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1-Hydroxy-ethylidene-1,1-diphosphonic acid as a titrimetric agent

Identifieur interne : 001D81 ( Istex/Curation ); précédent : 001D80; suivant : 001D82

1-Hydroxy-ethylidene-1,1-diphosphonic acid as a titrimetric agent

Auteurs : R. P Ibil [Tchécoslovaquie] ; V. Vesel [Tchécoslovaquie]

Source :

Talanta [ 0039-9140 ] ; 1967.

RBID : ISTEX:860601B823870FABEE749A75DE7B339253999E30

English descriptors

KwdEn :
- Acidic medium, Acrd, Colour, Colour change, Complexing agent, Dcta, Dcta complexes, Dtpa, Durmg, Edta, Hedpha, Hydroxide, Large amounts, Nitric acid, Other metals, Rare earths, Scandium, Slight warming, Sodmm hydroxide, Standardized complexometrically, Ternary, Thorium, Thormm, Titrated, Titration, Ttha, Urotropine, Urotropine solution, Urotropme, Xylenol.
Teeft :
- Acidic medium, Acrd, Colour, Colour change, Complexing agent, Dcta, Dcta complexes, Dtpa, Durmg, Edta, Hedpha, Hydroxide, Large amounts, Nitric acid, Other metals, Rare earths, Scandium, Slight warming, Sodmm hydroxide, Standardized complexometrically, Ternary, Thorium, Thormm, Titrated, Titration, Ttha, Urotropine, Urotropine solution, Urotropme, Xylenol.

Abstract

Abstract: 1-Hydroxy-ethylidene-1,1-diphosphonic acid (HEDPHA) has been proposed as a highly selective titrimetric reagent for thorium. In the presence of 1,2-diaminocyelohexanetetra-acetic acid (DCTA) a soluble binuclear ternary complex, Th2(DCTA)2(HEDPHA), is formed. The determination of thorium is carried out in a slightly acidic medium, buffered with urotropine, with 0.025M HEDPHA, and Xylenol Orange as indicator. DCTA masks all bivalent metals, rare earths, scandium, yttrium, bismuth, iron, gallium and indium. Only zirconium, titanium, aluminium and large amounts of thallium(III) interfere.

Url:

https://api.istex.fr/document/860601B823870FABEE749A75DE7B339253999E30/fulltext/pdf

DOI: 10.1016/0039-9140(67)80245-5

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Le document en format XML

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<term>Complexing agent</term>
<term>Dcta</term>
<term>Dcta complexes</term>
<term>Dtpa</term>
<term>Durmg</term>
<term>Edta</term>
<term>Hedpha</term>
<term>Hydroxide</term>
<term>Large amounts</term>
<term>Nitric acid</term>
<term>Other metals</term>
<term>Rare earths</term>
<term>Scandium</term>
<term>Slight warming</term>
<term>Sodmm hydroxide</term>
<term>Standardized complexometrically</term>
<term>Ternary</term>
<term>Thorium</term>
<term>Thormm</term>
<term>Titrated</term>
<term>Titration</term>
<term>Ttha</term>
<term>Urotropine</term>
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<term>Urotropme</term>
<term>Xylenol</term>
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<term>Complexing agent</term>
<term>Dcta</term>
<term>Dcta complexes</term>
<term>Dtpa</term>
<term>Durmg</term>
<term>Edta</term>
<term>Hedpha</term>
<term>Hydroxide</term>
<term>Large amounts</term>
<term>Nitric acid</term>
<term>Other metals</term>
<term>Rare earths</term>
<term>Scandium</term>
<term>Slight warming</term>
<term>Sodmm hydroxide</term>
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<term>Thorium</term>
<term>Thormm</term>
<term>Titrated</term>
<term>Titration</term>
<term>Ttha</term>
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<term>Urotropine solution</term>
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<front><div type="abstract" xml:lang="en">Abstract: 1-Hydroxy-ethylidene-1,1-diphosphonic acid (HEDPHA) has been proposed as a highly selective titrimetric reagent for thorium. In the presence of 1,2-diaminocyelohexanetetra-acetic acid (DCTA) a soluble binuclear ternary complex, Th2(DCTA)2(HEDPHA), is formed. The determination of thorium is carried out in a slightly acidic medium, buffered with urotropine, with 0.025M HEDPHA, and Xylenol Orange as indicator. DCTA masks all bivalent metals, rare earths, scandium, yttrium, bismuth, iron, gallium and indium. Only zirconium, titanium, aluminium and large amounts of thallium(III) interfere.</div>
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1-Hydroxy-ethylidene-1,1-diphosphonic acid as a titrimetric agent

1-Hydroxy-ethylidene-1,1-diphosphonic acid as a titrimetric agent

Source :

English descriptors

Abstract

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Links to Exploration step

Le document en format XML

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