论文部分内容阅读
研制了基于N,N-双(2-水杨醛缩氨基苯基)1,3-丙二酸二酰胺合铜(Ⅱ)[Cu(Ⅱ)-BSAPM]为中性载体的阴离子选择性电极.实验表明,以[Cu(Ⅱ)-BSAPM]为中性载体的电极对硫氰酸根(SCN-)具有良好的电位响应特性,且呈现反Hofmeister行为,其选择性序列从大到小为:SCN-,Sal-,I-,ClO4-,NO3-,Br-,NO2-,Cl-,SO32-,SO42-.在pH=4.0的磷酸盐缓冲体系中,电极电位呈现近能斯特响应,线性响应范围为1.0×10-6~1.0×10-1mol/L,斜率为-55.9 mV/dec(25℃),检测下限为8.0×10-7mol/L.采用交流阻抗技术及紫外可见光谱技术研究了电极的响应机理,并将该电极用于实验室废水中SCN-检测,其结果令人满意.
Anion-selective electrode based on N, N-bis (2-salicylaldehyde aminophenyl) 1,3-propanedioic acid bisamide copper (Ⅱ) [Cu (Ⅱ) -BSAPM] Experiments show that the electrode with [Cu (Ⅱ) -BSAPM] as neutral carrier has good potential response to thiocyanate (SCN-) and exhibits anti-Hofmeister behavior with the selectivity sequence descending: SCN-, Sal-, I-, ClO4-, NO3-, Br-, NO2-, Cl-, SO32-, SO42-. In pH = 4.0 phosphate buffer system, The linear response range was 1.0 × 10-6 ~ 1.0 × 10-1mol / L, the slope was -55.9 mV / dec at 25 ℃, and the detection limit was 8.0 × 10-7mol / L. The AC impedance technique and UV-Vis spectroscopy The response mechanism of the electrode was studied, and the electrode was used for SCN-detection in laboratory wastewater. The result was satisfactory.