稀硫酸吸收法采集碱雾(钠碱)的可行性探讨

用稀硫酸吸收法采集某铝型材生产厂无组织排放的碱雾,吸收液浓度0.01 mol/L,采样后用火焰原子吸收光度法测定样品中钠的浓度,测定结果的精密度和准确性均较好。与玻璃纤维滤膜法进行比对实验,二者测定结果的相对偏差符合质控要求,测定结果无显著性差异,且稀硫酸吸收法采样操作相对比较简单,还可省略滤膜法繁琐的前处理工序,可以替代玻璃纤维滤膜法。

With the dilute sulfuric acid absorption method capturing the alkali mist of fugitive emissions from an alu-minum production factory, at the concentration of absorption solution 0.01mol/L, sodium concentration in the sample was measured by flame atomic absorption spectrophotometric determination, and the data shows both the accuracy and the precision better. Compared to the glass fiber filter method, measurement results were both in line with the relative deviation of quality control requirements, and there were no significant differences between them. Also, sampling operation of the dilute sulfuric acid absorption method is relatively simple, which can be omitted first filter method cumbersome treatment processes, can replace the glass fiber filter method.