Experimental Research on the Determination of Potassium Content in Waste Liquor of Rum by Potassium Tetraphenylborate Weighting Method

QIAO Feng-mei et al(College of Environmental Science and Engineering,Guilin University of Technology,Guilin,Guangxi 541004)

Potassium tetraphenylborate weighting method;Waste liquor of rum;Potassium content

[Objective] The aim was to establish an easy,convenient and feasible method for potassium content determination in waste liquor of rum.[Method] The potassium content in waste liquor of rum was determined by potassium tetraphenylborate weighting method and the effect of filtering equipments,pretreatment methods of water sample and formaldehyde on determination results was investigated and the determination results were compared with that of flame atomic absorption spectrophotometry.[Result] The effect of filtering equipments,pretreatment methods of water sample and formaldehyde on determination results of potassium content was little.The average recovery of sample addition of potassium tetraphenylborate weighting method was 99.80% and its determination results did not have significant difference from that of flame atomic absorption spectrophotometry.[Conclusion] Potassium tetraphenylborate weighting method was easy to operate,low energy consumption,non-toxic and harmless and had good reproducibility and high accuracy.It was consistent with requirement of intermedial control of production and product check-up and could be used to determine the potassium content in waste liquor of rum.