Indirect ultraviolet spectrophotometric determination of borohydride using acetone

✍ Scribed by Ivan E. Lichtenstein; John S. Mras

• Publisher: Elsevier Science
• Year: 1966
• Tongue: English
• Weight: 288 KB
• Volume: 281
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(66)90435-2

✦ Synopsis

The rapid, quantitative reaction of borohydride ion with acetone in aqueous solution is utilized to determine borohydride via an indirect spectrophotometric method. The absorbance of such a solution at ~65m~ is compared to that of a reagent blank from which the borohydride is omitted. The amount of acetone used up in the reaction with boro hydride is thus calculated and, from the stoichiometry of this reaction, the amount of borohydride initially present is determined. The method is applicable to the commercially available alkali metal and tetraalkylammonium borohydrides. Interference from active hydride impurities can be avoided.