Abstract
This paper reports the results of a study to determine whether mid-infrared (IR) spectroscopy might form the basis for quantitation of glucose and urea levels in whole blood. Spectra were acquired by first diluting whole blood specimens with a dilute potassium thiocyanate solution, drying small aliquots to dry films on BaF 2 substrates and acquiring transmission spectra for the dry films. Reference analyses for urea and glucose were carried out, and partial least-squares calibrations developed using two-thirds of the 200 total specimens for calibration and the remaining one-third to validate the analytical methods. A potassium thiocyanate absorption at 2060 cm −1 provided the means to normalize the spectra, factoring out any minor variations in film thickness.
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