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| Determination of copper content in zinc ash by flame atomic absorption apectrop hotometry |
| Xu Huanyu, Niu Jiaru, Feng Manyu, Wang Xuan, Ci Lijie |
| Shijiazhuang University, Chemical Engineering and Technology, Shijiazhuang 050035, China |
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Abstract Zinc ash is the industrial waste of hot-dip galvanizing plant and electrolytic zinc plant, which mainly contains Zn, Fe, Mn, Cu, Pb. The concentration of trace copper in zinc ash was investigated. The content of copper in zinc ash was determined by flame atomic absorption spectrophotometry and dicyclohexanone oxaloacetate spectrophotometry. The standard curve of copper was measured. The copper content in zinc ash was determined according to the standard curve, and was compared with the content data that measured by flame atomic absorption spectrometry. The optimum temperature and the optimum dosage of reagent used for the determination of copper content by dicyclohexanone oxalyl dirazone spectrophotometry were investigated. The reagents were as follows: masking agent citric acid and chromogenic agent dicyclohexanone oxaloacetate.
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