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Automated solid-phase extraction and liquid chromatographic method for retinoid determination in biological samples
Ralph Rühl1, Florian J Schweigert
1Institute of Nutritional Science, University of Potsdam, Arthur Scheunert-Allee 114-116, D-14558 Potsdam-Rehbrücke, Germany. ralphruehl@web.de
Summary
A new automated method simplifies retinoid analysis in plasma and tissues. This solid-phase extraction technique enhances the study of retinoids in biological samples.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Pharmacology
Background:
- Retinoids play crucial roles in various biological processes.
- Accurate quantification of retinoids in biological matrices is essential for research.
- Existing methods for retinoid analysis can be labor-intensive and time-consuming.
Purpose of the Study:
- To develop and validate a partly automated sample preparation and fully automated solid-phase extraction method for retinoids.
- To enable efficient and reliable quantification of multiple retinoids in plasma, kidney, and liver samples.
- To facilitate the study of endogenous retinoids and those from supplements or drugs.
Main Methods:
- Automated mixing and solid-phase extraction (C2 cartridges) of plasma, kidney, and liver homogenates.
- Automated cartridge cleaning, preconditioning, and loading for direct HPLC analysis.
- Fully automated HPLC separation and quantification of various retinoids in a single run.
Main Results:
- High recovery rates for retinoids (80-90%).
- Excellent intra-day repeatability (< 11.7%).
- Quantification limit as low as 1.2 ng/ml in standard samples.
Conclusions:
- The established method offers a highly automated and selective approach for retinoid analysis.
- This technique is suitable for studying retinoids in various biological samples.
- It supports research on retinoids in nutritional supplementation and pharmacological applications.