The Well-Tempered Calibration

Choose sufficient calibration concentrations to cover the range and give a suitable confidence interval on measurement [Pg.154]

Make up calibration solutions independently from reference materials with traceable purities or concentrations. Serial dilutions of a stock solution should be avoided. [Pg.155]

Choose the solutions for measurement randomly. Do not start at the least concentrated solution and work up to the most concentrated. [Pg.155]

Inspect a residual plot and recalculate the regression, if necessary, after remeasuring solutions that give apparent outliers and after defining the linear range. [Pg.155]

Calculate and quote the standard error of the regression. Calculate 95% confidence intervals on any concentration calculated from the calibration relation. If required, quote the regression equation with standard deviations (or 95% confidence intervals) on slope and intercept. [Pg.155]

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