Simultaneous differential pulse polarographic determination of cadmium, lead, and copper in milk and dairy products


TOKUSOGLU O., AYCAN S., Akalin S. , KOCAK S., ERSOY N.

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, cilt.52, ss.1795-1799, 2004 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 52 Konu: 7
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1021/jf034860l
  • Dergi Adı: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
  • Sayfa Sayıları: ss.1795-1799

Özet

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.