在酒精饮料中通过稀释和射击分子排放光谱法与溶液阳极发光放电激发源的快速乙醇测定
Krzysztof Gręda1, Klaudia Kowalczyk1, Monika Zabłocka-Malicka1
1Wroclaw University of Science and Technology, Faculty of Chemistry, Division of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50-370 Wrocław, Poland.
Food chemistry
|June 7, 2025
概括
使用分子排放光谱法 (MES) 的新方法可以快速准确地分析饮料中的乙醇. 这种高通量技术简化了样品制备,并准确量化了乙醇含量.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 精确的乙醇测定对于饮料行业的质量控制至关重要.
- 传统方法通常需要复杂的样本准备,限制吞吐量.
研究的目的:
- 开发一种高通量分子排放光谱法 (MES) 方法,用于快速确定乙醇.
- 为了评估方法的精度,检测极限,线性和矩阵效应阻力.
主要方法:
- 样品被稀释并直接引入溶液阳极发光放电 (SAGD) 系统.
- 通过在206.8nm处测量CO分子带来量化乙醇.
- 一种稀释和射击方法实现了每小时50个样本的分析吞吐量.
主要成果:
- 获得了高精度 (1-3%) 和低检测极限 (0.005%v/v).
- 观察到高达0.6%v/v的优异线性和对矩阵效应的强烈抗性.
- 对各种酒精饮料 (相对误差 -1.7%至+7.0%) 确认了与氧化还原定位的良好一致性.
结论:
- 开发的SAGD MES方法为酒精饮料中乙醇的确定提供了快速,精确和准确的方法.
- 该方法消除了样品蒸的需要,并显示了分析其他挥发性有机化合物的潜力.
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