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Tiina J Kauppila et al.
Journal of the American Society for Mass Spectrometry, 26(6), 1036-1045 (2015-04-02)
Seventy-seven EPA priority environmental pollutants were analyzed using gas chromatography-mass spectrometry (GC-MS) equipped with an optimized atmospheric pressure photoionization (APPI) and an atmospheric pressure laser ionization (APLI) interface with and without dopants. The analyzed compounds included e.g., polycyclic aromatic hydrocarbons...
Fourier transform NMR in liquids at high pressure. III. Spin-lattice relaxation in toluene-d8.
Wilbur DJ and Jonas J.
J. Chem. Phys. , 62(7), 2800-2807 (1975)
Alejandro G Lichtscheidl et al.
Dalton transactions (Cambridge, England : 2003), 44(36), 16156-16163 (2015-08-22)
The synthesis and full characterization, including Nuclear Magnetic Resonance (NMR) data ((1)H, (13)C{(1)H} and (119)Sn{(1)H}), for a series of Me3SnX (X = O-2,6-(t)Bu2C6H3 (), (Me3Sn)N(2,6-(i)Pr2C6H3) (), NH-2,4,6-(t)Bu3C6H2 (), N(SiMe3)2 (), NEt2, C5Me5 (), Cl, Br, I, and SnMe3) compounds in...
Tiina J Kauppila et al.
Journal of the American Society for Mass Spectrometry, 25(11), 1870-1881 (2014-09-25)
A novel, gas-tight API interface for gas chromatography-mass spectrometry was used to study the ionization mechanism in direct and dopant-assisted atmospheric pressure photoionization (APPI) and atmospheric pressure laser ionization (APLI). Eight analytes (ethylbenzene, bromobenzene, naphthalene, anthracene, benzaldehyde, pyridine, quinolone, and...
Solvent Effects in Nuclear Magnetic Resonance Spectroscopy. IX. 1 A Variable-Temperature Study of α,β-Unsaturated Ketones in Toluene-d8 Solution.
Ronayne J, et al.
Journal of the American Chemical Society, 88(22), 5288-5292 (1966)
Didier G Diomande et al.
Analytical chemistry, 87(13), 6600-6606 (2015-06-13)
The natural xanthines caffeine, theobromine, and theophylline are of major commercial importance as flavor constituents in coffee, cocoa, tea, and a number of other beverages. However, their exploitation for authenticity, a requirement in these commodities that have a large origin-based...
Valerie L Colley et al.
Drug testing and analysis, 7(3), 241-246 (2014-10-11)
South American 'crack' cocaine, produced directly from coca leaf, can be distinguished from US domestically produced crack on the basis of occluded solvent profiles. In addition, analysis of domestically produced crack indicates the solvents that were used for cocaine hydrochloride...
Freddy H Havaldar et al.
Journal of labelled compounds & radiopharmaceuticals, 58(4), 163-165 (2015-02-19)
A d4 -labeled isotopomer of deferasirox was synthesized as internal standard for use in a LC/mass spectroscopy (MS)/MS method developed for the simultaneous quantitative determination of deferasirox in human serum. d4 -deferasirox was synthesized from d8 -toluene.
Wolfram Buss et al.
Journal of environmental management, 156, 150-157 (2015-04-08)
Pyrolysis liquids consist of thermal degradation products of biomass in various stages of its decomposition. Therefore, if biochar gets affected by re-condensed pyrolysis liquids it is likely to contain a huge variety of organic compounds. In this study the chemical...
Xiaoyong Lu et al.
Molecules (Basel, Switzerland), 19(9), 14292-14303 (2014-09-13)
Gated molecular encapsulations, with baskets of type 1, are postulated to occur by the mechanism in which solvent molecule penetrates the inner space of 1, through one of its apertures, while the residing guest simultaneously departs the cavity. In the...