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. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Jul 5;1093-1094:119–127. doi: 10.1016/j.jchromb.2018.07.004

Table 2.

Calibration equations and coefficients of determination (R2) for calibration curves created over 3 days.

Day Equation R2
1 y = 0.09679x + 0.006831 1
2 y = 0.08767x + 0.01078 0.9996
3 y = 0.08252x + 0.008578 0.9999