在平面色谱介质上使用蒸汽相沉积西兰的连续静止相梯度的制备
Md Abdullah Al Macktuf1, Sarah C Rutan1, Judith Bautista2
1Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA.
Journal of chromatography. A
|July 2, 2024
概括
一种新的蒸汽相沉积 (VPD) 方法在TLC板上创建连续静止相梯度 (cSPG),以提高分离. 这种具有成本效益的技术可以提高芳香化合物的色谱分辨率.
科学领域:
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
- 材料科学 材料科学 材料科学
背景情况:
- 传统的薄层染色学 (TLC) 静止相具有有限的分离能力.
- 发展渐变静止相对于提高色谱分辨率和选择性至关重要.
研究的目的:
- 引入一种新的,多功能和简单的蒸汽相沉积 (VPD) 方法,用于在TLC板上创建连续静止相梯度 (cSPGs).
- 为了描述准备的梯度TLC板,并评估它们的染色学性能.
主要方法:
- 甲基化 (PDCS) 被用作VPD系统中的前体,以渐变的方式使酸盐TLC板功能化.
- 描述涉及紫外线可视化和扩散反射光谱 (DRS) 来评估梯度的存在和形状.
- 用三种芳香化合物的混合物来评估色谱性能,将梯度板与未经修改和均修改的板进行比较.
主要成果:
- 在TLC板上,VPD成功地创建了连续的基功能化梯度.
- 扩散反射谱学证实,梯度形状和修改程度取决于锡兰度,VPD时间和湿度.
- 与均或未经修改的板相比,梯度TLC板,特别是那些含含量高的板,对芳香化合物的分离和分辨率显著提高.
结论:
- 蒸汽相沉积 (VPD) 提供了一种新的,具有成本效益的方法,用于在TLC板上制备梯度静止相.
- 该技术增强了色谱分离能力,为复杂的混合物提供了更好的分辨率和选择性.
- 开发的梯度TLC板块具有推进分析分离技术的潜力.
相关概念视频
01:17Gas Chromatography: Types of Columns and Stationary Phases
571
Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
571
01:11High-Performance Liquid Chromatography: Introduction
2.0K
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:
In HPLC, two phases play a critical role in the separation process:
2.0K
01:10Silica Gel Column Chromatography: Overview
1.1K
Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
1.1K
01:13Gas Chromatography: Introduction
1.9K
Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
1.9K
01:10Chromatography: Introduction
4.3K
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...
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...
4.3K
01:09Analyte Adsorption and Distribution
634
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
634