在检查混合饮料的质量时,可滴定的酸度和brix是常见的措施。特别是对于软饮料,可滴定的酸度是评估饮料浓度并检查许多酸性防腐剂的水平是否合适的好方法。1
图片来源:Shutterstock / Lukas Gojda
通常,在发酵过程中控制酒精水平并评估潜在的葡萄酒质量是通过可滴定酸度与布里斯水平的比例来完成的。2结合brix和可滴定酸度的测量方法可用于评估酒精饮料的潜在质量或表明基于水果的饮料的成熟度。
在饮料加工或混合过程中测量可滴定酸度和brix的最佳方法
最初,假设果汁仅仅是糖和水的组合,则比重计是测量糖水平(Brix)的首选仪器。
Now, to account for the presence of organic acids and other species as well as the sucrose, process density meters, flow meters and refractometers are all used, and calibrations are performed.
进行酸碱滴定以测量可滴定的酸度。该滴定不能作为过程的一部分进行,并且是一种缓慢的手动方法,需要去除批次进行分析。这些措施消耗了大量的操作员时间以及在实验室环境中进行采样和测试。
A powerful alternative to these cumbersome methods is offered by拉曼光谱法which can be used as a type of process analytical technology. This technique is ideal to build up a picture of the full chemical profile of the drink in question and directly identify the presence and amount of different sugars and acidic species.
Raman Spectroscopy
拉曼光谱对化学物种和材料进行定量和定性分析的一种非常强大的技术,包含有关该分子独特振动模式的信息。亚博网站下载
In every molecular species, there are chemical bonds that join together the atoms present in the molecule. However, the atoms in a bond are constantly oscillating back and forth, so the atoms in a molecule are never still. The strength of the bond between the atoms, and the masses of the atoms at either end, are proportional to the frequency of that oscillation.
通过恢复分子振动模式的信息,提供了有关分子结构的信息。
许多分子具有单个分子独有的频率模式,被称为分子“指纹”,因为化学环境中的扰动甚至很小,也会导致振动频率的变化。
拉曼光谱法can therefore be used to identify a molecule using the characteristic series of vibrational frequencies, but the magnitude of the Raman bands can also be used to identify how much of a given species is present and for quantitative analysis.
拉曼光谱法- particularly its short acquisition times - can be used as a real-time process monitoring and control technique.
过程控制
拉曼光谱法can be used to monitor ingredients for beverage blending and filling process equipment. Considering both potential acidity and alcohol levels, Raman spectroscopy is commonly used as a process analytical technology to monitor wine production.
拉曼光谱法可以通过玻璃杯来监测瓶中的葡萄酒的演变3或用于直接接触测量 - 将探针浸入过程设备中。app亚博体育
tec5USA Raman Spectrometers
为了作为用于brix和可滴定酸度监测的拉曼光谱仪,光谱仪必须能够处理广泛的化学物种浓度,能够短暂获取时间,并且没有荧光背景淹没的拉曼信号。
TEC5USA在线分析光谱仪开发的市场领先专家,使用OEM产品提供特定于客户的解决方案。4
tec5USA offers a拉曼探测器that can be immersed directly in the product line for beverage blending and filling equipment. The Raman probe is suitable for semi-permanent installation within a CIP loop because it is built with a tri-clamp fitting and 3-A certification.
因此,拉曼仪器可以安装到过程线中,并以最少的停机时间提供有关产品质量的持续反馈。
TEC5USA具有一组仪器组合,可用于测量弱酸的结合碱基(用于滴定酸度测量的替代方法),以及咖啡因,糖和任何污染物物种的潜在存在。
TEC5USA提供了高度复杂的化学计量溶液套件来监测产品的演化,因为饮料化学上很复杂,在线过程控制需要实时数据分析以有效地使用从拉曼光谱中提取的信息。
没有操作员需要做任何事情,此分析就可以提供有关Brix和产品风味概况等措施的大量信息。
使用在线拉曼分析有很多好处。其中包括分析所需的实验室测试数量,可以删除处理中抽样点的能力,从而使用户可以在过程数据上做出实时决策,甚至可以设置自动化过程控制反馈系统。
为了找出Tec5USA的产品组合如何组合拉曼光谱仪和化学计量学软件可以改善饮料制造中的过程控制,请立即与他们的团队联系。
参考
- Abu-Reidah,I。M.(2019)。碳酸饮料。非酒精饮料的趋势。Inc。https://doi.org/10.1016/b978-0-12-816938-4.00001-x
- Coombe, B. G., Dundon, R. J., & Short, A. W. S. (1980). Indices of sugar—acidity as ripeness criteria for winegrapes. Journal of the Science of Food and Agriculture, 31(5), 495–502.https://doi.org/10.1002/jsfa.2740310512
- Teixeira Dos Santos,C.A.,Páscoa,R.N.M.J.,Porto,P.A.L.S.,Cerdeira,A.L.,González-Sáiz,J.M.拉曼光谱进行葡萄酒分析:与近红外光谱法的比较。Talanta,186(4月),306–314。https://doi.org/10.1016/j.talanta.2018.04.075
- TEC5USA(2022)食品和饮料光谱仪,https://www.tec5usa.com/markets/food-feed-beverages/,2022年5月访问
此信息已从Tec5usa Inc.提供的材料中采购,审查和改编。亚博网站下载
For more information on this source, please visitTEC5USA Inc.