Paste pH bench

Sample

Probe

Dilution

by mass, paste : water

Paste weighed

Paste density

g/mL; ~1.30 at 64 °Brix

Water alkalinity

mg/L as CaCO₃; 0 for distilled

Readings

Route

Acid mix

Slurry pH

at the dilution above

Read at

°C

NaOH molarity

mol/L

Volume to pH 8.2

mL, titrating the slurry sample

Slurry sample titrated

g of slurry in the titration beaker

Electrode

Meter shows

Buffer 1 pH

Buffer 1 mV

Buffer 2 pH

Buffer 2 mV

Buffer temperature

°C

Paste pH, corrected from the slurry

Paste pH, estimate

–

ideal to activity-corrected

Shift applied

–

paste minus slurry

Route

–

TA of the paste

–

meq / 100 g

Ionic strength, paste

–

mol/L, estimate

Indicative reading at 20 °C

–

−0.002 per °C, Low

Electrode check

Slope

–

mV per pH

Efficiency

–

% of Nernst

Offset at pH 7

–

Sample recipe

–

For the base-dose planner

–

The link opens the base-dose planner with these as the native pH and TA of the first ingredient (set its mass there). The corrected paste pH is the "measure cold" value the two-pass base procedure refers to.

A measurement aid. The corrected value is an estimate; log the measured slurry value alongside it. Colorimetric strips cannot be read against a dark paste, and a diluted slurry is still coloured, so there is no strip mode.