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A liquid-quench-based experimental method for the determination of even minimal vanadium and tungsten emissions from selective catalytic reduction (SCR) catalysts by an inductively coupled plasma optical emission spectrometer (ICP-OES) was developed. The method was applied to a commercial EuroV SCR catalyst (V 2 O 5 /WO 3-TiO 2) with usual operation temperatures below 450°C, which was on purpose operated at out-of-spec temperatures above 550°C in the laboratory. It was observed that the emissions of vanadium exponentially increase with temperature but the absolute concentrations if calculated to gas phase are very small and still below legal limits of health organizations such as NIOSH. Further, it could be shown that with heating of the same catalyst sample up to 100 h, the emissions increase before reaching a stable level that could be up to four times higher than the emission level in the first 24 h. However, the catalyst was already heavily thermally damaged due to a loss of BET surface of over 50 % compared to the fresh catalyst.

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