葡萄中的糖和酸的确定必须使用小型近红外光谱学
Lucie Cornehl1, Julius Krause2, Xiaorong Zheng1
1Julius Kühn Institute (JKI), Federal Research Centre of Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, 76833 Siebeldingen, Germany.
Sensors (Basel, Switzerland)
|June 10, 2023
概括
近红外光谱仪准确地测量了葡萄汁中的糖和酸含量,使收割机上的质量控制成为可能. 这项技术支持高效的葡萄酒生产,并通过确保葡萄的质量来减少经济损失.
科学领域:
- 农业工程 农业工程
- 分析化学 分析化学
- 葡萄种植 葡萄种植 葡萄种植
背景情况:
- 准确的葡萄汁分析对于葡萄酒的质量和支付至关重要,尤其是在德国的葡萄酒合作社.
- 目前用于确定糖和酸含量的方法耗时,昂贵,并可能导致经济损失.
- 近红外 (NIR) 光谱是一种用于分析生物样本的多功能技术.
研究的目的:
- 评估一个小型的NIR光谱原型,用于自动确定葡萄末成分.
- 评估将这项技术整合到收获过程中的可行性,以实时进行质量控制.
- 通过在不符合质量参数的情况下提前结束收获,改善酒物流并减少经济损失.
主要方法:
- 使用了一种带流电池的半自动NIR光谱仪器 (1100-1350nm).
- 在2021年整个生长季节,在德国莱兰普拉提纳州,分析了来自四种*Vitis vinifera* (L.) 品种的末样本.
- 使用高性能液态色谱 (HPLC) 来确定葡萄糖,果糖,酸和酸含量. 化学测量方法 (部分最小平方回归,离开-一个-输出交叉验证) 用于数据分析.
主要成果:
- 在所有测试品种中,NIR系统为总糖 (R2 = 89.26%) 和酸 (R2 = 91.10%) 提供了良好的估计.
- 葡萄糖 (R2 = 89.45%) 和果糖 (R2 = 89.08%) 的预测准确度相似.
- 虽然酸预测仅对两种品种成功,但对于所有四种品种,酸和糖的预测始终准确.
结论:
- 微型的NIR原型显示了葡萄的关键质量参数 (糖,酸) 的高预测准确性.
- 这项技术有可能集成到葡萄收割机中,从而实现在收获期间的自动实时质量评估.
- 成功实施可以优化酒物流,改善葡萄酒合作社的支付基础,并最大限度地减少因葡萄质量不足而造成的经济损失.
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