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Determination of lead, copper, and cadmium in wine and beer by potentiometric stripping analysis

✍ Scribed by Daniel Jagner; Stig Westerlund

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
450 KB
Volume
117
Category
Article
ISSN
0003-2670

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✦ Synopsis

Instrumentation and analytical procedures for the direct determination of lead, copper and cadmium in alcoholic beverages in the concentration range I.-100 rJg I-' are outlined.

The results are discussed with respect to detection limit, precision and time for analysis.

Comparison with results obtained with atomic absorption spectrometry showed discrepancies of less than 15%.

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A computerized system for potentiometric stripping analysis made o f commercially available components with corresponding software is described. Application t o the determination o f lead in wines and vinegars is also reported. \* ASYST is 3 specilk software from Macmill:in softw:ire.

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Coulometric stripping potentiometry has been used to achieve calibration-free determinations of Cu(II), Zn(II), Cd(II) and Pb(II) in tap water samples. With the coulometric approach, interference from the formation of Cu-Zn intermetallic compounds (CuZn x ) on the quantification of Zn(II) was circum