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Liquid-solid sample preparation in drug analysis.

R D McDowall¹, J C Pearce, G S Murkitt

¹Department of Drug Analysis, Smith Kline & French Research Limited, The Frythe, Welwyn, Herts, AL6 9AR, UK.

Journal of Pharmaceutical and Biomedical Analysis

|January 1, 1986

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This study compares liquid-solid extraction (LSE) to liquid-liquid extraction (LLE) for biological sample preparation. LSE offers practical advantages and disadvantages for various assays, detailed in this guide.

Area of Science:

Analytical Chemistry
Biochemistry
Sample Preparation Techniques

Background:

Liquid-liquid extraction (LLE) is a conventional method for biological sample preparation.
There is a need for efficient and effective sample preparation techniques in biological assays.

Purpose of the Study:

To compare liquid-solid extraction (LSE) with liquid-liquid extraction (LLE).
To provide a practical guide to the advantages and disadvantages of LSE for biological sample preparation.

Main Methods:

Review of commercially available manual LSE methods (Sep-Pak, Bond Elut).
Review of automated LSE instruments (Prep, Analytichem Automated Sample Processor - AASP).
Analysis of literature examples and authors' experiences with LSE.

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Main Results:

LSE methods are evaluated for their applicability in biological sample preparation.
Specific advantages and disadvantages of LSE are identified based on practical application.
Comparison highlights the utility of LSE in various assay contexts.

Conclusions:

Liquid-solid extraction (LSE) presents a viable alternative to traditional liquid-liquid extraction (LLE).
The choice between LSE and LLE depends on specific assay requirements and available instrumentation.
This guide aids researchers in selecting the optimal extraction method for biological samples.