【摘要】 本文应用溶剂浮选吸光光度原理,拟定了微量铜的测定方法。用二乙基二硫代氨基甲酸钠作捕收剂,与Cu²⁺离子生成稳定疏水的螯合物沉淀,当空气通过浮选池时,沉淀附着于气泡上升,并溶于有机相异戊醇中,于430nm比色测定,可测定ppb级铜,富集比为20,浮选率约98％。更多还原

【Abstract】 Solvent sublation was used here to concentrate trace Cu using diethyldithioocarbamate（DDTC）as a collector instead of solvent extraction. At pH 4 to 10 a yellow complex conpound of Cu²⁺ with DDTC was formed It could be flotested, its absorbance was measured subsequently at 430 nm. The main factorsaffecting the determination was determined thogonalexperiment.pHwascontrolled at 6. 0 to 6. 4: The mixture of Cu²⁺and DDTC was stirred for 5 min, and isoamyl alcohol was used as solvent in solvent flotation with air flowrate of 25 ml/min, the determination would then be carried out. The interferences from Fe³⁺, Mn²⁺, Ni²⁺ and Cr³⁺ etc within ertainlimitswerepreventedby masking with tartrate ion and EDTA.更多还原