Abstract
The potentiometric response characteristics of electrodes based on organic trialkyl/aryl-tin compounds combined with various amounts of anionic additive (NaTFPB) were investigated in 0.1M bis-Tris-H2SO4 buffer solution at pH 7.0. The best result for phosphate sensing was obtained for the electrode membrane containing tributyltin chloride and 25mol% NaTFPB, where the electrode exhibits high selectivity towards phosphate anions with a slope of -60mV per decade. It was demonstrated that the interference from more lipophilic anions is drastically suppressed (logKij pot, i=H 2PO4 -: salicylate, 0.5; SCN-, -0.8; ClO4 -, -2.3) under this optimized measurement conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 131-134 |
| Number of pages | 4 |
| Journal | Talanta |
| Volume | 63 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2004 May 10 |
Keywords
- Ion-selective electrode
- Organic tin
- Phosphate
- Sensor
ASJC Scopus subject areas
- Analytical Chemistry
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