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Ocean Optics pH Sensor Patches, Probes and Cuvettes User Manual

Page 32

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A: Algorithms Used

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PHSENSOR-TRANS-REFLECT-201111

…for each of the buffers. The y-axis shows the pH value of the buffers. This generates a plot such as the
one shown below:

Performing a linear fit gives a line with pK equal to the y-intercept and slope equal to the slope. In the
example chart above, the new pK value would be 6.30 and the new slope value would be 1.72.