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本文研究了石墨炉原子吸收光谱法测定水处理剂聚合氯化铝中铅、镉含量的适宜条件。用氘灯校正背景 ,磷酸二氢铵做基体改进剂 ,省去了冗长的前处理过程。在测定条件下 ,铅的检测限为 0 .6 5μg· L- 1 ,线性范围 0～ 5 0 μg·L- 1 ;镉的检测限为 0 .12 μg· L- 1 ,线性范围 0～ 2 0 μg·L- 1 ;回收率在 90 %～ 110 %之间。本方法具有准确、快速、简便之优点 ,用于实验样品的测定 ,结果令人满意。
In this paper, graphite furnace atomic absorption spectrometry (FAAS) was applied to determine the content of lead and cadmium in water treatment agent PAC. Deuterium lamp calibration background, ammonium dihydrogen phosphate matrix improver, eliminating the need for lengthy pre-treatment process. Under the conditions of determination, the detection limit of lead was 0.6μg · L -1, the linear range was 0 ~ 50 μg · L -1, the detection limit of cadmium was 0.12 μg · L -1 and the linear range was 0 ~ 2 0 μg · L -1; recovery was between 90% and 110%. The method has the advantages of accuracy, quickness and simplicity for the determination of experimental samples with satisfactory results.