Coulometric Titration of Dyes with Externally Generated Titanous Ion

Parsons, Jonathan; Seaman, William

doi:10.1021/ac60098a009

Cited by 21 publications

(4 citation statements)

References 5 publications

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“…One plate batch equilibrations of several azo compounds in the 10 taining only one or two polar substituents, are used to determine the increase in dye uptake as a function of various polar groups, number of aromatic rings, and hydrogen ion concentration. Initial column studies show some of the advantages of PVP in quantitating azo compounds in comparison to some of the past methods such as reduction with various reducing or hydrogenating agents like titanous and chromous ions (20), electrochemical titrations (21,22), or reaction gas chromatography (23). It not only enables quantitative analysis of trace organics by concentration, it does it simply and without elaborate reaction conditions.…”

mentioning

confidence: 99%

Separation and concentration of azo compounds with crosslinked poly(vinylpyrrolidone)

Mourey¹,

Carpenter²,

Siggia³

et al. 1976

Anal. Chem.

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mentioning

confidence: 99%

Separation and concentration of azo compounds with crosslinked poly(vinylpyrrolidone)

Mourey¹,

Carpenter²,

Siggia³

et al. 1976

Anal. Chem.

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“…Several reports on the coulometric titration with electrogenerated Ti(III) have been published. [26][27][28][29][30] Tanaka et al mentioned that the current efficiencies of the generation of Ti(III) from Ti(IV) were 100% for 0.5 mol L À1 to 1 mol L À1 Ti(IV) in 9 mol L À1 sulfuric acid on a platinum electrode, 100% for 0.1 mol L À1 to 1 mol L À1 Ti(IV) in 2 mol L À1 to 9 mol L À1 sulfuric acid on a graphite electrode, and 100% for 0.1 mol L À1 to 1 mol L À1 Ti(IV) in 2 mol L À1 to 9 mol L À1 sulfuric acid on a mercury electrode at an appropriate current density. 30 The current density 30 mA cm À2 was available to achieve a 100% current efficiency on a mercury electrode.…”

Section: Other Routes To Reduce Bromatementioning

confidence: 99%

Potassium bromate assay by primary methods through iodine liberation reaction

Asakai

Hioki

2013

Anal. Methods

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Analyses of bromate are of interest, especially from the viewpoint of controlling water and food quality. Currently, the lack of a potassium bromate reference material creates problems for the reliability of analytical measurements in those areas. Bromate whose concentration is traceable to the International System of Units (SI) is needed to ensure accurate and reliable measurements around the globe; however, no one has given the procedure of an accurate assay. Several document standards and texts describe the procedure of the titration and require different, insufficient titration conditions; the authors clarified an appropriate set of titration conditions. This paper describes the measurement procedure and assay of bromate with the linkage to the SI by primary methods. Gravimetric titration with thiosulfate whose concentration was standardised by coulometric titration with electrogenerated iodine was applied to the assay of bromate through the iodine liberation reaction. The appropriate iodine liberation conditions to titrate potassium bromate with sodium thiosulfate were clarified through examinations by electrochemical methods. Finally, an accurate determination method for bromate was first established with high accuracy and traceability to the SI by primary methods.

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“…A coulometric titration of dyes with externally generated titanous ion was reported by Parsons and Seaman (363). Titanous ion was generated electrolytically at the mercury cathode using constant current, and has been applied…”

Section: Generalmentioning

confidence: 99%