Department of Drug Science and Technology, University of Torino, 10125 Torino, Italy.
Department of Chemistry, University of Torino, 10125 Torino, Italy.
Int J Environ Res Public Health. 2020 Jan 9;17(2):447. doi: 10.3390/ijerph17020447.
The inorganic component of hazelnuts was considered as a possible marker for geographical allocation and for the assessment of technological impact on their quality. The analyzed samples were Italian hazelnuts of the cultivar and Turkish hazelnuts of the cultivars , and . The hazelnuts were subjected to different drying procedures and different conservative methods. The concentration of 13 elements, namely Ba, Ca, Cu, Fe, K, Mg, Mn, Na, Ni, P, Sn, Sr and Zn, were quantified by inductively coupled plasma optical emission spectroscopy (ICP-OES). All the samples were previously digested in a microwave oven. Before proceeding with the analysis of the samples, the whole procedure was optimized and tested on a certified reference material. The results show that the inorganic component: (i) can represent a fingerprint, able to identify the geographical origin of hazelnuts, becoming an important quality marker for consumer protection; (ii) is strongly influenced by the treatments undergone by the investigated product during all the processing stages. A pilot study was also carried out on hazelnuts of the cultivar , directly harvested from the plant during early development to maturity and analyzed to monitor the element concentration over time.
榛子的无机成分被认为是其地理分配的可能标志物，也是评估技术对其质量影响的指标。分析的样本为意大利品种榛子和土耳其品种榛子，分别为 和 。榛子经过不同的干燥程序和不同的保存方法处理。采用电感耦合等离子体光学发射光谱法（ICP-OES）定量测定了 13 种元素，即 Ba、Ca、Cu、Fe、K、Mg、Mn、Na、Ni、P、Sn、Sr 和 Zn。所有样品均先用微波消解。在对样品进行分析之前，整个过程在认证的参考物质上进行了优化和测试。结果表明，无机成分：（i）可以代表一个指纹，能够识别榛子的地理来源，成为保护消费者权益的重要质量标志物；（ii）强烈受到所研究产品在所有加工阶段所经历的处理的影响。还对品种 的榛子进行了初步研究，该榛子直接从植物中收获，从早期发育到成熟进行分析，以监测元素浓度随时间的变化。
