Here we perform high-temperature and high-pressure digestions:

• Parr pressure vessels,
• Borosilicate glass Carius tubes at 220-250 °C and 320 °C (reverse aqua regia for Re-Os, PGE, Au),
• Quartz glass vessels in high-pressure asher HPA-S up to 320 °C (reverse aqua regia for Re-Os, PGE, Au),
• Glassy carbon vessels in high-pressure asher HPA-S up to 260 °C (HF-HNO₃).