火焰原子吸收光谱法测定污泥中金属元素含量

Determination of eight trace elements in activated sludge by flame atomic Absorption spectrophotometry

用火焰原子吸收光谱法对污泥中Cu，Zn，Ca，Cr，Mg，K，Cd和Pb8种微量元素进行分析测定。结果显示，用硝酸一高氯酸（1：4）混酸作消化液处理样品，消解较完全；污泥中含有较丰富的Ca、Mg、K、Zn和Cu，但也检出了有毒金属Cr、Cd和Ph。方法的检出限均小于0．098μg／mL，RSD≤1．12％，加标回收率为91．2％～98．2％。测定结果为控制、处理和资源化污泥提供了理论依据。

The contents of the copper, zinc, calcium, chromium, magnesium, potassium, cadmium and plum- bum in activated sludge were detected by Flame Atomic Absorption Spectrophotometry. The result was that： nitric acid and perchloric acid（1：4） clear up sample; the detection limit of method was less than 0. 098μg·mL-1 , the re- lative standard deviation （RSD） of the eight contents was less than 1. 12%, and the percentage of recovery was 91.2%～98.2%. It can be used to control, dispose and comprehensively utilize activated sludge.