原子捕集——火焰原子吸收法测定废水中铅

Determination of Lead in Waste Water by Atom Trapping Flame Atomic Absorption Spectrometry

本文考察了铅在不锈钢原子捕集管表面的捕集和释放条件,在最佳实验条件下,本方法的灵敏度(特征浓度)较常规法提高了114倍,检出限降低了23倍,相对标准偏差为3.78％,此法用于工业污水中痕量铅的测定,结果满意。

The title method is sensitive and practical. The trapping and release of lead on the surface of stainless tube were examined. Using this method the improvement of 114 fold insensitivity(characteristic concentration)was obtained as compared with the conventional AAS, and the improvement of 23 fold in detect limit. The relative standard deviation of the method is 3.78％. The result is satisfactory to apply this method to determine trace lead in waste water of industry.