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  • 1
    Electronic Resource
    Electronic Resource
    Simple apparatus for trace analysis of toxic heavy metals. Determination of cadmium and lead by manual d. c. polarography (1976)
    Springer
    Microchimica acta 66 (1976), S. 253-263 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein einfaches, von Hand zu bedienendes Gerät für die Gleichstrom-polarographie wurde beschrieben, das sich aus üblichen Laboratoriums-einrichtungen zusammenstellen läßt. Dessen Empfindlichkeit ist auf ± 0,5 mV Spannung bzw. ± 0,005μA Stromstärke einstellbar. ppm-Mengen Cd und Pb in Nahrungsmitteln und Getränken lassen sich hiermit bestimmen.
    Notes: Summary A simple manual d. c. polarographic apparatus is described which can be assembled from ordinary laboratory equipment. The sensitivity of this apparatus can reach ± 0.5 mV in voltage and ± 0.005μA in current. Using this set up, trace amounts of cadmium and lead in foods and beverages can be determined at the ppm region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01220267
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Trace analysis of toxic metals, III. Determination of chromium as trivalent chromium by differential pulse polarography (1988)
    Springer
    Microchimica acta 96 (1988), S. 167-174 
    Details
    ISSN: 1436-5073
    Keywords: trace analysis ; toxic metal ; chromium ; polarography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Methods for trace analysis of chromium as Cr3+ were investigated, using differential pulse polarography in various media. Determination at the ng/ml-μg/ml range can be carried out in KCl/HCl, KCNS/HOAc, and other media. Total concentration of chromium in a solution containing Cr3+ and HCrO 4 − can be determined in KCNS/HOAc, and it is found that HCrO 4 − can be converted quantitatively to Cr3+. The relative quantity of HCrO 4 − and Cr3+ can be determined by the difference between the total chromium concentration and the concentration of HCrO 4 − . The sensitivity (12.5 ng/ml) and accuracy of this method is better than the method that determines total chromium as HCrO 4 − .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01236101
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Trace analysis of toxic metals. I (1980)
    Springer
    Microchimica acta 74 (1980), S. 291-300 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein einfaches Verfahren zur amperometrischen Bestimmung von Mikrogrammengen Pb, Hg, Cd und Tl durch Titration mit ÄDTA wurde beschrieben. Bei Verwendung von 0,5 ml Probelösung und 10−5 M ÄDTA-Lösung können die genannten Metallionen in der Größenordnung von 1 ppm bestimmt werden. Die Genauigkeit beträgt ±5%.
    Notes: Summary A simple procedure for the amperometric determination of lead, mercury, cadmium and thallium in theμg range by titration with EDTA is described. Using 0.5 ml of the test solution and 10−5 M EDTA, the minimum quantity of these metal ions that can be determined is about 1 ppm. The accuracy is within ±5%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196454
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Organic functional group analysis at the micromole level. II (1977)
    Springer
    Microchimica acta 67 (1977), S. 325-334 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mikromol-Mengen aromatischer Ketone lassen sich nach einem einfachen Verfahren der Gleichstrompolarographie bestimmen. Binäre Gemische wie z. B. Benzophenon-Acetophenon oder Benzophenon-p-Methylacetophenon kann man nebeneinander analysieren.
    Notes: Summary This paper demonstrates thatμ-mol amounts of aromatic ketones can be conveniently determined by means of a simple d. c. polarographic procedure. Binary mixtures such as benzophenone-acetophenone and benzophenone-p-methylacetophenone can be simultaneously determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213043
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Trace analysis of toxic metals. II Determination of lead, mercury, cadmium and thallium in foods by amperometry and by atomic absorption spectrometry (1982)
    Springer
    Microchimica acta 78 (1982), S. 337-346 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Gemüse, Konserven und Seefische wurden analytisch mit Amperometrie und AAS auf Pb, Hg, Cd und Tl untersucht. Um die Konzentration der einzelnen Metallionen zu bestimmen, wurden bei der amperometrischen Titration Maskierungsmittel verwendet. Die Ergebnisse der beiden Methoden stimmen gut überein.
    Notes: Summary Vegetables, canned food, and marine fishes were analyzed for lead, mercury, cadmium and thallium by amperometry and by atomic absorption spectrometry. Masking agents were used in the amperometric titration procedure in order to determine the concentration of the individual metal ions. The results from these two methods have been compared and found to be in good agreement with each other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197983
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Pressure and Temperature Coefficients of Electrode ProcessesLecture presented to the GDCh-Working Group „Applied Electrochemistry“ at Jülich (Germany), October 13-15, 1971. (1972)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 44 (1972), S. 216-218 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Whilst the theoretical description of electrode processes is mainly concerned with thermodynamic functions such as energy, enthalpy, entropy and volume, very few experimental determinations of these important quantities have been made. This paper describes the theoretical significance of experimental values of the temperature and pressure coefficients of electrode processes. Particular importance is attached to (1) the equilibrium surface excess volumes and entropies and (2) the real and ideal activation parameters associated with charge-transfer reactions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330440423
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    Paper (German National Licenses)
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