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以对叔丁基苯酚和甲醛为原料,通过缩合反应制备对叔丁基杯[4]芳烃(H4L),并利用红外光谱对其进行表征。将制备的对叔丁基杯[4]芳烃修饰在碳糊电极上得到了用于检测铜离子的电化学传感器,通过循环伏安法研究了铜离子在该修饰电极上的电化学特性。在0.1 mol/L的氨性缓冲溶液(p H=10.66)中,铜离子在该修饰电极上于-0.167 V处产生1个灵敏的阳极溶出峰,铜离子在该电极上的阳极溶出峰电流与其浓度在1.0×10~(-7)~2.5×10~(-4)mol/L范围内呈线性关系,线性相关系数为0.996 7,检出限为1.33×10~(-8)mol/L。通过国家标准方法检测实际水样,未检测到铜离子。配制3个不同浓度的模拟水样进行加标回收实验,结果令人满意。
P-tert-Butylcalix [4] arene (H4L) was prepared by condensation reaction using p-tert-butylphenol and formaldehyde as raw materials, and characterized by IR. Electrochemical sensors for the detection of copper ions were prepared by modifying p-tert-butyl calix [4] arene modified at carbon paste electrode. The electrochemical properties of copper ions on the modified electrode were studied by cyclic voltammetry. In 0.1 mol / L ammoniacal buffer solution (p H = 10.66), copper ions produced a sensitive anodic stripping peak at -0.167 V on the modified electrode. The anodic stripping peak current of copper ion at the electrode The linear correlation coefficient was 0.996 7 with the concentration range of 1.0 × 10 -7 -7.5 × 10 -4 mol / L with a detection limit of 1.33 × 10 -8 mol / L. The actual water samples were tested by the national standard method and no copper ions were detected. Preparation of three different concentrations of simulated water samples for spike recovery experiments, the results are satisfactory.