Figure 4.

(a) Water extractives and (b) glucan content of 154 samples in the round robin study, generated by seven analysts working in two different laboratories. In both plots the data are separated by laboratory, with Tukey outliers highlighted. All sample results with water extractives data flagged as Tukey outliers (n = 17) were from the same solvent extraction instrument in laboratory B and were excluded from the data analysis. A total of 12 carbohydrate outliers were also identified, but 5 of these were flagged as extractives outliers as well. All but 1 of the remaining 7 outliers were analyzed in laboratory A.