Oxidations with potassium permanganate in the presence of fluoride

Issa, I. M.; Hamdy, M.

doi:10.1007/bf00449133

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…Effect of Temperature. Lead sulfide-impregnated silicone rubber membrane electrode could be used in the temperature range from 10 to 70 °C with the correction on temperature coefficient.…”

Section: Resultsmentioning

confidence: 99%

“…In some procedures (1-5), selenium(IV) has been determined by adding a known amount of reductant and back-titrating the excess after filtering off the selenium metal. In other procedures (6)(7)(8)(9)(10)(11), a known amount of oxidant is added and the excess determined. As no one so far suggested conditions under which a direct titration of selenium(IV) could be made, we have undertaken the study reported here.…”

Section: Resultsmentioning

confidence: 99%

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Lead sulfide-impregnated silicone rubber membranes as selective electrodes for lead ion

Hirata¹,

Date²

1971

Anal. Chem.

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“…Effect of Temperature. Lead sulfide-impregnated silicone rubber membrane electrode could be used in the temperature range from 10 to 70 °C with the correction on temperature coefficient.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Lead sulfide-impregnated silicone rubber membranes as selective electrodes for lead ion

Hirata¹,

Date²

1971

Anal. Chem.

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mentioning

confidence: 99%

Photometric titration of selenium(IV) with permanganate in sulfuric acid using condensed phosphoric acid as accelerator

Rao¹

1971

Anal. Chem.

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ering the swelling of the surface of the membrane and the easiness of ion-exchange process on it, the soaking solution had better contain lead ion.When the surface of the membrane was polished or cut off to get rid of the thin layer of silicone rubber and the membrane was soaked in the test solution, many air bubbles adsorbed on its surface and the measurement of the potentials was impossible. The potentials of the polished membrane were unstable even after it was soaked for a long time. When a small amount of silicone oil was applied to the surface of the polished membrane, the air bubble did not adsorb in the test solution and the potentials of the membrane became stable and steady. These results mean that the surface of the membrane should be very smooth and that the intimate contact be-tween it and the solution is indispensable. In order not to contaminate the test solution or weaken the membrane, mechanical method for exposing the particles of PbS on the surface should not be applied. ACKNOWLEDGMENTThe authors thank S. Kisaka and K. Sugihara for their encouragement in this work. Thanks are also due to Y. Hioki and H. Yamao for their X-ray and electron microscopic measurements.

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Die jodometrische Mikrobestimmung von Selen, Selen-Kupfer- und Kupfer-Chrom-Gemischen

Schäfer

1975

Mikrochim Acta

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Oxidations with potassium permanganate in the presence of fluoride

Cited by 6 publications

References 5 publications

Lead sulfide-impregnated silicone rubber membranes as selective electrodes for lead ion

Lead sulfide-impregnated silicone rubber membranes as selective electrodes for lead ion

Photometric titration of selenium(IV) with permanganate in sulfuric acid using condensed phosphoric acid as accelerator

Die jodometrische Mikrobestimmung von Selen, Selen-Kupfer- und Kupfer-Chrom-Gemischen

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