塑料好消解吗？应注意什么？

EN1122 is good total digestion for general plastics,but it only suits some kind of heavy metals, such as Cd. For Pb, because it can create PbSO4, the result may be very low.If you choose EN1122 to test Pb, you should find a way to dissolve PbSO4.
You can try all kind of testing methods. Such as EPA 3051/3052. Somebody is very interested in microwave. But frankly to say, for we only weigh about 0.2g sample, it's difficult to know if it is total digested.
Sometimes it's good way to use acid combination.
It's impossible to find one way to solve all things. Every method has its limit.You should do more research work on it.
Good luck.