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Types Of Column Chromatography01:29

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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.
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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.
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Gas Chromatography: Types of Columns and Stationary Phases01:17

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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.
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Principles Of Column Chromatography01:13

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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...
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A rapid reversed-phase liquid chromatography method for the determination of individual monoclonal antibody content in a co-formulated drug product.

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Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach
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Implementing 1.5 mm internal diameter columns into analytical workflows.

Benjamin P Libert1, Justin M Godinho2, Samuel W Foster3

  • 1Advanced Materials Technology, Inc., 3521 Silverside Road, Wilmington, DE 19810, USA; Department of Chemistry & Biochemistry, Rowan University, 201 Mullica Hill Rd., Glassboro, NJ 08028, USA.

Journal of Chromatography. A
|June 22, 2022
PubMed
Summary
This summary is machine-generated.

1.5 mm internal diameter (i.d.) liquid chromatography (LC) columns offer improved sensitivity and signal for small molecules and antibodies. This intermediate column dimension enhances analytical performance without requiring specialized equipment, bridging the gap between standard and capillary LC formats.

Keywords:
Monoclonal antibody analysisMulti-attribute monitoringNarrow-bore columnsSuperficially porous particlesUHPLC-MS

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Area of Science:

  • Analytical Chemistry
  • Chromatography

Background:

  • Smaller column diameters in liquid chromatography (LC) offer analytical benefits but face challenges like fragility and extra-column dispersion.
  • Capillary LC is difficult to use routinely, while larger columns have performance limitations.

Purpose of the Study:

  • To evaluate 1.5 mm i.d. LC columns as an intermediate dimension between standard 2.1 mm and capillary columns.
  • To assess the performance of 1.5 mm i.d. columns for small molecule and monoclonal antibody analysis.

Main Methods:

  • Application of 1.5 mm i.d. columns to liquid chromatography with UV detection (LC/UV) for small molecules.
  • Utilized 1.5 mm i.d. columns in LC coupled with mass spectrometry (LC/MS) for monoclonal antibody analysis at various levels (intact, subunit, peptide).

Main Results:

  • 1.5 mm i.d. columns provided a two-to-threefold improvement in analyte peak area signal for small molecules and antibody analysis with equivalent mass load.
  • Increased peak height was observed with 1.5 mm i.d. columns, with variations noted between isocratic and gradient modes.
  • These columns balance increased sensitivity with mitigated efficiency losses from extra-column dispersion compared to 1.0 mm i.d. columns.

Conclusions:

  • 1.5 mm i.d. LC columns represent a practical intermediate format, enhancing sensitivity and signal without specialized equipment.
  • They offer a significant performance increase over 2.1 mm columns while avoiding the dispersion issues of smaller capillary columns.
  • This format provides a valuable alternative for routine analysis requiring improved sensitivity and robustness.