Rauret G, Rubio R, Llauradó M
Int J Environ Anal Chem. 1985;23(1-2):59-68. doi: 10.1080/03067318508076434.
The destruction of the filter for metal determination in atmospheric aerosols is an important step in the analysis. Nowadays the decomposition of this kind of sample has not been completely solved, so it is interesting to study new methods for filter sample attack. In the present work the application of the combustion method in a closed flask for mixed cellulose esters filter decomposition for lead determination is proposed. For this purpose optimum operating conditions as stopper flask design, sample size, flask volume, shaking time and volume and concentration of absorbing solution are established, and accuracy and precision of the proposed method using AAS for the measurements is given. The results obtained by the closed flask combustion are compared with those found by wet attack with HNO3. The method proposed is rapid, has low reagent contamination and no loss of lead by volatilization or by amalgamation occurs. This method shows an accuracy and a precision in good agreement with the standard method.
大气气溶胶中金属测定用滤膜的消解是分析过程中的重要步骤。目前，这类样品的分解问题尚未完全解决，因此研究滤膜样品消解的新方法很有意义。本文提出了在密闭烧瓶中采用燃烧法对混合纤维素酯滤膜进行消解以测定铅的方法。为此，确定了最佳操作条件，如带塞烧瓶的设计、样品量、烧瓶体积、振荡时间以及吸收溶液的体积和浓度，并给出了采用原子吸收光谱法（AAS）进行测量的该方法的准确度和精密度。将密闭烧瓶燃烧法得到的结果与用硝酸湿法消解得到的结果进行了比较。所提出的方法快速，试剂污染低，不会因挥发或汞齐化导致铅损失。该方法的准确度和精密度与标准方法高度一致。
