Acta Periodica Technologica 2016 Issue 47, Pages: 51-62
https://doi.org/10.2298/APT1647051P
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Macro- and micro-element analysis in milk samples by inductively coupled plasma-optical emission spectrometry
Petrović Sanja M. (Faculty of Technology, Leskovac)
Savić Saša R. (Faculty of Technology, Leskovac)
Petronijević Živomir B. (Faculty of Technology, Leskovac)
The paper describes the determination of Ag, Al, B, Ba, Bi, Ca, Cd, Co, Cr,
Cu, Fe, Ga, In, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Tl and Zn, as well as total
fat content of milk samples, originated from different sources. The analyzed
milk samples were: human milk, fresh cow milk, pasteurized cow milk from a
local market, and reconstituted powder milk. The milk samples were obtained
from Jablanica District (Serbia) territory. Preparation of samples for macro-
and micro-analyses was done by wet digestion. Concentrations of the elements
after digestion were determined by inductively coupled plasma optical
emission spectrometry (ICP-OES). Total fat content of milk samples was
determinate by the Weibull and Stoldt method. The results showed that
potassium and calcium concentrations were the highest in all samples: 1840.64
- 2993.26 mg/L and 456.05 - 1318.08 mg/L, respectively. Of all heavy metals
from the examined milk samples (copper, zinc, manganese, nickel, cadmium, and
lead), the most common were zinc and copper, with approximately similar
content in the range of 5 - 12 mg/l, while cadmium nickel and manganese were
not detected at all. Samples of fresh cow milk and human milk showed the
highest fat content of 3.6 and 4.2 %, respectively. Results for total fat and
macro- and micro-analyses showed that fresh cow milk has the highest contents
of fat and calcium, making it the most nutritious.
Keywords: milk, ICP-OES, minerals, fat
Projekat Ministarstva
nauke Republike Srbije, br. TR 34012