Figure 8.

K-Matrices for composite training sets constrained to two principal components. Composite training sets containing one (a), two (b), three (c), and four (d) cyclic voltammogram standards per analyte (dopamine and pH) from each individual training set (A–E) were constructed. Instead of determining the rank of each training set with Malinowski's F-test, the number of principal components for each composite training set was constrained to two. The average (solid line) and 95% confidence limits (dotted line) for both DA and pH K-matrices (N = 10,000) are displayed for each training set size. The shape of the average K-matrices for dopamine and pH were independent of training set size (Pearson's correlation, 0.999 ≤ r ≤ 1.000 for DA, 0.999 ≤ r ≤ 1.000 for pH).