pH-value (potassium chloride)

pH (KCl)

The pH-value in a suspension of sample material and a diluted potassium solution corresponds to the potential acidity.

The hydrogen-cations adsorbed to the sample constituents are replaced by potassium cations and are therefore measurable in the suspension. The resulting pH is about 0.3-1.0 units lower compared to the pH in a suspension with pure water. The potential acidity is important because cation exchange may also occur under natural conditions and lead to significant drops in pH.


Soil Soil is livelihood and biosphere for humans, animals, plants and soil organisms. All the substances brought in are transported, transformed and/or accumulated in the soil.

Sampling area

BR/NP Berchtesgaden The only high mountains national park in Germany and an area of the Limestone Alps with international relevance
Saarländischer Verdichtungsraum Important, old-industrialised conurbation in Germany.
Bornhöveder Seengebiet Main water divide between the North- and Baltic Sea
NP Bayerischer Wald Germany's first national park
Verdichtungsraum Halle-Leipzig Region in the chemical triangle of Central Germany
NP Harz Germany's largest forest national park
Solling Second highest and largest low mountain range in Northern Germany
BR Pfälzerwald Germany's largest connected forest area in a range of low mountains
Oberbayerisches Tertiärhügelland The Upper Bavarian Tertiary Uplands are a part of the Southern German Molasse Basin

Sampling period

2002 - 2014