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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 59, Iss. 2 — Feb. 1, 2005
  • pp: 181–189

Noninvasive Alcohol Testing Using Diffuse Reflectance Near-Infrared Spectroscopy

T.D. Ridder, S.P. Hendee, and C.D. Brown

Applied Spectroscopy, Vol. 59, Issue 2, pp. 181-189 (2005)


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Abstract

A diffuse reflectance near-infrared (NIR) spectrometer was evaluated as a noninvasive alternative to breath and blood measurements for<i> in vivo</i> alcohol testing. A hybrid partial least squares (PLS) calibration was constructed using a combination of<i> in vivo</i> and<i> in vitro</i> spectral data. This model was subsequently evaluated for its performance in quantifying alcohol concentrations<i> in vivo</i> using a prospective validation study involving subjects who did not participate in the calibration. The validation study entailed induction of alcohol excursions in ten human subjects and comparison of the noninvasive NIR alcohol measurements to blood and breath alcohol measurements. Blood and breath alcohol measurements were performed at the time of each noninvasive NIR measurement (<i>N</i> = 372), establishing the noninvasive NIR measurement standard error relative to blood alcohol at 4.9 mg/dL (0.0049%). Assessment of the hybrid calibration model's sensitivity and selectivity provided strong evidence that the hybrid calibration yielded measurements that were both sensitive to alcohol and independent of other absorbing analytes in human tissue.

Citation
T.D. Ridder, S.P. Hendee, and C.D. Brown, "Noninvasive Alcohol Testing Using Diffuse Reflectance Near-Infrared Spectroscopy," Appl. Spectrosc. 59, 181-189 (2005)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-59-2-181


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