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Apocrenic acid

Quell-reife, /. sufficient steeping, -salz, n. spring salt, well salt. -satzsSure, /. apocrenic acid, -saure, /. crenic acid, -schicht, /. swelling layer, -sole, /. spring brine, well brine, -stock, m. steep tank, steeping cistern. -substanz,/. substance that swells. [Pg.354]

Crenic acid and Apocrenic acid, the components soluble in water... [Pg.7]

Humic acid, CkTUCU (or C0II30FUlmic acid, C10H3oOi5 Crenic acid, C10H21O16 Apocrenic acid, C21H12Oi2... [Pg.7]

Fulvic acid Soluble in alkali, not precipitated by acid Crenic acid, apocrenic acid Glucic acid, apocrenic acid Fulvic acid ... [Pg.16]

Crenlc acid (Berz Apocrenic acid elius) Brown humic acids Gray humic acids (Springer)... [Pg.25]

It has been known since the earliest studies that humic substances formed insoluble salts with a wide range of metal ions. Many di-, tri-, or tetravalent ions will bring about the precipitation of a greater or lesser amount of humic substances from solution. An early example of this was the use of copper to precipitate apocrenic acid and crenic acid (Berzelius, 1839). In modern times the technique has been used with some success by Dubach et al. (1961) and Sowden and Deuel (1961). [Pg.393]

Berzelius (1833) appears to have pioneered a serious study of OM in natural waters. He discovered the dissolved organic compounds with acidic properties in the mineral spring Porla (Sweden). These compounds were called crenic and apocrenic acids. Berzelius assumed that their salts were washed out from soil humus intact . Oden (1919) found the common term for these acids — fulvic acids (fulvus = yellow). Aschan (1932) attributed them to the water humus group, being typical for peat, river and lake waters. [Pg.151]

The deposit was extracted with caustic potash solution and excess of acetic acid and copper acetate solution added dark brown copper apocrenate was precipitated. Ammonium carbonate then precipitated light green copper crenate from the filtrate. By decomposing the copper salts in water by hydrogen sulphide solutions of the acids were formed. These on evaporation in vacuum left amorphous yellow crenic acid and dark brown apocrenic acid. [Pg.311]

Mulder investigated humic and ulmic acids and humus substance, and determined the amounts of apocrenic, crenic, and humic acids in fertile soil. He gave the formulae crenic acid apocrenic acid ulmic... [Pg.311]

Apocrenic acids - torfic acid, apotorfic acid, arvic acid, apoarvic acid, porla apocrenic acid insoliible in acids... [Pg.8]

Koganovskii, A.M. Influence of electrolytes on the micelle formation of humic and apocrenic acids, and on their adsorption from aqueous solutions. Kolloidnyi Zhumal 1962, 24(1), 34-41. [Pg.85]

See other pages where Apocrenic acid is mentioned: [Pg.6]    [Pg.9]    [Pg.15]    [Pg.15]    [Pg.17]    [Pg.390]    [Pg.151]    [Pg.506]    [Pg.602]    [Pg.8]    [Pg.8]    [Pg.10]    [Pg.10]    [Pg.11]    [Pg.125]   
See also in sourсe #XX -- [ Pg.15 , Pg.20 , Pg.390 ]

See also in sourсe #XX -- [ Pg.7 , Pg.9 ]



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