Abstract
A sodium ion-sensing plate was prepared as an easily-handled ion-sensing optical chemical sensor (optode) probe. The sensing plate consisted of an ion-sensing liquid thin layer containing a Na + -selective neutral ionophore (16-crown-5 derivatives) and a lipophilic anionic dye (KD-A3), which was placed on a chemically modified (octadecyl silanized) frosted glass plate that was covered with a cellulose dialysis membrane. This ion-sensing plate can easily determine Na + ranging from 10 -4 to10 -1 M by simply dipping the plate into the sample solution. The response time was ca. 80 s for 10 -1 M NaCl with good reproducibility (relative standard deviation (RSD)=±1.33% for ten sequential measurements).
Original language | English |
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Pages (from-to) | 127-131 |
Number of pages | 5 |
Journal | analytical sciences |
Volume | 14 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1998 |
Keywords
- Ion-selective optode
- Lipophilic anionic dye
- Neutral ionophore
- Optical sensor
- Sensing plate
ASJC Scopus subject areas
- Analytical Chemistry