Abstract

For the large producers of farmed fish, the utilization of fish by-products as ingredients of food is important and thus their characterization, in terms of chemical composition and safety, becomes necessary. In this study, eleven trace metal concentrations in by-products (head, gills, guts, trimmings, bones and skin) of two Mediterranean farmed fishes, the gilthead sea bream (Sparus aurata) and the meager (Argyrosomus regius) were determined by ICP-MS. According to overall concentrations, the sequence of trace metal levels in decreasing order was Fe > Zn > Mn > Cu > As > Cr > Pb > Ni > Cd > V>Co. Higher median concentrations (μg g⁻¹ d.w.) of As were determined in bones and guts (2.16 and 2.04), Cd, Co, Cu, Pb in guts (0.175, 0.058, 16.3, 0.381), Cr in skin and bones (1.51 and 1.45), Ni in guts and skin (0.231, 0,218), Fe and Mn in gills (50.1, 16.8) and V in trimmings (0.052). Trace metal levels determined in fish feed were considerably lower compared to EC limits (Directive 2002/32/EC). The highest bioconcentration factor (BCF) values were calculated for Cd, Ni, Pb in muscle, for Fe, Mn, Zn in gills, for Cd, Co, Cu, Zn in guts and for Cr in bones. Exploitation of fish by-products as additives in food industry appears feasible, based on the concentrations of metals examined.

摘要

对于养殖鱼的大型生产者而言，利用鱼副产品作为食品成分很重要，因此就化学成分和安全性而言，对其进行表征非常必要。在这项研究中，ICP测定了两种地中海养殖鱼类，金头鲷（Sparus aurata）和微薄鱼类（Argyrosomus regius）的副产品（头部，腮，内脏，饰物，骨头和皮肤）中的11种微量金属浓度。-多发性硬化症。从总浓度来看，痕量金属的含量从高到低依次为：Fe> Zn> Mn> Cu> As> Cr> Pb> Ni> Cd> V> Co。更高的中位数浓度（微克g ^-1dw）的含量在骨骼和内脏（2.16和2.04）中测定，镉，钴，铜，铅在内脏中的含量（0.175、0.058、16.3、0.381），皮肤和骨骼中的Cr（1.51和1.45），内脏中的Ni和皮肤（0.231，0,218），Fe中的Fe和Mn（50.1，16.8），修剪中的V（0.052）。与EC限值相比，鱼饲料中测定的痕量金属含量要低得多（指令2002/32 / EC）。对于肌肉中的Cd，Ni，Pb，腮中的Fe，Mn，Zn，内脏中的Cd，Co，Cu，Zn和骨骼中的Cr，计算出最高的生物富集因子（BCF）值。根据所检查的金属浓度，在食品工业中利用鱼类副产品作为添加剂似乎是可行的。