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Measurement of Glucose and Protein in Urine Using Absorption Spectroscopy Under the Influence of Other Substances

타 성분 영향을 고려한 요당과 요단백의 흡수분광학 진단

  • Yoon, Gil-Won (Department of Electronics & Information Engineering, Seoul National University of Technology) ;
  • Kim, Hye-Jeong (Institute for Biomedical Electronics, Seoul National University of Technology)
  • 윤길원 (서울산업대학교 전자정보공학과) ;
  • 김혜정 (서울산업대학교 의료전자연구소)
  • Published : 2009.12.25

Abstract

Glucose and protein in urine are among the important substances for urine analysis and have generally been measured based on a reagent strip test. In this study, these two substances were measured using mid-infrared absorption spectroscopy. Samples were prepared from a commercial synthetic urine product. Glucose and albumin were added as well as red blood cells, which are expected to create the most spectroscopic interference of any substance. Concentrations of these substances were varied independently. Optimal wavelength regions were determined from a partial least squares regression analysis (glucose 980 - 1150/cm, albumin 1400 - 1570/cm). Interference by other substances increased the differences between measured and predicted values. Albumin measurement in particular weres heavily influenced by the presence of glucose and red blood cells. Depending on the inference by other substances, measurement errors were 29.85${\sim}$45.19 mg/dl for a glucose level between 0 and 1000 mg/dl and 14.0${\sim}$93.11 mg/dl for an albumin level of 0 ${\sim}$ 500 mg/dl. Our study proposes an alternative to the chemical test-strip analysis, which shows only discrete concentration levels.

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