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  • Best. von Isoniazid, Oxalyldihydrazid, Hydrochinon, Resorcin, organ. Verbindungen  (1)
  • 1
    ISSN: 1618-2650
    Keywords: Best. von Isoniazid, Oxalyldihydrazid, Hydrochinon, Resorcin, organ. Verbindungen ; coulometrische Titration ; Silber(II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Conditions are described for the efficient generation of silver(II) and the titration of organic compounds by electrogenerated silver(II). An electrolyte of 0.1 M silver nitrate and 5 M nitric acid at −10°C is used, with a gold generating anode and a current density of 1.5–5 mA/cm2. A potentiometric (platinum-S.C.E. pair) or biamperometric (platinum electrodes, 200 mV) end point detection is used. For potentiometric detection, the platinum electrode is preconditioned with AgO in nitric or by anodization. The compounds isoniazid, oxalyldihydrazide, hydroquinone, and resorcinol were titrated down to sub-milligram quantities with errors of 1–2%.
    Notes: Zusammenfassung Der verwendete Elektrolyt besteht aus 0,1 M Silbernitrat in 5 M Salpetersäure bei −10°C. Die Generatoranode besteht aus Gold (Stromdichte 1,5–5 mA/cm2). Die Bestimmung des Endpunkts erfolgt potentiometrisch (Pt/SKE) oder biamperometrisch (Pt-Elektroden, 200 mV). Für die potentiometrische Bestimmung wird die Indicatorelektrode mit einer Lösung von AgO in Salpetersäure oder durch elektrochemische Anodisierung vorbehandelt. Folgende Substanzen wurden bis herab in den sub-Milligramm-Bereich mit Fehlern von 1–2% titriert: Isoniazid, Oxalyldihydrazid, Hydrochinon, Resorcin.
    Type of Medium: Electronic Resource
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