Powder sample | Oxygen content (wt%) | |||
Before grinding | After grinding in | |||
<150 μm | 2-propanol | n-hexane | acetonitrile | |
No. 3 (low purity) | 1.40 | 2.51 | 2.53 | 2.6 |
No. 4 (high purity) | 0.59 | 1.70 | 1.39 | 1.77 |