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Applied Spectroscopy

Applied Spectroscopy


  • Vol. 52, Iss. 4 — Apr. 1, 1998
  • pp: 599–603

Hybrid Calibration Models An Alternative to Calibration Transfer

Durmus Ozdemir, Matt Mosley, and Ron Williams

Applied Spectroscopy, Vol. 52, Issue 4, pp. 599-603 (1998)

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A new procedure for calibrating multiple instruments is presented in which spectra from each are used simultaneously during the construction of multivariate calibration models. The application of partial least-squares (PLS) and genetic regression (GR) to the problem of generating these hybrid calibrations is presented. Spectra of ternary mixtures of methylene chloride, ethyl acetate, and methanol were collected on a dispersive and a Fourier transform spectrometer. Calibration models were generated by using differing numbers of spectra from each instrument simultaneously in the calibration and prediction sets, and then validated by using a set of spectra from each instrument separately. Calibration models were found that perform well on both instruments, even when only a single spectrum from the second instrument was used during the calibration process. As a benchmark, comparison with PLS showed that GR is more effective than PLS in building these hybrid calibration models.

Durmus Ozdemir, Matt Mosley, and Ron Williams, "Hybrid Calibration Models An Alternative to Calibration Transfer," Appl. Spectrosc. 52, 599-603 (1998)

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