Fulvic acids

The fulvic acids (also: fulvic acids ) are a group of organic acids with a non-uniform composition. Like humic acids and humins, they are formed during the decomposition of plant material ( humification ), but have a significantly lower molar mass and a more acidic character than humic acids . Fulvic acids are much more soluble in an acidic environment than humic acids, which can be used to separate the two groups of substances. They give water a brownish-yellowish color and increase its COD value.

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Entry on humic substances. In: Römpp Online . Georg Thieme Verlag, accessed on January 3, 2015.

Individual evidence

↑ Hans Joachim Fiedler: Soils and soil functions in ecosystems, landscapes and urban areas . expert verlag, Renningen 2001, ISBN 978-3-8169-1875-2 , p. 41 ( limited preview in Google Book search).
↑ Rolf Pohling: Chemical reactions in water analysis . Springer-Verlag, Berlin / Heidelberg 2015, ISBN 978-3-642-36354-2 , p. 60 ( limited preview in Google Book search).

[1] Hans Joachim Fiedler: Soils and soil functions in ecosystems, landscapes and urban areas . expert verlag, Renningen 2001, ISBN 978-3-8169-1875-2 , p. 41 ( limited preview in Google Book search).

[2] Rolf Pohling: Chemical reactions in water analysis . Springer-Verlag, Berlin / Heidelberg 2015, ISBN 978-3-642-36354-2 , p. 60 ( limited preview in Google Book search).