Collaborative study concerning the enzymatic determination of starch in food, feed, and raw materials of the starch industry

This paper describes the collaborative study for establishing the repeatability and reproducibility of a recently developed new enzymatic starch determination. The ring test was in accordance to the ISO 5725 requirements for interlaboratory studies. The interlaboratory test resulted in a good relative repeatability of 1-2% and a relative reproducibility of about 3-5% for the tested enzymatic starch determination. The method is now in use as a revision to the Dutch Standard Protocol NEN 3574.