Department of Animal Production and Biotechnology, Faculty of Agrobiotechnical Sciences Osijek, J. J. Strossmayer University of Osijek, Osijek, Croatia.
Department of Animal Science and Technology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia.
Chemosphere. 2020 Dec;261:128128. doi: 10.1016/j.chemosphere.2020.128128. Epub 2020 Aug 27.
There is an increased production and demand for ewes' milk in the Republic of Croatia, as well as globally. There is also a growing concern about its quality, since milk from farm animals may become contaminated with mercury and other toxic elements. Thus, the aim of this paper is to determine the influence of lactation stage on the ewes' milk quality in western Croatia by considering concentrations of mercury and other elements in ewes' milk. The research was conducted on 36 Travnik pramenka sheep during different lactation stages. The digested milk samples were analysed with continuous flow hydride generation technique by using inductively coupled plasma mass spectrometry. Samples were taken during 40th, 80th and 120th d of lactation. Yield and quality of ewes' milk was within lactation curve. As lactation progressed, significantly lower concentrations of Hg (on 80th d compared to 40th d) and of Cd (120th d compared to 80th d) were noted, and Hg on 120th d was below the detection limit. Concentrations of Ca and Cu were lower on the 120th d compared to 40th d, while P, Mg, Fe, Zn, Mn, and Se were lower on the 80th and 120th d compared to the 40th d. Concentrations of K, Mo, and Cr differed among all stages of lactation. Regarding toxic elements, the observed low concentrations of Hg, Co, Cd and As suggest that ewes' milk in western Croatia is safe for human or animal consumption.
在克罗地亚共和国乃至全球，对奶绵羊奶的需求和产量都在增加。人们也越来越关注其质量，因为来自农场动物的奶可能会受到汞和其他有毒元素的污染。因此，本文的目的是通过考虑奶绵羊奶中汞和其他元素的浓度，来确定克罗地亚西部哺乳期对奶绵羊奶质量的影响。该研究在不同哺乳期对 36 只 Travnik pramenka 绵羊进行。使用电感耦合等离子体质谱法通过连续流动氢化物发生技术对消化后的奶样进行分析。在哺乳期的第 40、80 和 120 天分别采集样本。奶绵羊奶的产量和质量都在哺乳期曲线内。随着哺乳期的进行，Hg（第 80 天比第 40 天）和 Cd（第 120 天比第 80 天）的浓度显著降低，第 120 天的 Hg 浓度低于检测限。与第 40 天相比，第 120 天的 Ca 和 Cu 浓度较低，而 P、Mg、Fe、Zn、Mn 和 Se 的浓度在第 80 天和第 120 天比第 40 天低。K、Mo 和 Cr 的浓度在哺乳期的所有阶段都不同。关于有毒元素，观察到的低浓度 Hg、Co、Cd 和 As 表明克罗地亚西部的奶绵羊奶适合人类或动物消费。
