1960
DOI: 10.1002/jpln.19600900107
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Über die schonende Gewinnung natürlicher Huminstoffe mit Hilfe milder organischer Lösungsmittel

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Cited by 25 publications
(13 citation statements)
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“…They are probably the result of complex reactions that took place during and/or after the extraction with organic solvents ( Flaig et al, 1975). However, it can be mentioned that the preextraction may remove humic precursors with carboxyls rich in oxygen, phenolic and alcoholic O H groups, resulting in a residual increase of C and decrease of 0 in the preextracted substances ( Scheffer et al, 1960). It is also known ( Khairy and Ziechmann, 1981) that extraction with NaOH causes decarboxylation and/or it breaks the aromatic rings.…”
Section: Resultsmentioning
confidence: 99%
“…They are probably the result of complex reactions that took place during and/or after the extraction with organic solvents ( Flaig et al, 1975). However, it can be mentioned that the preextraction may remove humic precursors with carboxyls rich in oxygen, phenolic and alcoholic O H groups, resulting in a residual increase of C and decrease of 0 in the preextracted substances ( Scheffer et al, 1960). It is also known ( Khairy and Ziechmann, 1981) that extraction with NaOH causes decarboxylation and/or it breaks the aromatic rings.…”
Section: Resultsmentioning
confidence: 99%
“…Nichthuminstoffe wurden im Soxhlet mit Diathylather, Aceton und Dioxan nacheinander extrahiert ( Scheffer et al, 1960). Die Huminstoffe wurden aus den mit organischen Losemitteln extrahierten Bodenproben in Dimethylformamid, dann nach Behandlung mit Salzsaure und 0.1 N Natronlauge gewonnen.…”
Section: Gewinnung Der Organischen Substanzenunclassified
“…Losungsmittel unterschiedlicher Polaritat eignen sich zur schrittweisen Extraktion organischer Bodensubstanzen (Scheffer et al, 1960; Sciacovelli et al, 1977Sciacovelli et al, , 1980. Wahrend Petrolether bevorzugt Fette, Wachse, o l e lost, lassen sich mit Dioxan bereits komplexe Molekiile aufbrechen.…”
Section: Introductionunclassified