Determination of Micro minerals in Milk from Farm and Pasture-reared Cow, Goat and Camel; using Inductively Coupled Plasma-Optical Emission Spectrometry

Abstract

This study covers raw fresh milk of cow, goat and camel (farm and pasture-reared), in addition to two brands of commercial milk samples, liquid milk of powder origin and drinking yoghurt samples. Camel milk showed a relatively lower pH range (6.15 -6.46) compared cow, goat and commercial milk. The pH of drinking yoghurt was found (4.35 -4.47).Microwave digestion, was selected followed by mineral analysis using Inductively Coupled Plasma-Optical Emission Spectrometry. Micro minerals; Cd, Cr, Cu, Fe, Mn and Pb, ranged from not detected to 23.4+0.52mg/L for Fe while Sr (0.32+0.005 -2.51+0.043 mg/L) and Zn (1.58+0.01 -8.91+0.14 mg/L) in all milk samples.

Mineral status in camel milk: a critical review

“…In Kazakhstan ( Meldebekova et al, 2008 ), zinc concentration seemed in higher quantity in fermented milk (1180 µg/100 mL) compared to raw milk from the same sample (370 µg/100 mL). Similar observations were done regarding zinc in camel yoghourt compared to raw milk: 250 vs. 482 µg/100 mL on average ( Elhardallou and El-Naggar, 2016 ). Copper concentration (as zinc and iron) increased by a factor 5 during ultrafiltration process ( Mehaia, 1996 ).…”

“…Compared to other species, CM contained particularly more strontium. In the reference of Elhardallou and El-Naggar (2016) , mean value for chromium was higher (193 ng/mL) but not strontium (151 ng/mL).…”

“…Like for other elements, data regarding iron content in CM are highly variable between references with contradictory observations regarding the comparison with milk from other species ( Faye and Bengoumi, 2018 ). For example, between the data of Elhardallou and El-Naggar (2016) and that of Elamin and Wilcox (1992) , the gap is in a ratio of around 1/700: 0.49 and 341 mg/100 mL respectively. In the old reference of Sawaya et al (1984) , even lower value was reported: 0.26 mg/100 mL.…”

Manganese levels in infant formula and young child nutritional beverages in the United States and France: Comparison to breast milk and regulations

“…In this study, one of the products based on goat milk did not have supplemental Mn; however, it also contained chocolate, so the effect of goat milk on total Mn concentration could not be assessed from this set of samples. Prior surveys suggest that the Mn concentration of goat milk is comparable to that of cow milk [100,108–110]; similarly, the Mn concentration of goat-milk based formulas has been shown to be comparable to that of cow-milk based formulas [96].…”

Assessment of Aspartame Exposure Due to Consumption of Some Imported Chewing Gums by Microwave Digestion and High Performance Liquid Chromatography Analysis

“…The widespread use of microwave to dissolve samples is gradually replaced by the conventional pressure reactors that particularly are suitable for the determination of organic and inorganic analytes 8,9 . There were reported some microwave digestion methods which are mainly applied for extraction of minerals from food matrices [10][11][12] . Microwave extraction is one of the extraction methods based on the warming in a closed vessel containing oxidizing agents.…”