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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 205 (1964), S. 29-40 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary For the determination of chlorine in ultramicro amounts of nonvolatile organic compounds 1–10μg of the substance are measured by taking an aliquot of a solution of known strength. This aliquot is filled into a small quartz tube, the solvent is evaporated by blowing with a stream of filtered air, and the remaining substance is burnt in a stream of oxygen at 1000–1100° C. The HCl formed is absorbed in glacial acetic acid and titrated by help of differential electrolytic potentiometry. The relative standard deviation is ±1,5%. Quantities of N, P, S and F comparable to the amount of chlorine do not interfere. For the determination of chlorine in substances containing bromine and iodine silver electrodes are to be used.
    Notes: Zusammenfassung Zur Ultramikrobestimmung schwerfüchtiger organischer Stoffe werden 1–10 μg Substanz durch Lösungsteilung abgemessen und nach Entfernung des Lösungsmittels im Sauerstoffstrom bei 1000–1100°C verbrannt. Der gebildete Chlorwasserstoff wird in einer Vorlage in Eisessig absorbiert und argentometrisch titriert. Die Endpunktsanzeige erfolgt durch differentielle elektrolytische Potentiometrie mit AgCl-Elektroden. Die relative Standardabweichung beträgt 1,5%. Stickstoff-, P-, S- und F-Mengen in der Größenordnung des Chlorgehaltes verursachen keine Störungen. Bei brom- bzw. jodhaltigen Verbindungen müssen reine Silberelektroden verwendet werden.
    Type of Medium: Electronic Resource
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