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Solid-phase extraction in clinical biochemistry.

Valerie Walker1, Graham A Mills

  • 1Department of Chemical Pathology (NHS), General Hospital, Southampton SO16 6YD, UK. valerie.walker@suht.swest.nhs.uk

Annals of Clinical Biochemistry
|September 14, 2002
PubMed
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Solid-phase extraction (SPE) offers advanced methods for concentrating analytes in biological samples. Innovations in SPE materials and formats enhance analytical capabilities for clinical chemistry and toxicology.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Clinical Chemistry

Background:

  • Measuring low analyte concentrations in plasma and urine requires effective extraction and concentration techniques.
  • Solid-phase extraction (SPE) utilizes analyte partitioning between solid and liquid/vapor phases for sample preparation.

Purpose of the Study:

  • To review the fundamental principles and recent innovations in solid-phase extraction (SPE).
  • To highlight the expanding applications of SPE technologies in clinical toxicology and chemistry.

Main Methods:

  • Discussion of various SPE sorbent materials including reversed-phase, ion-exchange, immunoaffinity, and molecularly imprinted polymers.
  • Overview of solid-phase microextraction (SPME) for volatile and semi-volatile compounds.
  • Exploration of evolving SPE sampling formats from syringes to automated plates.

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Main Results:

  • A wide array of high-quality SPE materials and separation modes are available for diverse applications.
  • Advancements in SPE formats facilitate automated sample processing, both off- and on-line.
  • SPE innovations are increasingly applied in clinical toxicology and show potential for broader clinical chemistry use.

Conclusions:

  • Solid-phase extraction is a rapidly advancing technological field with significant implications for bioanalysis.
  • SPE offers valuable tools for analyzing metabolites, peptides, radioactive elements, and trace metals in clinical settings.