制备高效的HILIC毛细管柱,使用2100bar的泥包装
Brady G Anderson1, Tate A Hancock1, Robert T Kennedy2
1Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, United States.
Journal of chromatography. A
|April 5, 2024
概括
研究人员通过优化泥包装方法开发了高效水友互动液体色谱 (HILIC) 列. 这些长的HILIC列,装满了亚-2微米颗粒,显示出复杂混合物分析的希望.
科学领域:
- 分析化学 分析化学
- 染色学科学 染色学科学
背景情况:
- 反相液态色谱 (RPLC) 主导着复杂混合物分析.
- 水友互动液态色谱 (HILIC) 对于分离极性化合物至关重要,它补充了RPLC.
- 高效染色学需要小颗粒和长列,但HILIC列长于25厘米,装有2微米以下的颗粒未得到充分探索.
研究的目的:
- 为了研究75厘米长的HILIC柱的泥包装,使用1.7微米的桥式乙烯混合胺颗粒.
- 为了确定包装这些长,高效的HILIC柱子的最佳泥溶剂和度.
- 在理论板和降低最小板高度方面评估准备好的HILIC柱的性能.
主要方法:
- 75厘米HILIC柱的泥包装,在2,100bar时有1.7微米颗粒.
- 测试乙二,甲醇,乙和水作为泥溶剂.
- 评估泥的度从50-200毫克/毫升和包装时间.
主要成果:
- 乙二被确定为包装HILIC柱子的最佳泥溶剂.
- 用150毫克/毫升的泥在酸中的包装产生了最短的包装时间 (9分钟) 和可比的柱子性能.
- 准备好的柱子实现了3.3的最小板高 (hmin) 的降低和12万个理论板块的acenaphthene.
- 帕拉托卢硫酸导致最低的hmin (1.9) 和最高的效率 (21万盘).
结论:
- 优化的泥包装条件可以生产高效,长的HILIC柱子,颗粒小于2μm.
- 这些发现为开发用于复杂混合物分析的先进HILIC列提供了途径.
- 开发的方法为在各种分析应用中改善极性化合物的分离提供了潜力.
相关概念视频
High-Performance Liquid Chromatography: Elution Process
473
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...
473
High-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
High-Performance Liquid Chromatography: Instrumentation
1.9K
High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
1.9K
Gas Chromatography: Types of Columns and Stationary Phases
625
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...
625
Principles Of Column Chromatography
6.8K
The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
6.8K
Types Of Column Chromatography
11.1K
The stability and compatibility of column material with samples are crucial for efficient purification in chromatographic techniques. Various operating parameters such as pH, temperature, or solvent affect the packing of the column material, thereby determining the purification efficiency. The choice of column material also plays an essential role in deciding the operating parameters and can be modified based on the proteins that need to be purified.
Gel Filtration Chromatography
When the...
Gel Filtration Chromatography
When the...
11.1K


