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. Author manuscript; available in PMC: 2019 Feb 15.
Published in final edited form as: Rev Mineral Geochem. 2016 Jan 1;81(1):107–160. doi: 10.2138/rmg.2016.81.03

Table 3.

An example of sequential acid leaching procedure applied to ~16.5 g of Murchison meteorite in Reisberg et al. (2009).

Step Reactants Time Temp.
Step 1 50 mL 30% CH3COOH + 50 mL H2O 1 day 20 °C
Step 2 25 mL 16 M HNO3 + 50 mL H2O 5 days 20°C
Step 3 30 mL 12 M HCl + 35 mL H2O 1 day 75°C
Step 4 30 mL 30 M HF + 15 mL 12 M HCl + 15 mL H2O 1 day 75°C
Step 5 10 mL 30 M HF + 10 mL 12 M HCl 3 days 150°C
Step 6 2 mL 16 M HNO3 + 2 mL 30 M HF 15 hours 120°C

Step 6 is applied to a fraction of Step 5 residue)