Extraction of bismuth as iodide with isoamyl acetate and isoamyl alcohol

✍ Scribed by H.A. Mottola; E.B. Sandell

• Book ID: 102623750
• Publisher: Elsevier Science
• Year: 1961
• Tongue: English
• Weight: 478 KB
• Volume: 24
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(61)80060-3

✦ Synopsis

The separation of traces of bismuth from most elements can often be carried out advantageously by dithizone extraction from basic medium, in the presence of cyanide if need be, to complex otherwise reacting heavy metals escept lead, thallium and in&urn. This method is likely to be inapplicable in the presence of much calcium (or magnesium) and phosphate which will give a precipitate in basic medium even in the presence of citrate. We have therefore studied the extraction of bismuth as the iodide or iodobismuthous acid from strongly acid solution as a means of isolating bismuth from such samples. In some respects this estraction method is more convenient than isolation of bismuth by hydrogen sulfide precipitation and moreover is more selective.

Cupferron -chloroform and dietbylammonium diethyldithiocarbamate-chloroform estraction are other possible methods for the isolation of bismuth from acid medium; although a number of metals are extracted under the same conditions as bismuth, these methods may be superior to the iodide estraction for some types of samples.