8.000.5051EN - Metrohm

pH measurementThe pH value is of paramount importance for biologicalsystems. It influences the growth of microorganisms, thecolor and hue, the taste, the redox potential, the ratio offree to bound SO 2, the possibility for forming or preventingiron phosphate cloudiness, etc.05There is no direct correlation between the pH value andthe content of total titratable acid, but there is an (em -piri cal) relationship between the pH value and the ratioof potassium hydrogen tartrate to tartaric acid.For wines and spirits, the flat membrane electrode is re -commended as a universal pH electrode. The Unitrodeexcels in its short ad justment times following temperaturechanges and is protected from contamination by itsfixed ground-joint diaphragm.pH value in wine samples with the pH meter• Easy to use thanks to a well-structured multiple-linedisplay• Automatic buffer recognition• Robust electrodes• Extensive range of accessories from a single sourceVery cost-effective pH meter − the 827 pH lab as a laboratory setupBuffer sachetsBuffer solutions pH 4, 7, and 9 in sachets guarantee precisecalibration of the pH electrode826 pH mobile as a portable pH meter for on-site use