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Related Concept Videos

High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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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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Sample Preparation for Analysis: Overview01:21

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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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Supercritical Fluid Chromatography01:18

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
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High-Performance Liquid Chromatography: Instrumentation00:57

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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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Sulfated Phenolic Substances: Preparation and Optimized HPLC Analysis.

Lucie Petrásková1, Kristýna Káňová1,2, Katerina Brodsky1,2

  • 1Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic.

International Journal of Molecular Sciences
|May 28, 2022
PubMed
Summary

This study developed an optimized high-performance liquid chromatography (HPLC) method for analyzing sulfated phenolic compounds. The robust method effectively separates various phenolic sulfates, crucial for understanding drug metabolism and pro-drug development.

Keywords:
Desulfitobacterium hafnienseHPLC analysisaryl sulfotransferaseflavonoidsphenolic acidpolyphenolssulfates

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Pharmacology

Background:

  • Sulfated phenolic compounds are vital as mammalian phase II metabolites and pro-drugs.
  • Chemoenzymatic methods using aryl sulfotransferases are key for preparing these standards.

Purpose of the Study:

  • To create a comprehensive library of sulfated phenols, phenolic acids, flavonoids, and flavonolignans.
  • To optimize high-performance liquid chromatography (HPLC) analysis for these compounds.

Main Methods:

  • Synthesis and characterization of four new phenolic sulfates using mass spectrometry (MS) and nuclear magnetic resonance (NMR).
  • Investigation of HPLC separation for 38 phenolic and sulfated phenolic standards.
  • Comparison of various stationary and mobile phases, focusing on pH and buffer effects.

Main Results:

  • Developed a robust HPLC method with photodiode-array (PDA) detection for separating complex mixtures of sulfated phenolics.
  • Demonstrated method suitability for enzymatic sulfation reaction products.
  • Confirmed applicability for mass spectrometry (MS) detection due to low flow rate and buffer choice.

Conclusions:

  • The optimized HPLC method provides effective separation of diverse sulfated phenolic compounds.
  • This method is valuable for analyzing metabolites and pro-drugs in pharmaceutical research.
  • The method's compatibility with MS detection enhances its utility in drug discovery.