Informace o publikaci
Ultra-trace mercury determination in drinking water by APGD-OES with cold vapor generation and gold trap enrichment
| Autoři | |
|---|---|
| Rok publikování | 2027 |
| Druh | Recenzovaný odborný článek |
| Časopis / Zdroj | Talanta |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://www.sciencedirect.com/science/article/pii/S0039914026011628 |
| Doi | https://doi.org/10.1016/j.talanta.2026.130506 |
| Klíčová slova | Water analysis; Atmospheric pressure glow discharge; Optical emission spectrometry; Gold amalgamation; Mercury preconcentration |
| Přiložené soubory | |
| Popis | An atmospheric pressure glow discharge (APGD) optical emission spectrometry (OES) method for ultra-trace Hg determination in water was developed by combining cold vapor (CV) generation with a custom-built gold trap (GT). Among the two high-voltage power supplies evaluated (pulsed DC and constant DC), the constant DC-driven microplasma yielded superior Hg excitation. Under optimized conditions, limits of detection (LODs) for Hg in CV-APGD-OES were 0.2 and 0.08 µg L-1 for 1 s and 10 s integration times, respectively. Coupling with the GT unit improved sensitivity by over 100-fold, yielding an LOD of 0.003 µg L-1, well below regulatory limits for drinking water. Time-resolved signal measurements (intensity of the Hg I 253.7 nm line) were fitted to an exponentially modified Gaussian function (EMG), enabling repeatabilities of 4.2% and 2.2% at concentration levels of 0.25 and 5 µg L-1, respectively. The method was validated using spiked water samples (sub-µg L-1 levels), with recoveries of 98–108%. Compared to conventional, bulky systems, the proposed approach offers reduced costs, simplified instrumentation, and lower maintenance requirements. |
| Související projekty: |