Pyrazole-containing crown ethers as ionophores for NH4+-selective electrodes

Authors
Moriuchi-Kawakami, T Nakazawa, S Ota, M Nishihira, M Hayashi, H Shibutani, Y Shono, T
Citation
T. Moriuchi-kawakami et al., Pyrazole-containing crown ethers as ionophores for NH4+-selective electrodes, ANAL SCI, 14(6), 1998, pp. 1065-1068
Citations number
16
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYTICAL SCIENCES
ISSN journal
09106340 → ACNP
Volume
14
Issue
6
Year of publication
1998
Pages
1065 - 1068
Database
ISI
SICI code
0910-6340(199812)14:6<1065:PCEAIF>2.0.ZU;2-E
Abstract
The pyrazole-containing 18-membered crown ether 1, which possesses a less-b ulky substituent on the sp(3) nitrogens and not only the sp(2) nitrogen, bu t also the carbonyl groups as ligating points, exhibited excellent ability as an ionophore for a NH4+-selective electrode. The value of the selectivit y coefficient of an ion-selective electrode (ISE) containing 1 for the NH4 ion with respect to an interfering K+ ion was 6.3x10(-2). This result is s uperior to that of LSE based on an antibiotic substance, nonactin(1.2x10(-1 )).