A study of the cobalt-ferricyanide reaction with relation to the determination of cobalt in steel

Bagshawe, B.; Hobson, J. D.

doi:10.1039/an9487300152

Cited by 14 publications

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“…In such cases, texts such as Scott's "Standard Methods of Chemical Analysis" {28) are of great value. In the same category as Scott's compendium of methods are such publications pertaining to particular or specific fields as "Analytical Methods for Aluminum Alloys " {2) or "Chemical Analysis of Aluminum" (7). Electroanalysis has continued to be an important procedure in nonferrous analytical laboratories.…”

Section: Methodsmentioning

confidence: 99%

Ferrous Metallurgy

Beeghly¹

1949

Anal. Chem.

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Section: Methodsmentioning

confidence: 99%

Ferrous Metallurgy

Beeghly¹

1949

Anal. Chem.

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“…Some disagreement appears in the literature also as to the interference of chromium, either in the trior the sexivalent state. In any case, the potential break is not as great as might be desired and becomes even smaller with increasing amounts of cobalt (1).…”

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confidence: 90%

“…In general, it has proved far superior to the other volumetric methods for cobalt and it has been widely adopted for the determination of cobalt in ferrous and nonferrous alloys. The completeness of the reaction has been disputed (1,10), and the quantitative aspects of the reaction of manganese with ferricyanide under the conditions of the titration appear unsettled. Some disagreement appears in the literature also as to the interference of chromium, either in the trior the sexivalent state.…”

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confidence: 99%

Ferricyanide Titration of Cobalt Using Ethylenediamine

Diehl¹,

Butler²

1955

Anal. Chem.

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The titration of cobalt in ammoniacal solution with potassium ferricyanide has been modified by the replacement of ammonia by ethylenediamine. The cobalt(l l)-ethylenediamine complex is a strong reducing agent and its potentiometric titration involves a much larger break than that with the corresponding ammonia complex. The potentiometric determination of cobalt, either directly or by back-titration, is successful if ethylenediammonium sulfate is present as well as ethylenediamine and if oxygen is rigidly excluded.Cobalt and manganese can be determined successively on the same sample except when large amounts of iron are present. The method is applicable to cobalt-bearing stainless steels and bronzes and to Stellite.LITERATURE CITED

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Cobalt Compounds

Richardson¹

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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An overview of cobalt compounds including the chemistry exhibited by the +2 and +3 valences is presented emphasizing those compounds of industrial significance. Methods of manufacture for many of the commercial compounds are given as is transition‐metal separation methodology. The biological role of cobalt in humans and ruminants is discussed. The primary use of cobalt compounds is in catalysis for hydrotreating petroleum resulting in hydrodesulfurization. Cobalt catalysts are also used to denitrify, deoxgenate, crack crude oil and gas, and in homogeneous oxidation and the oxo process (hydroformylation). Cobalt compounds are used in pigments for paints and priting iks, as colorants for glass, ceramics, and enamels, and in the form of metallic soaps as driers. Less significant industrial uses are in electronics, agriculture as feed and soil additives, and as an adhesive in the tire industry.

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A study of the cobalt-ferricyanide reaction with relation to the determination of cobalt in steel

Cited by 14 publications

References 0 publications

Ferrous Metallurgy

Ferrous Metallurgy

Ferricyanide Titration of Cobalt Using Ethylenediamine

Cobalt Compounds

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