title: Youden analysis of Karl Fischer titration data from an interlaboratory study determining water in animal feed, grain, and forage.
abstract: Data from a recent interlaboratory study of the determination of water (moisture) in animal feed, grain, and forage (plant tissue) by Karl Fischer titration were re-analyzed using Youden plots. The purpose was to show the unique ability these plots possess of separating random and systematic errors visually while providing numerical estimates of the precision and the systematic error of the method. Furthermore, the usefulness of the technique is underscored because AOAC INTERNATIONAL allows the use of matched pairs in collaborative studies to obtain estimates of repeatability and reproducibility.
authors.affiliation: frank_e_jones@yahoo.com
authors.forename: Frank E
authors.initials: FE
authors.lastname: Jones
mesh_terms: D000821:Animal Feed; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D003627:Data Interpretation, Statistical; D002523:Edible Grain / Q000378:metabolism*; D005504:Food Analysis / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity