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相关概念视频

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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High-Performance Liquid Chromatography: Introduction01:11

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
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Thin-Layer Chromatography (TLC): Overview01:11

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Thin-layer chromatography (TLC) is a chromatography technique that separates compounds based on their polarity. TLC typically uses polar silica gel, a form of silicon dioxide, as the stationary phase. The silica gel contains hydroxyl (OH) groups on its surface, which form hydrogen bonds with polar compounds, influencing their adhesion to the stationary phase.
To begin the analysis, a mixture of compounds is spotted on the starting line on the TLC plate using a thin capillary. The bottom of the...
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Chromatography: Introduction01:10

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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
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Distillation: Vapor–Liquid Equilibria01:01

Distillation: Vapor–Liquid Equilibria

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Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
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Determining Four Components in a Lipid Nanoparticle RNA Delivery System by Liquid Chromatography Combined with Evaporative Light Scattering Detector
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非线性液体-液体色谱:模拟二元混合物分离的模型.

Melanie Gerigk1, Fabian Börner1, Simon Vlad Luca1

  • 1Biothermodynamics, TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany.

Journal of chromatography. A
|September 18, 2023
PubMed
概括
此摘要是机器生成的。

这项研究提出了一种简单的方法,可以准确地建模非线性液体-液体色谱 (LLC) 分离,这对于优化大麻素 (CBD和CBG) 净化至关重要. 该方法使用实验数据来预测混合物行为,改善复杂分离的工艺设计.

关键词:
大麻二醇 (Cannabidiol) 是一种加拿大大麻的作用离心分区色谱学 离心分区色谱学逆流色谱学是一种反流色谱学.分割平衡是如何实现的

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科学领域:

  • 化学工程是化学工程的重要组成部分.
  • 分离科学 分离科学
  • 染色体学 染色体学 是一种染色学.

背景情况:

  • 液体-液体色谱 (LLC) 分离通常在假设度独立的溶液分布的情况下进行建模.
  • 非线性分布平衡,其中溶液分布取决于度,对准确的LLC建模和工艺设计构成挑战.
  • 实验性确定多组分液体-液体平衡是耗时的,热力学预测往往是不准确的.

研究的目的:

  • 开发和验证一种简单,准确的方法来建模和模拟非线性 (依赖度) 的LLC分离.
  • 在特定的溶剂系统中估计大麻 (CBD) 和大麻基醇 (CBG) 的分布平衡参数.
  • 使用开发的模型预测二元化CBD/CBG混合物的化概况.

主要方法:

  • 利用反向方法从单溶液脉冲注入实验中估计分布平衡方程参数.
  • 覆盖的度范围为CBD的1-100毫克/毫升和CBG的1-50毫克/毫升.
  • 通过使用n-hexane/methanol/water (10/7.5/2.5 v/v/v) 预测二元CBD/CBG混合物在40 mg/mL总大麻素度的化概况来验证该模型.

主要成果:

  • 成功估计了CBD和CBG的度依赖分布平衡参数.
  • 证明了对二元CBD/CBG混合物的化概况的准确预测.
  • 为特定的双相溶剂系统验证了拟议的建模方法.

结论:

  • 提出的简单方法有效地建模和模拟非线性LLC分离.
  • 该方法为大麻素混合物提供了准确的预测,有助于过程设计.
  • 适用性取决于系统,需要对每个分离任务进行个别评估.