石墨炉原子吸收法测定空气滤纸中金属元素

Determination of the Metal Elements in Air Filter by Graphite Furnace Atomic Absorption Spectrometry

目的：探讨一种检测空气滤纸中金属元素浓度的方法。方法：用微波消解法消解已知相关金属浓度的标准空气滤纸,用石墨炉原子吸收法测定标准空气滤纸中铅、镉、铬、锰等元素的浓度。结果：所选实验条件下,铅、镉、铬、锰的线性范围、检出限、精密度相对标准偏差和回收率分别为0-90、0-5、0-80、0-40μg/L;1.237、0.210、0.805、0.239μg/L;4.926%、4.774%、1.416%、6.451%;107.7%、94.5%、129.8%、103.7%。用该法测标准空气滤纸各元素的测定值和理论值很接近,相对误差均在允许范围之内。结论：该法简便快速、结果准确可靠,适于大规模空气滤纸样品金属浓度的检测。

Objective：To find a method for determining metal element content in standard filter by graphite furnace atomic absorption spectrometry（GFAAS）.Methods：Standard filters which were known related metal content were diges-ted by microwave,and GFAAS was used to determine lead,cadmium,chromium and manganese in standard filter.Results：Under this condition,the linear range,detecting limit,relative standard deviation of precision and recovery rate of lead,cadmium,chromium and manganese were 0 ~ 90、0 ~ 5、0 ~ 80、0 ~ 40 μg/L,1.237、0.210、0.805、0.239 μg/L,4.926%、4.774%、1.416%、6.451%,107.7%、94.5%、129.8%、103.7%,respectively.Conclusion：This method is simple and rapid,accurate and reliable,and is suitable for large scale air sample heavy metal content detection.