Product codeB020 Bis(benzo-15-crown-5)
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Bis(benzo-15-crown-5) is a potassium selective ionophore. Its potassium ion selectivity is almost equal to that of valinomycin, which is a well known neutral carrier for the potassium ion in nature. This reagent, combined with NPOE as a plasticizer, is the most recommended ionophore for potassium-selective PVC membrane electrodes. This ionophore also forms a thallium complex, so it can be used for thallium sensors.
Ion selectivity: LogKt(K/Na):-3.6, LogKpot(K/Rb):-0.7, LogKpot(K/NH4):-2.0, LogKpot(K/Cs):-2.0
Formulation: Ionophore: 2.7%, NPOE: 70%, TFPB: 50 mol% of ionophore/PVC, THF
1. H. Tamura, K. Kimura and T. Shono, "Thallium(I)-selective PVC Membrane Electrodes Based on Bis(crown ether)s", J. Electroanal. Chem., 1980, 115, 115.
2. H. Tsukube, K. Takagi, T. Higashiyama, T. Iwachido and N. Hayama, "Biomimetic Application of Natural Valinomycin and Nonactine Ionophores to Artificial Transport of Amino Acid Salts", Bull. Chem. Soc. Jpn., 1986, 59, 2021.
3. Y. Yamashoji, M. Tanaka, S. Nagamune, M. Ouchi, T. Hakushi and T. Shono, "Polymer Membrane Thallium(I)-selective Electrodes Based on Dibenzo-crown-6 Ethers", Anal. Sci., 1991, 7, 485.
Handling and storage condition
|Purity (HPLC)：||≧ 98.0 %|
|Solubility in Tetrahydrofuran：||To pass test (clear, colorless or almost colorless)|