Abstract：The waste denitration catalyst sample was treated by microwave digestion in tartaric acid-hydrofluoric acid-nitric acid system. The content of tungsten and titanium was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The determination method of tungsten and titanium in waste denitration catalyst by ICP-AES was established after microwave digestion. The digestion system and the dosage were investigated to optimize the microwave digestion procedures. The results showed that the mass concentration of tungsten and titanium in range of 0.05-5mg/L and 0.01-10mg/L was linear to the corresponding emission intensity, respectively. The correlation coefficient was 0.9995 and 0.9998, and the detection limit was 0.002% and 0.0002%, respectively. The coexisting elements in waste denitration catalyst including iron, aluminum, calcium, magnesium, vanadium and molybdenum had no influence on the determination of tungsten and titanium. The proposed method was applied to the determination of tungsten and titanium in waste denitration catalyst sample. The relative standard deviations (RSD, n=6) were less than 3%. The found results were consistent with those obtained by atomic absorption spectrometry (AAS).
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