pH Measurement

Penetration, spear-tip, flat-surface and slurry methods expose the electrode to different matrices. Protein, fat, salt and low moisture can foul the junction or slow response, so an instrument suitable for aqueous buffers may perform poorly in meat.

Calibrate or verify with fresh buffers that bracket the expected product range and follow the instrument’s temperature instructions. A single-point adjustment may detect gross drift but does not establish slope across the working range.

Define the location, depth and preparation method before testing. Direct insertion, minced samples and water slurries can give different results, and dilution must never be presented as equivalent to direct product pH without a validated method.

Allow the value to stabilise, avoid pressure that damages the glass membrane and rinse between samples with suitable water. Store the electrode in the specified solution rather than dry or in unsuitable cleaning chemicals.

Record product, batch, location, time, temperature, instrument, calibration and result. Product-specific targets and fermentation curves control decisions; one universal pH threshold cannot describe every cured meat.