pH-value (calcium chloride)
pH (CaCl2)
The pH-value in a suspension of sample material and a diluted calcium chloride solution corresponds to the potential acidity.
The hydrogen cations adsorbed to the sample constituents are replaced by calcium 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.
Specimen
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Fine insoluble mineral or organic particles in the water phase
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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
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The only high mountains national park in Germany and an area of the Limestone Alps with international relevance
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Important, old-industrialised conurbation in Germany.
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Main water divide between the North- and Baltic Sea
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Longest river in Germany
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Germany's first national park
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Fourth largest river basin in Central Europe
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Region in the chemical triangle of Central Germany
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Germany's largest forest national park
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Second highest and largest low mountain range in Northern Germany
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Germany's largest connected forest area in a range of low mountains
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The Upper Bavarian Tertiary Uplands are a part of the Southern German Molasse Basin
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Second largest river in Europe
Sampling period
2002 - 2020