Register here

Benchtop analyzers for compositional analysis of dairy samples are traditionally based on FT-IR spectrometers. Benchtop FT-IR analyzers have repeatability and accuracy necessary to serve as the reference measurement for samples used to calibrate in-line analyzers. Direct transfer of calibrations from the benchtop FT-IR analyzers is not possible as most in-line analyzers are based on Near-Infrared technology.

Bruker Optics introduced an FT-NIR based benchtop analyzer for measurement of fluid dairy samples nearly 10 years ago. The instruments have been certified by IDF and ISO as having accuracy and reproducibility comparable to the reference methods for compositional analysis of dairy products. Moreover, the FT-NIR benchtop instruments utilize the same spectral range as instruments used for in-line analysis. This begs the question if calibrations developed on a benchtop FT-NIR spectrometer can be transferred to measurements performed using an in-line FT-NIR.

In this presentation, we will explore the advantages and potential challenges of transferring PLS calibrations from a benchtop FT-NIR to inline FT-NIR measurements. WE will discuss the practical limitations due to measurement cell design, sample type, temperature, and flow rate for the in-line system.