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采用硝酸-氢氟酸-高氯酸混合酸分解粉煤灰样品,以电感耦合等离子体-原发射光谱法测定粉煤灰中镓含量。探讨硝酸和氢氟酸的用量,溶解温度及引入盐酸溶样对测定镓含量的影响。该法具有操作简单、灵敏度高、重现性好等优点,回收率为94.45%—105.40%,方法的精密度RSD为3.1%。
Fly ash samples were decomposed with nitric acid - hydrofluoric acid - perchloric acid mixed acid to determine gallium content in fly ash by inductively coupled plasma - atomic emission spectrometry. The effects of the amount of nitric acid and hydrofluoric acid, the dissolution temperature and the sample solution of hydrochloric acid on the determination of gallium content were discussed. The method has the advantages of simple operation, high sensitivity and good reproducibility. The recovery rate is 94.45% -105.40%, and the precision RSD of the method is 3.1%.