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J Lab Clin Med. 2000 Feb;135(2):210-5.

Glucose and lactate concentration determination on single microsamples by Fourier-transform infrared spectroscopy.

Author information

1
INSERM U 443, Equipe de Chimie Bio-Organique, Université Victor Segalen Bordeaux 2, France.

Abstract

This study is the first to assess the analytic potential of Fourier-transform infrared (FT-IR) spectroscopy in determining exercise-induced metabolic changes, such as glucose and lactate serum concentrations, with single 50 microL blood microsamples. One-hundred ninety-eight capillary blood samples were taken at rest (rest serum) and after rowing exercises at different intensities (exercise serum) to obtain a wide range of lactate concentrations. A quantitative method is described with FT-IR spectroscopy involving only dilution and dessiccation of serum samples. Within serum spectra, an absorption band was strongly specific of glucose (1033 cm(-1)) that allowed the determination of its concentration (r = 0.97; P < .001 with reference values). Once we had substrated measured glucose absorption in serum spectra, one other absorption band seemed to be specific for lactate (1127 cm(-1)), which allowed the determination of the concentration of this metabolite (r = 0.96; P < .001 with reference values). The convenience of a capillary blood sampling with the strong accuracy of FT-IR measurements is of particular interest for medicinal and biologic concerns.

PMID:
10695667
DOI:
10.1067/mlc.2000.104460
[Indexed for MEDLINE]

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