In March 2023, FOSS submitted the recently launched Kjeltec™ 9 for a ring test organized by accredited proficiency testing provider, FAPAS in the UK. The ring test was based on one wheat flour sample that was subdivided and sent to all participants.
More than 50 laboratories, including FOSS, participated in the ring test and each participant had 6 weeks to analyze and report their individual analytical results. The results were collected by FAPAS, in a common report in which all the participants were anonymized. Each individual laboratory was provided with their own results in comparison to the results of all the participating laboratories.
The received sample material was subdivided into 15 g. samples in hermetically sealed foil bags. A protein (nitrogen) determination test was run through the Digestor 2520 and Kjeltec 9 analyser and the results were reported to FAPAS.
In a final report from FAPAS, the results from each laboratory were compared to define an Assigned Value (median/average). The individual results from each lab were defined in terms of deviation from the Assigned Value in which each lab was given a Z-Score, indicating the number of standard deviations from the Assigned Value.
In this ring test, the Kjeltec 9 achieved a Z-Score of 0.0, indicating that the protein (nitrogen) measurement hits the Assigned Value spot on.