Sodium ion-selective membrane electrode based on a new crown ether |
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| Authors: | Xingyao Zhou Yong Luo Chengtai Wu Zhenfu Zou Qizh Hu |
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| Institution: | Department of Chemistry, Wuhan University, Wuhan China |
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| Abstract: | A sodium ion-selective PVC membrane electrode based on di(o-methoxy)stilbenzo-24-crown-8 is reported. The electrode gives a near-Nernstian response in the range 9×10?6–1×10?2 M sodium ion and can be used in the pH range 5–8.5. Selectivity coefficients are 1.8×10?1 (K+), 2.0×10?4 (Li+) 2.5×10?2 (NH+4) and about 10?4 for Mg2+, Ca2+ and Ba2+. |
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