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提出导数原子捕集火焰原子吸收测定粉煤灰中铅的方法。最佳条件下,该方法的特征浓度和检出限(3 min捕集)分别为0.56μg·L-1和1.5μg·L-1,较常规火焰法可分别改善783.9倍和104倍,相对标准偏差(n=10)和回收率分别为1.7％～5.3％和97.3％～104％。对GBW08401和82201标准粉煤灰分析验证和工业粉煤灰样品的分析获得满意结果。
A method for the determination of lead in fly ash by atomic absorption spectrometry with atomic absorption spectrometry was proposed. Under the optimal conditions, the concentration and detection limit (3 min) of the method were 0.56 μg · L-1 and 1.5 μg · L-1, respectively, which were 783.9 and 104 times higher than those of the conventional flame method, respectively The standard deviation (n = 10) and recovery were 1.7% -5.3% and 97.3% -104%, respectively. Satisfactory results were obtained on the analysis of GBW 08401 and 82201 standard fly ash analysis and industrial fly ash samples.