Pederiva Sabina, Crescio Maria Ines, Ingravalle Francesco, Abete Maria Cesarina, Marchis Daniela, Squadrone Stefania
Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Chemistry Department, CReAA, via Bologna 148, Turin, Italy.
Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Chemistry Department, CReAA, via Bologna 148, Turin, Italy.
J Trace Elem Med Biol. 2022 May;71:126959. doi: 10.1016/j.jtemb.2022.126959. Epub 2022 Feb 21.
Processed animal products (PAPs) could be a great alternative to common protein supplements and represent a good example of recycling and valorization of by-products. Due to the reintroduction of certain types of PAPs in feed, a deeper knowledge of these heterogeneous matrices is needed. Thus, the aim of this study is to evaluate the levels of essential elements and inorganic contaminants in 55 PAPs considered as potential alternatives to common protein supplements.
PAPs samples were analysed for essential (cobalt, nickel, chromium, copper, zinc, iron and manganese) and non-essential elements (arsenic, cadmium, lead and mercury) by Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Graphite Furnace Atomization Atomic Absorption Spectrometer (GF-AAS) and dual cell Direct Mercury Analyzer spectrometer (DMA-80).
Essential elements were found with the following decreasing order iron>zinc>copper>manganese>chromium>nickel>cobalt (mg kg). Only one sample was found non-compliant to lead concentration according to the European Union Regulation while negligible values of others non-essential elements were found.
This study suggests that PAPs could be a useful supplement for animal diet due to their natural content of essential elements. A careful monitoring of chemical elements should be required and eventually guidelines have to be drafted for a correct use of PAPs to ensure a safe and sustainable feed production.
加工动物产品（PAPs）可能是常见蛋白质补充剂的一个很好的替代品，并且是副产品回收和增值的一个很好的例子。由于某些类型的PAPs重新被引入饲料中，需要对这些异质基质有更深入的了解。因此，本研究的目的是评估55种被视为常见蛋白质补充剂潜在替代品的PAPs中必需元素和无机污染物的含量。
通过电感耦合等离子体质谱仪（ICP-MS）、石墨炉原子化原子吸收光谱仪（GF-AAS）和双池直接测汞分析仪（DMA-80）对PAPs样品中的必需元素（钴、镍、铬、铜、锌、铁和锰）和非必需元素（砷、镉、铅和汞）进行分析。
发现必需元素的含量顺序为铁>锌>铜>锰>铬>镍>钴（mg/kg）。根据欧盟法规，仅发现一个样品的铅浓度不符合规定，而其他非必需元素的含量可忽略不计。
本研究表明，由于PAPs中天然含有必需元素，它们可能是动物饲料的一种有用补充剂。应仔细监测化学元素，并最终制定指导方针，以正确使用PAPs，确保安全和可持续的饲料生产。
