ALKALINE EARTH IONS;
LIPOPHILIC DIAMIDES;
ION SELECTIVE ELECTRODES;
POTENTIOMETRY;
DIAMIDES;
D O I:
10.1002/elan.1140050911
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
Based on complex chemical considerations, lipophilic diamide derivatives have been designed and synthesized as ionophores for liquid membrane electrodes. The structure-selectivity studies revealed that the majority of the ligands exhibit calcium ion selectivity except the compound bis-N,N-dicyclohexyl-malonamide. The latter has an almost equal selectivity for Ca2+ and Mg2+ and sufficiently rejects sodium ions, thus it lends itself to water hardness measurements.
机构:
St Petersburg State Inst Technol, Dept Analyt Chem, St Petersburg 1900013, RussiaSt Petersburg State Inst Technol, Dept Analyt Chem, St Petersburg 1900013, Russia