Comprehensive Assessment of Essential and Potentially Toxic Trace Elements in Bovine Milk and Their Feeds in Different Agro-climatic Zones of Sri Lanka

被引:9
作者
Diyabalanage, Saranga [1 ]
Kalpage, Maheshika Darshani [2 ]
Mohotti, Dinithi Gayangi [3 ]
Dissanayake, Champa Kumari Kularatne [2 ]
Fernando, Ruchika [4 ]
Frew, Russell David [5 ]
Chandrajith, Rohana [3 ]
机构
[1] Univ Sri Jayewardenepura, Instrument Ctr, Fac Sci Appl, Nugegoda, Sri Lanka
[2] Sri Lanka Atom Energy Board, Orugodawatta, Wellampitiya, Sri Lanka
[3] Univ Peradeniya, Dept Geol, Fac Sci, Peradeniya, Sri Lanka
[4] Univ Peradeniya, Fac Vet Med & Anim Sci, Dept Vet Publ Hlth & Pharmacol, Peradeniya, Sri Lanka
[5] Univ Otago, Dept Chem, Dunedin, New Zealand
关键词
Bovine milk; Agro-climatic zones; Food safety; Inductively coupled plasma mass spectrometry; Se deficiency; CHRONIC KIDNEY-DISEASE; RAW-MILK; HEAVY-METALS; COWS MILK; COPPER-METABOLISM; SELENIUM; MINERALS; SHEEP; DIETS; LEAD;
D O I
10.1007/s12011-020-02242-4
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Fresh milk is an important source of essential mineral supplement for humans. However, the levels of trace elements in milk are an important component of its safety and quality. Trace elements also act as a bio-indicator of agricultural pollution. Samples of raw cow milk (n = 68), animal feed [forage (n = 36) and concentrates (n = 14)], and water (n = 35) were collected from different agro-climatic regions of Sri Lanka. The concentrations of 15 trace elements including toxic heavy metals such as Cd, Pb, and As were quantified using inductively coupled plasma mass spectrometry after microwave-assisted digestion. Among the studied trace elements, the mean elemental concentrations of Se, Cd, As, and Cu in cow milk were 18.1, 1.45, 7.35, and 71.7 mu g L-1, respectively. The mean concentrations of these elements in forage were 0.216, 0.066, 0.046, and 9.21 mg kg(-1), and in concentrate feed were 0.329, 0.202, 0.229, and 2.28 mg kg(-1), respectively. The As content of the studied milk was well below the maximum permissible level while 15% of the samples had Pb exceeding the permissible limit of 20 mu g L-1. However, As, Cd, and Pb levels in drinking water provided to animals were well below the WHO permissible limits. The results of this study revealed that the trace elements in cow milk depend mainly on the feed, and hence, levels of these contaminants in feed materials should be monitored. Although due to the consumption of milk, the populations have a minor exposure to trace elements and also minimum health risks, a detailed study with a large number of samples is highly recommended.
引用
收藏
页码:1377 / 1388
页数:12
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