8-Quinolinol-5-sulfonic acid as a non-selective post-column reagent for fluorimetric detection of trace metals in ion chromatography
✍ Scribed by Tim Williams; Neil W. Barnett
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 339 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
A method IS presented for the determmation of a vanety of trace metals, many of which do not form fluorescent species Hrlth S-qumohnol-5-sulfons acid (8-HQS) The analytes are separated from each other and other elutmg species, m most cases, by usmg aqueous lactic acid eluents m con]unctlon with a low-capacity, strong catlon-exchange, stationary phase After separation the analyte ions react Hrlth Mg-EDTA to displace free magnesium ions which m turn react with 8-HQS to produce the fluorescent species [Atem) = 390 nm, A(,,) = 510 nm] Calibration graphs were linear for at least two orders of magnitude for all analytes with detection hmlts ranging from 3 3 X lo-' to 14 X 10m6 M