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Related Concept Videos

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...

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Multi-step Preparation Technique to Recover Multiple Metabolite Compound Classes for In-depth and Informative Metabolomic Analysis
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Published on: July 11, 2014

Recent advances in sample preparation techniques for effective bioanalytical methods.

Prashant Laxman Kole1, Gantala Venkatesh, Jignesh Kotecha

  • 1School of Pharmacy, Queens University Belfast, UK.

Biomedical Chromatography : BMC
|December 15, 2010
PubMed
Summary

This review highlights advanced bioanalysis sample preparation techniques, moving beyond conventional liquid-liquid extraction (LLE) and protein precipitation (PP). Novel solid-phase extraction (SPE) methods offer enhanced selectivity and sensitivity for modern bioanalytical applications.

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Pharmacology

Background:

  • Conventional bioanalysis sample preparation methods like liquid-liquid extraction (LLE) and protein precipitation (PP) are increasingly outdated.
  • The last decade has seen significant advancements in novel sample preparation techniques for bioanalysis.

Purpose of the Study:

  • To review recent developments in bioanalysis sample preparation techniques.
  • To provide an update on the principles, theory, applications, and automation possibilities of these techniques.
  • To comparatively discuss the advantages and limitations of various methods.

Main Methods:

  • Review of literature on emerging bioanalytical sample preparation techniques.
  • Focus on advancements in solid-phase extraction (SPE), including hybrid SPE and molecularly imprinted polymer SPE.
  • Discussion of solid-phase micro-extraction (SPME) and its variations like stir bar sorptive extraction (SBSE).
  • Exploration of techniques such as dispersive SPE, disposable pipette extraction (DPX), and micro-extraction by packed sorbent (MEPS).
  • Coverage of on-line SPE with column-switching and newer protein precipitation (PP) methods.
  • Inclusion of updated liquid-liquid extraction (LLE) approaches like salting-out LLE.

Main Results:

  • Novel SPE techniques offer improved selectivity and sensitivity.
  • Dispersive SPE, DPX, and MEPS provide diverse extraction phases and unique benefits.
  • On-line SPE with column-switching is gaining traction in bioanalysis.
  • Advanced PP techniques effectively remove interfering substances like phospholipids and proteins from plasma/serum.
  • Newer LLE methods present alternative extraction strategies.

Conclusions:

  • Modern bioanalysis relies on advanced sample preparation techniques beyond traditional LLE, PP, and SPE.
  • Emerging SPE and micro-extraction methods provide greater selectivity, sensitivity, and efficiency.
  • Automation and on-line capabilities are key trends in bioanalytical sample preparation.