Über die Anwendung von Chloramin (p-Toluolsulfochloramin-Natrium) in der Maßanalyse

Komarowsky, A. S.; Filonowa, Wera Feodorowna; Korenman, I. M.

doi:10.1007/bf01368144

Cited by 4 publications

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“…With the concentration of hypophosphite four times that of thallium(III), the effect of acid, chloride, and bromide concentrations on the speed of the reaction was studied in perchloric acid medium and the conditions optimized. Chloride catalyses the photochemical reduction of thallium(II1) in the presence of excess hypophosphite as the oxidation of hypophosphite to phosphite is sufficient to bring about the quantitative reduction of thallium(II1) to thallium (1). As already pointed out, this stage of the reaction is catalysed by chloride.…”

Section: Estimation Of Tkallium(iii)mentioning

confidence: 89%

“…Interferences Cd(II), Zn(II), Ru(III), Co(II), Ni(II), Hg(II), Al(III), Pb(II), NH,', Na+, K + , ~a ' + , ~a " , SO,'-, CH'COO-, PO,'-, 2,2'-bipyridyl, and 1,lO-phenanthraline do not interfere even if they are present in 100-fold excess over hypophosphite. Traces of oxalate and phosphite interfere by reducing thallium(II1) to thallium (1). Arsenite interferes with the bromatometric titration method; Cu(L1) up to 0.05 M does not interfere, but at high concentrations its colour interferes with detection of the end point in the bromatometric titration.…”

Section: Reconznzended Procedures For the Titrirnetric Estimutiorz Of mentioning

confidence: 99%

“…microquantities of hypopkospkite The absorption spectra (26) of thallium(1) and thallium(II1) alone in a medium containing 1 M perchloric acid and 0.1 M hydrochloric acid show that thallium(II1) absorbs at 260 nm (molar absorptivity E = 9150 L M-' cm-') while thallium (1) has no absorbance at this wavelength. In this method an excess of thallium(II1) is allowed to react with hypophosphite either photochemically (using bromide as a catalyst) or thermally.…”

Section: Spectropkotornetr-ic Metkocl For the Estirncction Ofmentioning

confidence: 99%

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Thallimetric oxidations Part VII: Titrimetric and spectrophotometric methods for the determination of hypophosphite and ternary mixtures of hypophosphite, phosphite, and oxalate

Rao¹,

Rao²,

Ramana³

et al. 1993

Can. J. Chem.

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. Can. J. Chem. 71, 80 1 (1993). Titrimetric and spectrophotometric methods are developed for the estimation of hypophosphite (PO:-) at mmol and micromol ranges, respectively. In these methods thallium(II1) is used as an oxidant and the reduced thallium(1) is determined either oxidimetrically by potassium bromate in the titrimetric method or by measurement of the optical density of thallium(II1) at 260 nm in the presence of 0.1 M NaCl and 1 M HC10, in the spectrophotometric method. Convenient methods are described for the determination of ternary mixtures of hypophosphite (poZ3-), phosphite PO^^-), and ox-A method is also described for the estimation of thallium(II1) using hypophosphite as reductant, and the method is applied to the determination of mixtures of thallium (1) (1) produit soit d'une f a~o n oxydimktrique, par le bromate de potassium dans la mkthode titrimktrique, soit par la mesure de la densitk optique du thallium(III), i 260 nm, en presence de NaCl 0,l M et de HCIO, 1 M, dans la mkthode spectrophotomktrique. On dkcrit des mkthodes faciles pour la determination d'ions hypophosphite (PO:-), phosphite (PO:-) et oxalate (c~o:-) dans des mClanges tertiaires. On dkcrit aussi une mkthode de dktermination de la concentration du thallium(II1) qui fait appel B I'hypophosphite comme rkducteur; on a appliquk la mkthode a des melanges de thallium(1) et de thallium(II1).[Traduit par la rkdaction]

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Section: Estimation Of Tkallium(iii)mentioning

confidence: 89%

Section: Reconznzended Procedures For the Titrirnetric Estimutiorz Of mentioning

confidence: 99%

Section: Spectropkotornetr-ic Metkocl For the Estirncction Ofmentioning

confidence: 99%

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Thallimetric oxidations Part VII: Titrimetric and spectrophotometric methods for the determination of hypophosphite and ternary mixtures of hypophosphite, phosphite, and oxalate

Rao¹,

Rao²,

Ramana³

et al. 1993

Can. J. Chem.

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Studien über die Einsparung von Jod und Jodiden in der Maßanalyse. Die Verwendung von Chloramin

Poethke¹,

Wolf²

1952

Zeitschrift anorg allge chemie

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InhaltsubersichtUntersuchungen uber die Bestandigkeit 0,l n Chloraminlosungen, die sich uber fast 11/, Jahre erstreckten, fuhrten zu dem Ergebnis, daB eine solche Losung bei Verwendung eines reinen Praparates sehr gut haltbar ist und nur in Abstanden yon zwei bis drei Monaten kontrolliert zu werden braucht.Fur Titrationen in saurer Losung ist Chloramin nur geeignet, wenri die Umsetzung mit dem zu oxydierenden Stoff schnell erfolgt. Sehr glatt lassen sich AslIT und SbTIr in saurer Losung titrieren; geeignete Indikatoren sind p.Athoxychrysoidin und Brillantcarmoisin. Bei der Bestimmung von Eisen(I1)-salzen und Hexacyanoferraten(I1) muB Chloraminlosung in geringerem Uberschui3 zugegeben und dieser mit As,O,-Lnsung zuruckgemessen werden.

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Determination of thiocyanate with aromatic halosulphonamides in acid and alkaline media

1983

Talanta

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Über die Anwendung von Chloramin (p-Toluolsulfochloramin-Natrium) in der Maßanalyse

Cited by 4 publications

References 0 publications

Thallimetric oxidations Part VII: Titrimetric and spectrophotometric methods for the determination of hypophosphite and ternary mixtures of hypophosphite, phosphite, and oxalate

Thallimetric oxidations Part VII: Titrimetric and spectrophotometric methods for the determination of hypophosphite and ternary mixtures of hypophosphite, phosphite, and oxalate

Studien über die Einsparung von Jod und Jodiden in der Maßanalyse. Die Verwendung von Chloramin

Determination of thiocyanate with aromatic halosulphonamides in acid and alkaline media

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