Aqueous Glucose Solution Measurement by Three Types NIR Spectrometer

세 가지 방식의 근적외선 분광분석기를 이용한 글루코오스 수용액의 측정

  • 백주현 (동덕여자대학교 약학대학) ;
  • 강나루 (동덕여자대학교 약학대학) ;
  • 우영아 (동덕여자대학교 약학대학) ;
  • 김효진 (동덕여자대학교 약학대학)
  • Published : 2003.12.01

Abstract

A method is described for measuring clinically relevant levels of glucose in a pH 7.4 phosphate buffer by nearinfrared (NIR) absorption spectroscopy. Three types of NIR spectrometer, dispersive type, photo-diode array (PDA) type, and fourier transform (FT) type spectrometer were used and the performance was compared. Spectra were collected with a cuvette cell or quartz liquid fiber of 1 mm or 2 mm optical pathlength as transmittance method. Glucose absorption band appeared at second overtone, first overtone, and combination region for all systems. By use of the multivariate technigue of partial least squares (PLS) regression, glucose concentrations can be determined with a 16, 44, and 9.1 mg/d l standard error of prediction for dispersive type, photo-diode array type, and fourier transform type system, respectively. Sensitivity of spectrometer was evaluated by absorbance for the difference of 10 mg/d l glucose. Three absorption bands, second overtone, first overtone, and combination region were suited to three types systems, dispersive type, photo-diode array type, and fourier transform type systems, respectively. This investigation showed that three types NIR spectrometer were proper method for identification and quantitative analysis of glucose and possible for noninvasive blood glucose monitoring.

Keywords

References

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