Separation of Sulphate and Hydrogen Sulphate Ions from Interfering Substances by Adsorption on Aluminium Oxide, Prior to Sulphate Determination.

Nydahl, Folke; Gustafsson, Lilly; Lindström, Lars-Algot; Westermark, Henrik; Steensgaard, Inger; Rosenberg, Th.

doi:10.3891/acta.chem.scand.07-0143

Cited by 17 publications

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“…The control series was treated in the same manner. (Nydahl and Gustafsson 1953) is the reason for the selection of this method. Probably, it is primarily the interfering effect of the organic matter that is eliminated in this way.…”

Section: Reliability Of Methodsmentioning

confidence: 99%

Sulphur status in Finnish cultivated soils

Korkman

1973

AFSci

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A method for determining total sulphur in plant material and soil samples using the induction furnace technique and subsequent turbidimetric determination of sulphate sulphur was discussed. A procedure for extracting sulphur from soil samples with ammonium acetate (pH 4.65), the interference of the organic matter being reduced by oxidation of the extract with H2O2, was proposed. Sulphur balance in Finnish cultivated soils was estimated by taking into account the average amounts of emitted (8 kg S/ha/yr.), precipitated (8 kg S/ha/yr.) and leached (8 kg S/ha/yr.) sulphur. The actual situation in the cultivated soils seems thus to be depending, on an average, on the uptake by plants and the sulphur applied (12 kg S/ha/yr. in the early 1970s). In 104 samples of cultivated soil, the content of total sulphur showed a slight correlation with the content of organic carbon. The amounts of sulphur extracted in various ways were not predictable by means of the soil characteristics used (pHCaCl2, org. C and texture). Extracted sulphur did not correlate sufficiently with the development and sulphur uptake of plants. Under field conditions in northern Finland, sulphur application produced a relatively distinct result in respect both to the ley yields on Carex peat, and their sulphur content. On mineral soils in southern Finland the yields were unaffected by supplementary fertilization with sulphur. In the pot experiments performed a fairly close relationship between sulphur and nitrogen was demonstrated.

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Section: Reliability Of Methodsmentioning

confidence: 99%

Sulphur status in Finnish cultivated soils

Korkman

1973

AFSci

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“…The "exchange" or adsorptive properties of aluminum hydroxide are strongly influenced by the pH at which the exchange is performed [5,6,7,8]. Aluminum hydroxide behaves as an anion exchanger at low pH [5] and as a cation exchanger at a pH above 8 [6,7,8] _ The exchange capacity of aluminum hydroxide is not a true one and depends on the experimental conditions at which the exchange is performed [9].…”

Section: (3)mentioning

confidence: 99%

Calcium‐Magnesium Exchange in Aluminum Hydroxide‐Coated Montmorillonite

Levy

Tamura

1973

Israel Journal of Chemistry

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Aluminum hydroxide-coated montmorillonites have been shown to exhibit exchange properties which differ from those of pure montmorillonites. The direction of change was found to depend on the coating method used and the pH at which the coating is applied. The aluminum hydroxide-coated montmorillonites were prepared by two different methods at two pH's: (1) reacting aluminum chloride and sodium hydroxide in the presence of the clays (pH 7), and (2) titrating aluminum-saturated clays with calcium hydroxide to an alkaline pH (-10). The resulting clay systems were equilibrated with calcium-magnesium solutions. The first system showed preferential adsorption of calcium over magnesium because the clays contained exchangeable sodium due to the precipitation of aluminum hydroxide in the presence of the clay. The second syste!J1 showed no preference either for calcium or for magnesium. A distribution coefficient of unity resulted from compensation of exchangeable calcium by magnesium released from the aluminum hydroxide.

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Inorganic adsorption and precipitation chromatography

Hayek

1960

Chromatographic Reviews

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Separation of Sulphate and Hydrogen Sulphate Ions from Interfering Substances by Adsorption on Aluminium Oxide, Prior to Sulphate Determination.

Cited by 17 publications

References 0 publications

Sulphur status in Finnish cultivated soils

Sulphur status in Finnish cultivated soils

Calcium‐Magnesium Exchange in Aluminum Hydroxide‐Coated Montmorillonite

Inorganic adsorption and precipitation chromatography

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