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Havanine-a steroidal alkaloid glycoside from Solanum havanense

Basterechea, M. ; Preiss, A. ; Coll, F. ; [et al.]

Amsterdam : Elsevier

Phytochemistry 23 (1984), S. 2057-2058

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ISSN: 0031-9422

Keywords: (25S)-O(3)β-D-glucopyranosyl-16α-acetoxy-22,26-epiminocholesta-5,22(N)-die ; 22,26-epiminocholestane-type alkaloids ; Solanaceae ; Solanum havanense ; ^1^3C NMR. ; havanine ; steroidal glycoalkaloids

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Biology , Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)84970-5

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Bestimmung des Vinylacetat-Gehaltes in EVA Copolymeren: Möglichkeiten und Grenzen der Anwendung MS-gekoppelter Analysenmethoden (1998)

Häuβler, L. ; Pompe, G. ; Albrecht, V. ; [et al.]

Springer

Journal of thermal analysis and calorimetry 52 (1998), S. 131-143

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ISSN: 1572-8943

Keywords: ethylene vinyl acetate copolymers ; determination of vinyl acetate content ; mass spectrometry ; pyrolysis gas chromatography ; simultaneous thermal analysis

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Ethylene vinyl acetate copolymers were investigated by means of simultaneous thermal analysis (STA) and pyrolysis gas chromatography (Py-GC). Both devices are coupled to a mass spectrometer (MS). STA-MS revealed that the calibration with poly(vinyl acetate) leads to sufficient accuracy in relation to the vinyl acetate (VA) content, because of the linear calibration plot. Quantitative determination of VA by means of Py-GC-MS was carried out at both 500 and 700°C. The calibration plot in this method was linear provided that the mass of VA did not exceed a critical value.