Simultaneous determination of copper, lead and zinc in wine by differential-pulse polarography

The Analyst ◽  
1978 ◽  
Vol 103 (1229) ◽  
pp. 868 ◽  
Author(s):  
Paolo Bruno ◽  
Maurizio Caselli ◽  
Annibale Di Fano ◽  
Carlo Fragale
Keyword(s):  
Simultaneous Determination ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Lead And Zinc ◽  
Pulse Polarography ◽  
Determination Of Copper ◽  
Copper Lead

Simultaneous determination of copper, lead, cadmium, zinc, and selenium in cow liver by differential pulse polarography

2003 ◽  
Vol 81 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Güler Somer ◽  
Gülbeniz Guliyeva ◽  
Güler Ekmekci ◽  
Olcay Sendil
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Simultaneous Determination ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Synthetic Sample ◽  
Simple Method ◽  
Pulse Polarography ◽  
Copper Lead

A fast and simple method was established for the determination of trace elements in liver. DP polarograms of wet digested liver samples were taken in acetate buffer, pH about 4, for lead, cadmium, and zinc determinations. For copper, addition of EDTA at pH 4 was needed for a better separation from the iron peak. Selenite ion was determined using the hydrogen catalytic peak after the addition of Mo(VI) to the same solution. Trace element levels were different for two separate sections of liver. For the first section (S1) the quantities were found to be 8.12 ± 0.21 mg g–1 Cu, 1.16 ± 0.12 mg g–1 Zn, 1.09 ± 0.11 mg g–1 Cd, 0.59 ± 0.07 mg g–1 Pb, and 2.05 ± 0.22 mg g–1 Se, in dry liver. For the second section (S2) the results were the same for selenium, but Cd was too small to be detected. The other trace element quantities were 0.48 mg g–1 Cu, 0.22 mg g–1 Pb, and 0.29 mg g–1 zinc. The validity of the method was demonstrated with a synthetic sample resembling liver composition. This method enabled the simultaneous determination of heavy trace elements such as copper, lead, cadmium, molybdenum, selenium, and zinc by using an inexpensive instrument and without any separation or pre-concentration procedures.Key words: cow liver, determination, differential pulse polarography, trace elements.

Determination of Copper, Nickel, and Chromium in Foods

1983 ◽  
Vol 66 (3) ◽  
pp. 620-624
Author(s):  
Walter Holak
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Atomic Absorption Spectrophotometry ◽  
Differential Pulse Polarography ◽  
National Bureau ◽  
Pulse Polarography ◽  
Digestion Technique ◽  
Determination Of Copper

Abstract A collaboratively studied method for Pb, Cd, As, Se, and Zn that uses a closed system digestion technique has now been extended to include 3 additional elements, Cu, Ni, and Cr. Cu is determined by either atomic absorption spectrophotometry or anodic stripping voltammetry, depending on the concentration. Ni and Cr are determined by differential pulse polarography. Analysis of National Bureau of Standards reference materials by this procedure gives values in close agreement with the accepted values. Recoveries from applesauce and chicken spiked at 0.6-4 μg/g are in the 92-101% range. The sensitivity of the multielement procedure is 0.34,0.14, and 0.24 μg/g for Cu, Ni, Cr, respectively, at the 90% confidence level.

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