Use of the Intercept Method in Determining the Calcite‐Dolomite Ratio for Rating Agricultural Limestones<sup>1</sup>

Brydon, J. E.; Rice, H M A

doi:10.2134/agronj1965.00021962005700030018x

Cited by 5 publications

(4 citation statements)

References 3 publications

(8 reference statements)

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“…When this treatment was applied to soils, or other mixed sediments, X-ray diffraction patterns of residues showed incomplete dissolution of calcite. Earlier studies (Buehrer and Williams, 1936;Lahav and Bolt, 1963), suggested that soil carbonates may exist with coatings. In the resent study it was to the citrate to help their removal.…”

Section: Resultsmentioning

confidence: 95%

“…Because the rate of CO, release from carbonate minerals is dependent upon particle size and surface area (Brydon and Rice, 1965) and because of the possibility of carbonate coatings (Buehrer and Williams, 1936;Lahav and Bolt, 1963 , erroneous results may be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Different rates of reaction and release of CO, from carbonates treated with excess HC1 have been used to determine calcite and dolomite quantitatively in limestones and soil samples (Skinner et al, 1959). Because the rate of CO, release from carbonate minerals is dependent upon particle size and surface area (Brydon and Rice, 1965) and because of the possibility of carbonate coatings (Buehrer and Williams, 1936;Lahav and Bolt, 1963 , erroneous results may be obtained.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Determination of Calcite and Dolomite in Soils

Petersen¹,

Chesters²,

Lee³

1966

Journal of Soil Science

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Soil carbonates were differentiated into calcite and dolomite and determined quantitatively by a method based on their differential solubilities in 0.30 M Na c i t r a t~. 1 4 M Na dithionite. Calcite dissolution was favoured by the acidic and chelating nature of the citrate. Prior destruction of iron-oxide coatings on soil carbonates and/or iron oxide-carbonate complexes by the citrate-dithionite ironremoval process was necessary for complete calcite dissolution. This method consisted of a total carbonate determination, selective dissolution of calcite with a citrate-dithionite extraction, and determination of dolomite by difference.Citrate-dithionite soluble calcite and dolomite are calculated from the quantities of extracted Ca and Mg. Soil exchangeable Ca and Mg may interfere and should be removed prior to citrate-dithionite extraction on soils of high exchange capacity and/or low carbonate content. Interferences arising from dissolution of non-carbonate Ca-and Mg-containing soil minerals were considered negligible.Replicate analyses of a broad spectrum of samples suggest that the method is highly satisfactory for the determination of calcite and dolomite contents of soils and sediments of very variable composition. The occurrence of dolomite appears to be related to dolomitic source areas and is detritial whereas calcite is primarily reprecipitated (secondary) carbonates, although some calcite may be of detritial nature, e.g. shell materials or calcitic limestone drift.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantitative Determination of Calcite and Dolomite in Soils

Petersen¹,

Chesters²,

Lee³

1966

Journal of Soil Science

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“…Williams (1949), Martin and Reeve (1955), Skinner and Halstead (1958), Skinner et al (1959), Turner and Skinner (1960), Woodward (1961), Brudon and Rice (1965) and Allison and Moodie (1969) For personal use only. For personal use only.…”

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confidence: 99%

Carbonate Determination in Organic Soils

Lierop¹,

MacKenzie²

1974

Can. J. Soil. Sci.

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An examination of procedures for determining carbonates in soils and related materials

Nômmik¹

1974

Communications in Soil Science and Plant Analysis

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A number of procedures were tested for determining carbonate-C in soils and limestones, using a simple technique for digesting and collecting the CO2, previously described by the author 10 . Some of the procedures appeared suitable for removing and quantifying carbonate-C prior to the determination of organic-C. Depending on the digestion solution and the length of treatment, between 0.25 and 0.68 % of the organic-C in cultivated mineral soils was released as CO2 during the digestion, and thus included in the figures for carbonate-C.The study includes furthermore, an examination of the effects of particle size and the length of the heating period on the rate of dissolution of calcite and dolomite. A semi-quantitative EDTA extraction procedure is described for separation of these minerals in limestones.

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Use of the Intercept Method in Determining the Calcite‐Dolomite Ratio for Rating Agricultural Limestones¹

Cited by 5 publications

References 3 publications

Quantitative Determination of Calcite and Dolomite in Soils

Quantitative Determination of Calcite and Dolomite in Soils

Carbonate Determination in Organic Soils

An examination of procedures for determining carbonates in soils and related materials

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Use of the Intercept Method in Determining the Calcite‐Dolomite Ratio for Rating Agricultural Limestones1

Cited by 5 publications

References 3 publications

Quantitative Determination of Calcite and Dolomite in Soils

Quantitative Determination of Calcite and Dolomite in Soils

Carbonate Determination in Organic Soils

An examination of procedures for determining carbonates in soils and related materials

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Use of the Intercept Method in Determining the Calcite‐Dolomite Ratio for Rating Agricultural Limestones¹