使用激发发射矩阵和多重光散射来描述不同pH值的豆奶的光学特性
1Graduate School of Science and Technology, Niigata University, 8050 2-no-cho, Ikarashi, Nishi-ku, Niigata 950-2181, Japan.
概括
光谱法提供了一种非破坏性的方法来测量大豆奶的pH值. 激发发射矩阵 (EEMs) 揭示了与pH相关的特征峰值,从而实现了准确的建模.
科学领域:
- 食品科学与技术 食品科学与技术
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 精确的pH监测对于豆奶的质量和加工至关重要.
- 传统的pH测量方法可能是破坏性的或耗时的.
- 需要探索用于大豆牛奶分析的新型,非破坏性技术.
研究的目的:
- 评估光光谱法用于在豆奶中非破坏性pH值的测定.
- 使用激发发射矩阵 (EEMs) 开发和比较用于pH预测的化学度模型.
主要方法:
- 从110个不同pH值的豆奶样本中收集了EMS.
- 在特定的激发/发射波长时,确定了特征性的光峰值.
- 开发了带有预处理的部分最小平方回归 (PLSR) 和支向量机 (SVM) 模型.
主要成果:
- 两个主要的光峰值 (280/340 nm和365/460 nm) 的强度随着pH值的增加而增加.
- 使用原始EEM数据的SVM模型实现了高精度 (R2cv = 0.972,RMSECV = 0.095).
- 使用日志转换EEM的PLSR模型也显示出良好的性能 (R2cv = 0.951,RMSECV = 0.127).
结论:
- 光光谱学,特别是使用SVM模型,是用于非破坏性大豆奶pH测量的有前途的工具.
- 观察到的光变化与依赖pH的光散射特性相关.
- 这种技术为豆奶生产的质量控制提供了快速而准确的替代方案.
关键词:
激发-发射矩阵是一个激发-发射矩阵.光是一种光效应.接近红外光谱学近红外光谱学蛋白质蛋白质是一种蛋白质.豆乳kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 在这里可以看到更多的图片它们的pH值为pH.相关概念视频
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