基于Co2+对固定于聚氯乙烯(PVC)膜中的四甲氧基硫杂杯[4]芳烃具有可逆的荧光猝灭效应,研制了测定Co2+浓度的光化学敏感膜.该敏感膜的最佳化学组成为:50 mg PVC粉、100 mg癸二酸二辛酯和2.5 mg四甲氧基硫杂杯[4]芳烃.在pH =5.6的硝酸溶液中测定Co2+,其线性响应范围为6.31×10-6～1.26×10-2 mol/L,检出限为3.11×10-7 mol/L.该敏感膜具有较好的重现性、可逆性及选择性,其它常见阴离子和阳离子对其不产生干扰.
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