Calibration transfer for analytical instruments

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2502521, 73 1R, 364498, G01N 2101

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active

054596777

ABSTRACT:
A technique for transferring a multivariant calibration model from a reference analytical instrument to a target analytical instrument that may be a different instrument, or the same instrument at a later time. In a "direct" approach, a plurality of transfer samples are selected, and a plurality of measurements are made for each transfer sample using the reference instrument, producing a reference instrument response for each sample. These measurements are repeated for the target instrument, to produce a target instrument response for each transfer sample. One then generates transfer coefficients capable of performing a multivariate estimation of the reference instrument responses for the transfer samples from the target instrument responses for those samples. The transfer coefficients may then be used to convert a target instrument response for an unknown sample into the equivalent response for the reference instrument. In an important "piecewise" variation, the transfer coefficients comprise a plurality of estimation coefficients for estimating each reference data value from more-than-one but less-than-all target data values. "Classical" and "inverse" transfer techniques are also described, wherein target instrument responses for the transfer samples are combined with reference instrument responses for the full set of calibration samples, to derive a multivariate prediction model for the target instrument.

REFERENCES:
patent: 3975727 (1976-08-01), Mader et al.
patent: 4587624 (1986-05-01), Banno
patent: 4660151 (1987-04-01), Chipman et al.
patent: 4864842 (1989-09-01), Regimand
patent: 4866644 (1989-09-01), Shenk et al.
patent: 4916645 (1990-04-01), Wuest et al.
patent: 5016203 (1991-05-01), Komatsu et al.
Camo Inc., "Computer-Aided Engineering Software for Multivariate Analysis, Calibration and Prediction Introduced by Camo, Inc.," News Release, Dec. 19, 1988, 2 pages.
Guided Wave, Inc., News Release about a software package for use with spectrophotometers, Nov. 21, 1988, 1 page.
D. Honigs, "Near Infrared Analysis," Analytical Instrumentation, vol. 14, No. 1, 1985, pp. 1-48.
J. Kelly, C. Barlow, T. Jinguji & J. Callis, "Predication of Gasoline Octane Numbers from Near-Infrared Spectral Features in the Range 660-1215 nm," Analytical Chemistry, No. 61, pp. 313-320.
A. Lorber & B. Kowalski, "A Note on the Use of the Partial Least-Squares Method for Multivariate Calibration," Applied Spectroscopy, vol. 42, No. 8, 1988, pp. 1572-1574.
LT Industries, Inc., News Release, "LT Industries Unveils Powerful Software for NIR Analysis," Dec. 11, 1989, 2 pages.
LT Industries, Inc., News Release, "High-Speed NIR Analyzer for Non-Destructive, On-Line, Multi-Constituent Monitoring to be Featured at Pittcon," Feb. 12, 1990, 3 pages.
H. Mark & J. Workman, Jr., "A New Approach to Generating Transferable Calibrations for Quantitative Near-Infrared Spectroscopy," Spectroscopy, vol. 3, No. 11, pp. 28-36.
T. Naes, "Comparison of Approaches to Multivariate Linear Calibration," Biomedical Journal, vol. 27, No. 3, 1985, pp. 265-275.
T. Naes, "Multivariate Calibration Using Covariance Adjustment," Biomedical Journal, vol. 28, No. 1, pp. 99-107.
B. Osborne, "Calibration of Instruments for Near-Infrared Spectroscopy," Spectroscopy, vol. 4, No. 4, pp. 48-55.
B. Osborne & T. Fearn, "Collaborative evaluation of universal calibrations for the measurement of protein and moisture in flour by near infrared reflectance," Blackwell Scientific Publications, 1983, 5 pages.
E. Sanchez & B. Kowalski, "Tensorial Calibration: I. First-Order Calibration," Journal of Chemometrics, vol. 2, 1988, pp. 247-263.
J. Shenk, M. Westerhaus & W. Templeton, Jr., "Calibration Transfer Between Near Infrared Reflectance Spectrophotometers," Crop Science, vol. 25, Jan.-Feb. 1985, pp. 159-161.

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