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Acryloylmethylbenzo-15-crown-5 was prepared from the reaction of 4?-hydroxymethylbenzo-15-crown-5 with acryloyl chloride. And, poly(acryloylmethylbenzo-15-crown-5) [poly(AMB15C5)] was synthesized by radical polymerization using AIBN as initiator in benzene. Coated wire lead(B) ion-selective electrodes (Pb2+-CWISEs) using either poly(AMBlSC5) or B15C5 as neutral carrier were prepared, respectively. Pb2+-CWISEs gave linear responses with slopes of 28±1mV per decade within the concentration range of 1.0×10-5 M-1.0∼1.0×10-1M, respectively. Also, the detection limits were 10-6 M and response times were either 3 or 5 min. for B15C5 and poly(AMBlSCS), respectively. Pb2+-CWISE base on B15C5 was rather unstable than poly(AMB15C5)'s due to solubility of the B15C5 in water. The selectivity coefficients of a variety of interfering ions such as Mg2+, Ca2+, Co2+, Ni2+, CU2+, Zn2+ and Cd2+ were small (10-4∼10-5), while those of Na+ and K+ were large (0.1∼0.01). In addition, the electrode responses depended upon the pH of test solution and the composition of the membrane. In the range pH 3∼6 of test solution, potentials of Pb2+-CWISEs were hardly changed. The optimal contents of B15C5 and poly(AMB15C5) were 7.7wt% and 13.1wt%, respectively.
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