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  • 1
    Electronic Resource
    Electronic Resource
    Application of capillary supercritical fluid chromatography to the analysis of a middle distillate fuel (1984)
    Springer
    Chromatographia 18 (1984), S. 542-545 
    Details
    ISSN: 1612-1112
    Keywords: Supercritical fluid chromatography ; Alumina ; Fused silica capillary columns ; Middle distillate fuel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The application of capillary supercritical fluid chromatography (SFC) to the analysis of a middle distillate fuel is described. Small diameter (50μm i.d.) fused-silica capillary columns coated with crosslinked 50% phenyl polymethylphenyl siloxane provided high separation efficiency and good compatibility with flame ionization detection. High resolution separations of the chemical class fractions obtained by adsorption chromatography on alumina were obtained using carbon dioxide as the supercritical mobile phase and simple pressure programming techniques. In addition to the less polar fuel components, supercritical carbon dioxide allowed chromatography of the nitrogen-containing polycyclic aromatic hydrocarbon fraction and the hydroxylated polycyclic aromatic materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265691
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Capillary supercritical fluid chromatography-mass spectrometry (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 145-153 
    Details
    ISSN: 0935-6304
    Keywords: Capillary columns ; Supercritical fluid chromatography ; Supercritical fluid chromatography-mass spectrometry ; SFC-MS ; Thermally labile compound analysis ; Heavy molecular weight compound analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Capillary supercritical fluid chromatography and its combination with mass spectrometry (SFC-MS) is an important analytical methodology for the analysis of thermally labile and high molecular weight compounds. The mass spectrometer provides sensitive and highly selective detection for the chromatographic effluent. The same physical-chemical properties of supercritical fluids that provide important chromatographic advantages are also important for the transport and gas phase introduction of analyte molecules into the mass spectrometer. The low mobile phase flow rates of small diameter (〈 100 μm i.d.) capillary columns allow the total chromatographic effluent to be introduced with conventional, but often slightly modified, ion source configurations for quadrupole mass spectrometers with either electron impact (EI) or chemical ionization (CI) detection. The full range of CI reagents can also be used to obtain additional selectivity and complementary structural data. The instrumentation and operating parameters for capillary SFC-MS methods are described. The applicability and usefulness of various SFC-MS analysis methods are demonstrated using a variety of samples.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240090304
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  • 3
    Electronic Resource
    Electronic Resource
    Copolymere und Fasern aus VinylidendicarbonitrilVortrag auf der Tagung der GDCh-Fachgruppe „Kunststoffe und Kautschuk“ am 10. April 1962 in Bad Nauheim (1962)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 74 (1962), S. 545-550 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vinylidendicarbonitril (Vinylidencyanid) zeigt bei radikalisch gestarteter Copolymerisation eine viel stärkere Neigung zur Bildung von alternierend aufgebauten 1:1-Copolymeren als Acrylnitril. Während Polyvinylidencyanid trotz der molekularen Symmetrie nicht kristallisiert, sind alternierende Copolymere, vor allem mit Butadien, Isopren, Isobutylen und Vinylidenchlorid, leicht kristallisierbar. Aus höherschmelzenden Copolymeren wurden Fasern hergestellt und auf ihre physikalischen Eigenschaften geprüft. Besonders Fasern aus den Copolymeren mit Vinylacetat und Vinylchlorid zeigen im nassen und im trockenen Zustand ein hervorragendes elastisches Verhalten. Die Faser aus dem alternierend aufgebauten Copolymeren von Vinylidencyanid und Vinylacetat (Darvan®-Nytrilfaser) ist nur mäßig orientiert und zeichnet sich durch Weichheit, gute elastische Erholung und Sprungelastizität im trockenen und nassen Zustand aus.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19620741506
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  • 4
    Electronic Resource
    Electronic Resource
    Copolymers and Fibers from VinylidenedicarbonitrileLecture at the Meeting of the Gesellschaft Deutscher Chemiker, Section “Kunststoffe und Kautschuk”, on April 10th. 1962 at Bad Nauheim (Germany). (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 425-430 
    Details
    ISSN: 0570-0833
    Keywords: Copolymers ; Fibers ; Vinylidenedicarbonitrile ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vinyldendicarbonitrile (Vinylidene cyanide) on free redical catalyzed copolymerization shows a much stronger tendency to form 1:1 alternating copolymers than acrylonitrile. While bulk poly(vinylidene cyanide) fails to crystallize, despite its molecular symmetry, several alternating copolymers are readily crystallizable, notably those containing butadiene, isoprene, isobutylene, or vinylidene chloride. Fibers have been prepared from a number of the higher melting copolymers and examined for physical properties. Fibers from the vinyl acetate and vinyl chloride copolymers show expectional elastic behavior both when dry and wet. The fiber from the vinylidene cyanide |vinyl acetate alternating copolymer (Darvan® nytril fiber) is only moderately oriented and is characterized by exceptional softness and excellent elastic recovery and resilience, both when dry and wet.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196204251
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    Paper (German National Licenses)
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