【求助】有机催化反应后，要测定催化剂的流失，如何处理样品？

下面是我自己列的针对第二个问题的一个初步处理过程，大家看看，是否有问题？
1.Porphyrize the Pd/AC.
2.Dry at 105 oC for one hour.
3.Weigh 0.1-0.5 g (accurate to 0.0001 g) to 100 ml conical flask.
4.Add 20 ml concentrated nitric acid , heat to near no solution. Add 5% HNO3（加多少？）.
5.Transfer to 50 ml volumetric flask for constant volume.
6.After standing, get the upper transparent solution for ICP analysis.

如果催化剂里面只有钯和活性炭就很好测，有其他杂质就要分析下了。
重量法可以考虑么？

建议是
4.Add 20 ml concentrated nitric acid , heat to near no solution. Use
5% HNO3 10mL to elute the flask with 3 times.

thank you very much!!