Abstract
A flow injection system for the potassium speciation in fortified wines, using two detectors placed in series, is described. The free, or ionized form, is monitored in a tubular-shaped potassium ion-selective electrode, and the total potassium content in a flame emission spectrometer used as end-of-line detector. Potassium determinations can be carried out in a linear range from 300 to 2000 mg l -1 with a sampling-rate of 60 samples per hour. The results obtained were comparable to the conventional procedures using the same detection systems, and the precision was good (relative standard deviations below 3.1% for free potassium and 3.8% for total potassium).
| Original language | English |
|---|---|
| Pages (from-to) | 887-891 |
| Number of pages | 5 |
| Journal | Analytical Sciences |
| Volume | 12 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 1996 |
Keywords
- Flame emission spectrometry
- Flow injection
- Potassium speciation
- Potentiometry
- Wine