The standardisation of near infrared instruments using master selection and Wiener filter methods

In this report, two aspects of near infrared standardisation (calibration transfer) were studied: the selection of the master instrument and the standardisation algorithm. Their impact on the accuracy of barley protein measurements was evaluated using 285 fixed-filter Foss Grainspec instruments. Optical linear regression, Wiener filter and no standardisation were compared. The statistically-based master selection procedure had a significant impact on the spectral and calibration transfer when all standardisation techniques were applied. Spectral centralisation improved the accuracy of prediction, particularly when a poorer master was used.