AI Article Synopsis
- An indirect method is outlined to measure trace amounts of cyanide in water using atomic-absorption spectrophotometry, where cyanide forms a stable complex with palladium in alkaline solutions.
- This complex can bond with tetra-alkylammonium ions and be efficiently extracted into n-butyl alcohol, allowing for direct analysis of palladium, which indicates the presence of cyanide.
- The method has a detection limit of 0.1 mug/ml for cyanide and adheres to Beer's law for concentrations between 0.13-9 mug of CN(-) per ml, with minimal interference from other foreign ions.
Article Abstract
An indirect method for determination of trace cyanide in water by atomic-absorption spectrophotometry is described. Cyanide forms a stable complex anion with Pd in alkaline solution. This complex anion can form an ion-association complex with tetra-alkylammonium ions which can be extracted into n-butyl alcohol with an efficiency higher than 90%. The extract can be analysed directly for palladium (and hence indirectly for cyanide) by flame atomic-absorption spectrophotometry. The detection limit for cyanide by this method is 0.1 mug ml in the n-butyl alcohol extract. Beer's law is obeyed for 0.13-9 mug of CN(-) per ml of n-butyl alcohol. Several foreign ions do not interfere.
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| http://dx.doi.org/10.1016/0039-9140(84)80034-x | DOI Listing |
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