基于放射性同位素的超处女橄油的地化学指纹
Samuel Pelacani1, Simone Tommasini2, Mattia Ferrari1
1Department of Earth Sciences, University of Florence, Florence, Italy.
The Science of the total environment
|June 18, 2025
概括
放射性 (Sr) 同位素比例 (87Sr/86Sr) 可以追溯到特黄橄油 (EVOO) 的地理来源. 这项研究建立了托斯卡纳基线,揭示了与其他地区不同的EVOO 87Sr/86Sr值.
科学领域:
- 地质化学 地质化学
- 食品科学 食品科学 食品科学
- 同位素分析的分析.
背景情况:
- 额外处女橄油 (EVOO) 的可追溯性对于食品的可持续性和真实性验证至关重要.
- 在认证之外,客观地评估EVOO的地理来源仍然是一个重大挑战.
- 放射性 (87Sr/86Sr) 同位素分析为确定来源提供了一个有希望的客观方法.
研究的目的:
- 为意大利托斯卡纳建立第一个全面的生物可用 (Sr) 同位素基线.
- 为了评估87Sr/86Sr比率作为EVOO地理可追溯性的指纹的有效性.
- 调查橄厂工艺对EVOO中Sr同位素特征的影响.
主要方法:
- 编制一个新型数据库的地质和有机87Sr/86Sr值 (n=133) 从托斯卡纳,整合新的和文献数据.
- 应用一个两组分混合模型 (橄果和自来水) 来评估EVOO中的Sr同位素来源.
- 使用地理信息学框架为托斯卡纳的高质量EVOO生产区域生成生物可用87Sr/86Sr异构图.
主要成果:
- 已确定的托斯卡纳 EVOO 87Sr/86Sr 值在 0.70854 到 0.70974.4 之间.
- 托斯卡纳 EVOO 的中位数 87Sr/86Sr (0.70911) 值高于突尼斯和西班牙北部 EVOO 的中位数.
- 这项研究证明了87Sr/86Sr作为EVOO的强大指纹的潜力,考虑到橄厂的工艺.
结论:
- 开发的87Sr/86Sr基线为托斯卡纳地区的EVOO地理可追溯性提供了一个强大的工具.
- 这项研究验证了用于来源研究的同位素签名的使用,提供了对关键通路的完整评估.
- 这些发现支持开发更复杂和客观的方法,以确保EVOO的真实性和来源.
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