and structure. The concept allows flexibility in ion source design by removing the need for high ion currents. It greatly simplifies the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65ff42cc6306221a85db5f142a64e6c9
https://doi.org/10.1016/0168-1176(90)80016-v
https://doi.org/10.1016/0168-1176(90)80016-v
Publikováno v:
Earth and Planetary Science Letters. 25:291-296
Oxygen isotope determinations were made using CoF 3 to extract oxygen from 27 volcanic glass samples from the East Rudolf Basin, northern Kenya. Results show that the older tuffs are progressively enriched in 18 O and that this index can be used in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffd5334e4e5bcf18d8569ae09bc80536
https://doi.org/10.1016/0012-821x(75)90244-7
https://doi.org/10.1016/0012-821x(75)90244-7
Autor:
Gerald D. Flesch, Harry J. Svec
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 59:295-302
The principal neutral fragments observed during the bombardment of ethene, propene, isobutene, cis-2-butene and trans-2-butene with 20 eV electrons are (M-H)., (M-H2), (M-CH3)., (M-CH4), CH3. and (C3H3).. The abundance of neutral fragments generated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7ad0e26320096b60b0b88cde01a9d2f
https://doi.org/10.1016/0168-1176(84)85103-4
https://doi.org/10.1016/0168-1176(84)85103-4
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 19:351-367
A mass spectrometer which permits the direct study of neutral species produced by the electron bombardment of gases is described. Functionally, it consists of an ion source with two independent electron beams, a quadrupole mass filter, and a phase-se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40e3ad8627daa254103bc633a7e8918b
https://doi.org/10.1016/0020-7381(76)80019-8
https://doi.org/10.1016/0020-7381(76)80019-8
Autor:
John J. Richard, C.D. Chrisweii, K. W. Lee, M.D. Arguello, L. D. Kissinger, James S. Fritz, Harry J. Svec
Publikováno v:
Journal - American Water Works Association. 71:504-508
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35edf58a3d001fcebd31e282ce7d5d95
https://doi.org/10.1002/j.1551-8833.1979.tb04404.x
https://doi.org/10.1002/j.1551-8833.1979.tb04404.x
Autor:
Harry J. Svec, Gerald D. Flesch
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 56:93-107
A neutral fragment mass spectrometer has been used to generate and characterize the neutral products formed when energetic electrons interact with N 2 , O 2 , CO and Ar and mixtures thereof. Atomic nitrogen in its ground state is produced from N 2 .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43ec13a2023d0150be9d2f9896ff1c1
https://doi.org/10.1016/0168-1176(84)85035-1
https://doi.org/10.1016/0168-1176(84)85035-1
Publikováno v:
Analytica Chimica Acta. 147:151-162
The glow discharge in a hollow cathode containing 20–50 μl of an aqueous sample held at liquid-nitrogen temperature is used as a source of ions in a double-focussing mass spectrometer. The device was tested with nine solutions containing an aggreg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::057cddf4c16a947937e532b39adff32f
https://doi.org/10.1016/0003-2670(83)80080-4
https://doi.org/10.1016/0003-2670(83)80080-4
Publikováno v:
Journal of AOAC INTERNATIONAL. 66:905-908
The combination of Styragel and Florisil columns allows recovery of aflatoxins at low levels. Two switching valves between the columns reduce the analysis time and exposure to solvents. Florisil is modified with oxalic acid, allowing recovery of afla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a452d17cb15fceca0de932c4cbe0fe9
https://doi.org/10.1093/jaoac/66.4.905
https://doi.org/10.1093/jaoac/66.4.905
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 56:297-305
The mass spectra of 4-methylene-2-oxetanone, 2,2,4,4-tetramethyl-1,3-cyclobutanedione, dispiro[3.1.3.1]decane-5,10-dione; dispiro[4.1.4.1]-dodecane-6,12-dione, and dispiro[5.1.5.1]tetradecane-7,14-dione are reported. Ionization energies of these comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1a5a12e0036b0e46eddf66e1c65241c
https://doi.org/10.1016/0168-1176(84)85056-9
https://doi.org/10.1016/0168-1176(84)85056-9
Publikováno v:
Chemosphere. 6:303-308
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9abc199d8e5a0c6286125cd1efc1745
https://doi.org/10.1016/0045-6535(77)90094-7
https://doi.org/10.1016/0045-6535(77)90094-7