A reductometric determination of Os(VIII) with a standard solution of a ferrous salt in alkaline mannitol or triethanolamine media

Chughtai, N. A.; Sharma, Daksha; Doležal, J.; Zýka, J.

doi:10.1007/bf01217820

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Potentiometric Titration With Copper(ii)-tea Complex1

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2000

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“…The procedure for the preparation of the reduced CI Sulphur Black 1 solution was similar to the potassium hexacyanoferrate(III) titration but a higher amount of sodium hydroxide (20 ml 1 mol/l) was added. Besides the use of 0.05 mol/l tin(II) chloride solution, a 0.05 mol/l iron(II) triethanolamine (TEA) complex solution was also used as reducing agent [19][20][21][22]. The sample containing the reduced CI Sulphur Black 1 was titrated with a solution containing 0.1 mol/l copper(II) sulphate complexed by 0.2 mol/l TEA and 0.1 mol/l potassium hydroxide.…”

Section: Potentiometric Titration With Copper(ii)-tea Complexmentioning

confidence: 99%

The redox behaviour of CI Sulphur Black 1 ‐ a'basis for improved understanding of sulphur dyeing

Bechtold

Berktold

Turcanu

2000

Coloration Technology

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The redox properties of Cl Sulphur Black 1 are studied by redox and potentiometric titration. The results permit a more detailed description of the dyestuff reduction at a molecular level. Dyeing experiments with selected reducing agents show that dyestuff reduction is important in order to obtain a certain colour depth. When tin(II) chloride or iron(II) triethanolamine are used as reducing agents, a maximum correlation between redox potential and observed colour depth can be derived and a redox potential for maximum dyestuff affinity can be determined.

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Section: Potentiometric Titration With Copper(ii)-tea Complexmentioning

confidence: 99%