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Titration in Nonaqueous Solvents01:16

Titration in Nonaqueous Solvents

765
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
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High-Performance Liquid Chromatography: Elution Process01:05

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
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Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
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结合高通量实验和主动学习来表征深层环氧溶剂.

Dinis O Abranches1, William Dean2, Miguel Muñoz2

  • 1Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States.

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概括
此摘要是机器生成的。

使用高斯过程进行主动学习,加速了深度性溶剂 (DES) 的表征. 这种方法显著减少了准确预测DES粘度所需的实验数据,使得DES应用程序的开发速度更快.

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科学领域:

  • 物理化学 物理化学
  • 材料科学 材料科学 材料科学
  • 计算化学的计算化学

背景情况:

  • 深度环氧化溶剂 (DES) 通过前体和成分变化提供高可调性.
  • 在广泛的范围内对DES的物理化学性质进行表征是实验密集的,并且阻碍了应用开发.
  • 通过添加溶剂来降低粘度对于大规模的DES应用至关重要.

研究的目的:

  • 开发使用高斯过程 (GPs) 的积极学习 (AL) 方法,以最大限度地减少 DES 描述中的实验性工作.
  • 探索降低DES粘度作为AL应用的案例研究.
  • 使用全科医生准确预测DES粘度,并减少数据要求.

主要方法:

  • 对九个三元DES的高通量实验选.
  • 训练高斯过程 (GPs) 以基于成分和温度来预测DES粘度.
  • 在AL框架内利用GP的不确定性估计来指导数据采集.

主要成果:

  • 一般医生准确地预测了复杂的DES混合物的粘度.
  • AL框架显著减少了所需的实验数据点的数量.
  • 对于许多系统,只需五个独立数据点就能实现准确的粘度模型.

结论:

  • 基于全科医生的AL方法有效地将DES表征的实验力度降到最低.
  • 这种方法加速了基于DES的应用程序的设计和可扩展性.
  • 该研究表明,对准确的物理化学性质预测的数据要求显著减少.