We have an isolated dust-proof glaw-box for for "clean" analysis procedures: sample concentration, sampling itself, and plastic-glassware steam cleaning/ storage. It is known that some elements e.g. Hg are vulnerable even at room temperature and may contaminate samples in some cases. But what about other elements? Are there any publications that e.g. boiling is unsafe, but slow warming is ok, and for which elements and analysis types? Thank you