6. AOACSPIFANMethods-2018Awards

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514 F eng et al .: J ournal of AOAC I nternational V ol . 100, N o . 2, 2017

Figure 1. E-grams of pure water blank (gray line) and placebo (processed; black line). Compared with the reagent blank (gray line), there was no significant interference from nonprotein components in the protein range.

Figure 2. E-gram of the five major whey protein standards mixed (group 1): α-Lac, β-Lg, bovine immunoglobulin G [IgG light (L) and heavy (H) chains], BSA, and LF. All standards were from Sigma.

Figure 3. E-gram of the five major whey protein components standards mixed (group 2): α-Lac, β-Lg, CGMP, immunoglobulin G [IgG light (L) and heavy (H) chains], and BSA. All standards were from Sigma, except for CGMP, which was from Arla Ingredients, Inc.

Figure 4. E-gram of the casein protein standard from Sigma.