Measured Concentrations of Inositol (μM)       Expected Concentration Analysis No.: 1 2 3 4 5 6 Mean SD* CV* 700 μM   673.6 669.6 667.1 659 667.8 690.7 671.3 10.6 1.58%   %error: -3.77 -4.34 -4.7 -5.85 -4.6 -1.33 -4.1 1.5   300 μM   280.2 280.8 271.1 283.9 289.7 290.5 280.5 0.4 0.14%   %error: -6.59 -6.4 -9.65 -5.36 -3.44 -3.16 -6.5 0.1   100 μM   89.8 88.9 85.8 88 87.9 93.2 89.3 0.6 0.72%   %error: -10.21 -11.12 -14.24 -11.98 -12.13 -6.8 -10.7 0.6   * SD = standard deviation, CV = Coefficient of Variation

Table 2: Intraday Precision (Coefficient of Variation (CV) = standard deviation/mean x 100)) and Accuracy (Percentage Error (%error) = (measured concentration – expected concentration)/expected concentration x 100)) for 6 analyses of inositol on the same day in concentrations of 100 to 700 μM.