稀土元素在意大利的变化 意大利阿布鲁佐地区的特级处女橄油
Alessandro Chiaudani1, Federica Flamminii1, Ada Consalvo2
1Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy.
Foods (Basel, Switzerland)
|January 11, 2024
概括
这项研究描述了阿布鲁佐州使用稀土元素 (REEs) 打击欺诈性标签的特级初橄油. 结果显示了一个统一的REE模式,收获年轻微影响了成分,有助于原产地保护.
科学领域:
- 食品化学 食品化学
- 分析化学 分析化学
- 地质化学 地质化学
背景情况:
- 额外处女橄油 (EVOO) 的地理标签欺诈行为正在增加.
- 保护EVOO来源需要强大的方法,理想情况下是基于内在化学成分.
- 稀土元素 (REEs) 为化学指纹提供了一个潜在的工具.
研究的目的:
- 使用REEs进行阿布鲁佐EVOO的初步化学表征.
- 调查品种,原产地和年份对REE组成的影响.
- 评估REEs在验证EVOO地理来源方面的潜力.
主要方法:
- 使用ICP-MS (诱导合等离子体质谱法) 来量化EVOO样本中的REEs.
- 应用了化学测量技术,包括主要成分,分离剂和集群分析.
- 样本代表了不同的橄品种,阿布鲁佐地区的地理来源和三个收获年份.
主要成果:
- 在大多数Abruzzo EVOOs中观察到一个统一的REE模式,Y,La,Ce和Nd具有强烈的相关性.
- 在一些样本中检测到欧和.
- 收获年对REE组成有轻微的影响,而不是品种或原产地.
结论:
- REE的组成,特别是Y,La,Ce和Nd,显示出Abruzzo EVOO的特征潜力.
- 收获年份的轻微影响表明橄系统,气候和土壤化学之间的相互作用.
- 经过REE分析,可以改善EVOO的地理原产地保护的有希望的途径.
相关概念视频
Variability: Analysis
143
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
The range is a simple measure of variability, indicating the difference between the highest and...
143
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
1.2K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.2K
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
474
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
474
Atomic Absorption Spectroscopy: Lab
442
For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
442
Fineness Modulus
410
The fineness modulus (FM) of aggregate is a numerical index that measures the coarseness or fineness of the particles. It is calculated by adding the cumulative percentages of aggregate retained on each of a specified series of sieves and dividing the sum by 100.
Consider performing sieve analysis on sand through a set of ASTM sieves. The weight of aggregate retained in each sieve and pan placed at the bottom is recorded, as given in Column B of Table 1.
To determine the fineness modulus of...
Consider performing sieve analysis on sand through a set of ASTM sieves. The weight of aggregate retained in each sieve and pan placed at the bottom is recorded, as given in Column B of Table 1.
To determine the fineness modulus of...
410
Specific Gravity of Aggregate
268
Aggregates typically contain pores, which can be either permeable or impermeable. Considering the pores in the aggregates, the specific gravity of aggregates is defined in three different forms, namely, bulk or gross specific gravity, apparent specific gravity, and absolute specific gravity.
Bulk or gross specific gravity is calculated by taking the ratio of the mass of aggregates in the saturated surface-dry state to the total volume that includes both the solids and the voids within the...
Bulk or gross specific gravity is calculated by taking the ratio of the mass of aggregates in the saturated surface-dry state to the total volume that includes both the solids and the voids within the...
268


