Abstract
A method for the simultaneous determination of chromium(iii) and chromium(vi) in a flow system based on chemiluminescence was developed. A Dionex cation-exchange guard column was used to separate chromium(iii) from chromium(vi), and chromium(vi) was reduced by potassium sulfite, whereupon both species were detected by use of the luminol-hydrogen peroxide chemiluminescence system. Linear calibration for both species was established over the concentration range 1-1000 micrograms l-1. The precision at the 20 micrograms l-1 level was 3.5% for chromium(iii) and 3.3% for chromium(vi), respectively. The detection limit was 0.5 micrograms l-1 for both species. Data were in agreement with Zeeman-effect background corrected atomic absorption spectrometry measurements.
| Original language | English |
|---|---|
| Journal | Analyst |
| Volume | 117 |
| Issue number | 3 |
| Pages (from-to) | 637-40 |
| Number of pages | 4 |
| ISSN | 0003-2654 |
| Publication status | Published - 1992 |
Keywords
- Chromatography, High Pressure Liquid
- Chromium
- Luminescence
- Solutions
- Trace Elements
- Water