本工作旨在测量我院某单位废水中微量Be的含量。Be是有毒有害元素,会对环境造成污染,为使废水在被排放时不污染环境,Be的含量必须准确测定。 该废水里含有大量Bi,它会干扰Be的测定。采用沉淀法可将Bi和Be分离。具体过程为:用1mol/L NaOH溶液将样品调至pH=13,Bi形成沉淀,离心后,Bi基体被分离去除。实验证明:Be在此条件下无损失。取一定量上清液,加10％ EDTA掩蔽残留的Bi及其它杂质,然 The purpose of this work is to measure the content of trace Be in a unit of our hospital wastewater. Be is a poisonous and harmful element that can pollute the environment. To ensure that the wastewater does not pollute the environment when it is discharged, the content of Be must be accurately determined. The wastewater contains a large amount of Bi, which can interfere with the determination of Be. Bi and Be can be separated by precipitation method. The specific process is as follows: the sample is adjusted to pH = 13 with 1 mol / L NaOH solution, Bi forms a precipitate, and after centrifugation, the Bi matrix is ​​separated and removed. Experiments show that: Be in this condition without loss. Take a certain amount of supernatant, plus 10% EDTA to mask residual Bi and other impurities, however