Publications by authors named "X Tong-Ming"
An indirect method for determination of trace phenol in water by atomic-absorption spectrophotometry (AAS) is described. The phenol is brominated in acidic solution with KBrO(3)-KBr solution at room temperature. The excess of bromine is reacted with KI and the I(2) produced is extracted into cyclohexane and then reduced back to I(-) with ascorbic acid.
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- 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.