| Summary: | 碩士 === 國立中興大學 === 化學系 === 93 === Cyanide compounds used as poison or as disinfectant for orange and antique furniture were seriously toxic. At present they are widely used in the industrial processes such as metallurgy, chemical synthesis and metal plating. If cyanide compounds are in the acid environment, they will have potential danger and lead to serious injury human health or even fatal death. Therefore, it is much needed to develop a more efficient method for reducing menace of cyanide compounds.
The analytical methods reported still requires complex pretreatment, time taking and number of reagents to overcome matrix interferences. The purpose of the present study is to develop a technique for the determination of cyanide in water sample by using headspace sampling on hollow fiber and in situ derivatization by microdialysis which had low matrix interferences, low detection limit, simple and fast analytical method and could also be used for evaluation of cyanide compounds in wastewater. According to the available literatures, picric acid was used as derivative reagent and formed a stable and high sensitive complex at high temperature. In the present method, reaction proceeded at 66℃ and five microliter of derivative solution was injected for HPLC analysis, where acetonitrile : water (30:70) used as mobile phase and detected at 510 nm. The characteristic of this research that requires simple equipment for pretreatment, highly sensitive, the picric acid and its derivatives are separated within 10 min in the HPLC analysis. This technique is effectively applied for the determination of industrial wastewater. Besides, the proposed technique not only can be employed against simple condition but also has high potential to on-line analysis.
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