부산대학교 도서관

We have been developing an optical system for monitoring urinary substances In this study, we carried out preliminary experiments for estimating concentration of urea, sodium chloride, creatinine and glucose using an FT-IR spectrometer. Two kinds of samples were pepared. One was the urine collected from healthy adults mixed with appropriate amount of glucose, and the other was the urine obtained from a male adult suspicious of having diabetes. Absorbance were measured with the wavelength range of 750-2500nm, and the PLS regression analysis was performed. From the results obtained, it was confirmed that, we could estimate concentration of these four substances in the "glucose added samples" with reasonable accuracy, however, deteriorations of accuracy were observed in the samples from the diabetes suspicious subject. To improve the accuracy, we intend to check several matters, i.e., interference substances, wavelength selection, etc.