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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 54 (1966), S. 202-227 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Verfasser berichten vergleichend über vier Methoden zur Mineralisierung organischer Verbindungen, deren Schwefelgehalt bestimmt werden soll, und zwar die Verbrennung in der Knallgasflamme, im Sauerstoffstrom im leeren Rohr, im Schönigerkolben und die reduktive Zerstörung mit Kalium im verschlossenen Röhrchen. Diese Methoden wurden mit der maßanalytischen Bestimmung des Sulfats bzw. Sulfids kombiniert. Daraus ergab sich, daß die Reduktion mit Kalium und die nachfolgende jodometrische Bestimmung des Sulfids am allgemeinsten anwendbar und am sichersten ist.
    Abstract: Résumé Four methods of mineralization of organic compounds are recalled and compared with respect to determining sulfur in them; they are the oxyhydrogen combustion method, combustion in oxygen, in an empty tube, or in a flask of the Schöniger type, and the reductive mineralization in a sealed tube by potassium. They are combined with the titration methods for the SO4 2− or S2− ions. This study has enabled the authors to select the reductive method of mineralization by means of potassium followed by the iodometric titration of S2− ions as the most general and most reliable among the various procedures.
    Notes: Résumé Les auteurs rappellent et comparent quatre méthodes de minéralisation des composés organiques en vue d'y doser le soufre: ce sont la méthode de combustion oxhydrique, la combustion dans l'oxygène, soit en tube droit vide, soit en fiole du type «Schöniger» et la minéralisation réductrice en tube scellé par le potassium. Ils les associent aux méthodes de titrage des ions SO4 2− ou S2−. Leur étude leur permet de sélectionner parmi les méthodes décrites la minéralisation réductrice par le potassium associée au titrage iodométrique des ions S2− comme la plus universelle et la plus sûre d'entre elles.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Czechoslovak journal of physics 19 (1969), S. 771-775 
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectral distribution and decay of the blue-green luminescence of AgCl has been measured at very low temperatures, using u.v. laser excitation. A structure was observed in the emission band at 77°K. The decay consists of three processes: a) a very fast process which follows the laser pulse (10−8 sec), b) a fast exponential process which is also observed with low intensity u.v. excitation,(τ∼10−4–10−5 sec) and, finally, c) a slow exponential process (τ∼seconds).
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 1968-11-01
    Print ISSN: 0024-4201
    Electronic ISSN: 1558-9307
    Topics: Biology , Chemistry and Pharmacology
    Published by Springer
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