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Potentiometric titration of fulvic acids from lignite, in dimethylformamide and dimethylsulphoxide media

AutorAndrés Gimeno, José Manuel ; Romero, C.; Gavilán, José M.
Fecha de publicaciónnov-2001
EditorElsevier
CitaciónTalanta - the International Journal of Pure and Applied Analyt Chemistry 34, 6: 583-585 (1987)
ResumenPotentiometric titrations in dimethylformamide and dimethylsulphoxide have been performed in order to differentiate between the acidic groups of fulvic acids. With dimethylformamide as medium the best results have been obtained with potassium hydroxide as titrant, whereas both potassium hydroxide and tetrabutylammonium hydroxide yield good titrations in dimethylsulphoxide. The number of acidic groups differentiated depended on the solvent and titrant used; in the best case four sharp end-points were obtained. Titrations with potassium hydroxide are preferred.
Versión del editorhttps://doi.org/10.1016/0039-9140(87)80195-9
URIhttp://hdl.handle.net/10261/167702
DOI10.1016/0039-9140(87)80195-9
ISSN0039-9140
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