Open AccessEtude polarographique de l'antimoine(III) et (V) dans le fluorure d'hydrogène anhydre et dans ses mélanges avec l'eau
Author(s) -
Jacques Devynck,
B. Trémillon,
Hugues Ménard,
Germain Comarmond
Publication year - 1978
Publication title -
canadian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.323
H-Index - 68
eISSN - 1480-3291
pISSN - 0008-4042
DOI - 10.1139/v78-115
Subject(s) - chemistry , polarography , anhydrous , electrochemistry , dropping mercury electrode , analytical chemistry (journal) , electrode , inorganic chemistry , organic chemistry
The electrochemical behaviour of Sb(III) and Sb(V) in water–HF mixtures (2.5 to 50% HF) and in anhydrous HF is described. A Teflon capillary dropping mercury electrode is proposed for polarographie investigations in these fluorinated media. It is shown, by classical or puise polarography, that Sb(III) can be reduced to Sb(0), as in acidic non-fluorinated media. The electrochemical reaction becomes reversible by addition of Cl − , Br − or I − . Sb(V) is not electroactive in the various HF-media, except when it is introduced as the SbCl 5 . In this case, the two polarographie waves of Sb(V) disappear with time because of SbF 6 − formation. Analytical applications to the determination of Sb(III) in water–HF and in anhydrous HF are discussed.