Przykładowe obliczenia:

$$\frac{A^{k} - A}{A - A^{z}} = \frac{0,5917 - 0,5614}{0,5614 - 0,1226} = 0,06251$$

$$\frac{A{- A}^{k}}{A^{z} - A} = \frac{0,0892 - 0,0424}{1,3439 - 0,0892} = 0,0373$$

$$\frac{0,509({2z}_{k} - 1)\sqrt{I}}{1 + \sqrt{I}} = \frac{0,509(0 - 1)\sqrt{0,163}}{1 + \sqrt{0,163}} = - 0,146$$

$$f\left( A,I \right) = log\frac{A^{k} - A}{A - A^{z}} + \frac{0,509({2z}_{k} - 1)\sqrt{I}}{1 + \sqrt{I}} = \log\left( 0,06251 \right) + \left( - 0,146 \right) = - 1,35$$

pK=pH- f(A,I)=6-(-1,35)=7,35

$$\delta_{pK1} = \sqrt{\frac{\left( 7,32 - 7,35 \right)^{2} + \left( 7,32 - 7,31 \right)^{2} + \left( 7,32 - 7,16 \right)^{2} + \left( 7,32 - 7,36 \right)^{2} + \left( 7,32 - 7,40 \right)^{2}}{5 - 1}^{}} = 0,090324 \approx 0,09$$