Comparison of the performance of a microwave based and an NMR based biomaterial moisture measurement instruments




This article compares the performance of an NMR-based and a microwave based moisture measurement instruments designed for biomaterials. The conventional moisture measurement method, Loss-on-Drying (LoD) serves as a reference measurement for both instruments. Six different biomaterials at three moisture content levels were measured with the microwave instrument and five biomaterials with the NMR instrument. After instrument calibrations, the difference and variation of the measurement results for parallel samples and the repeatability of the NMR and microwave instruments were estimated. Reasonable agreement between the measurement methods was achieved.

Author Biographies

Petri Juhani Österberg, University of Oulu, Finland and Kajaani Univeristy of Applied Sciences

University of Oulu: Visiting Researcher at the unit of Measurement technology, D.Sc. (Tech.)

Kajaani University of Applied Sciences: Technology advisor D.Sc. (Tech.)

Martti Heinonen, VTT MIKES Espoo

Research Manager, D.Sc. (Tech)

Maija Johanna Ojanen-Saloranta, VTT MIKES Espoo

Research Team Leader, D.Sc.(Tech.)

Anssi Jaakko Mäkynen, Professor, D.Sc.(Tech.)

University of Oulu, unit of measurement technology






Research Papers