Simultaneous differential pulse polarographic determination of cadmium, lead, and copper in milk and dairy products
Articles > Article · 2004
Authors: O TOKUSOGLU, S AYCAN, Ayşe Sibel AKALIN, S KOCAK, N ERSOY
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, Journal Indexed in SCI Expanded, International, 2004, vol 52, pp 1795-1799
DOI: 10.1021/jf034860l
Summary
The contents of potentially toxic elements lead and cadmium and the essential element copper in various milk and dairy products consumed in Turkey were determined by differential pulse polarography (DPP), primarily to assess whether the intakes comply with recommended desired concentrations for essential and permissible levels for toxic elements. A simple and rapid DPP method has been developed for the simultaneous determination of cadmium, lead, and copper in samples. Using the differential pulse mode, half-wave peak potentials as E-1/2 were -0.58, -0.40, and -0.07 V for cadmium (Cd), lead (Pb), and copper (Cu), respectively. Marketed formulations of dairy products have been analyzed by calibration and standard addition methods. Recovery experiments were found to be quantitative. The linear domain ranges were 0.00-674.28 mug/L for Cd (R-2 = 0.9999), 0.19-2.94 mg/L (p < 0.01) for Pb (R-2 = 0.9997), and 0.41 -133.46 mug/L for Cu (p < 0.01) (R-2 = 0.9999). The studies have shown that the method is a rapid, reproducible, and accurate determination of these elements in milk and dairy products and can be used in the analysis of marketed formulations in the milk and dairy industry.