The chromatographic analysis of organic peroxides

✍ Scribed by M.H. Abraham; A.G. Davies; D.R. Llewellyn; E.M. Thain

• Publisher: Elsevier Science
• Year: 1957
• Tongue: English
• Weight: 391 KB
• Volume: 17
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)87075-0

✦ Synopsis

Procedures are described for the analysis of bismuth base alloys contammg uranmm and thonum m the range from o I to 10% The thorrum IS first separated by the passage of a solution of the sample in 5M hydrochloric acid through a column of Deacldltc FF m the chloride form For thorium contents greater than about I%, the dctermmatlon IS completed volumetncally wltlr EDTA using pyrocatechol violet as the Indicator Smaller amounts arc determined absorptlometrlcally by the thoronol method Uranium IS recovered from the ion-exchange column m a quantity of o zA2 hydrochlorlc acid, blsmuth St111 bemg retained by the column under thcsc condltlons Uranium contents greater than about I?:, arc dctcrmmed volumctrlcally after reduction to the tetravalent state with a lead reductor, whilst smaller amounts arc determined polarographlcally using a tartrate base solution RI?SUMl? On dCcrtt des pro&d& d'analyse d'alhagcs &base dc bismuth contenant do l'uranlum et du thorium dans lcs proportions de o I B 10%. Le thorium est s&par6 d'abord par le passage d'une solution chlorhydrlquc j&Z de 1'8chantlllon & travcrs unc colonnc de, ,Deacldltc FF" sous formc de chlorure Pour des quan,tlt& do thorium depassant x0/", la ddtcrmmatron cst compl6tdc volum8triqucment par du EDT:, at on utlhsant lc pyrocatCcho1 vlolct commc mdlcatcur I-es quantlt6s plus farbles sont d&ermmCcs par absorption par la mdthodc au thoronol L'uramum est rdcupdr6 dc la colonne ,,t?changeur d'lons" dans l'aclde chlorhydrlquc o zlcf , le bismuth clans ccs condltlons est rctcnu par la dlte colonnc Lcs quantltbs d'uramum, sup&r:curcs h x"AB sont d&crmmCcs volumdtriqucmcnt aprbs rdductlon & 1'Ctat tdtravalcnt avcc un rdductcur au plomb, tandls quc les plus falbles quantltds sont d&ermmdes polarographlqucmcnt en utlhsant une solution de tartrate ZUSAMMENFASSUNG