Figure 2

Linearity was observed by all laboratories for uBPA and BPA-G in spiked serum samples. A) Linear relationships were examined for uBPA in Phase 2 samples (spiked over the range of 0.5 to 19.5 ng/ml) by all four laboratories. D) Linearity analyses were limited to only the three samples spiked with the lowest concentrations of uBPA (0.5 to 3.1 ng/ml). All laboratories were still able to distinguish low, moderate and high concentrations of uBPA. C) Linear relationships were also examined for BPA-G in all Phase 2 samples (spiked over the range of 0.5 to 19.5 ng/ml) by all four laboratories. B) Linearity analyses were limited to only the three samples spiked with the lowest concentrations of BPA-G (0.5 to 3.1 ng/ml). All laboratories were still able to distinguish low, moderate and high concentrations.