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From 2010.igem.org

TFA treatment

- Make sure samples a completely dried out. Add 1ml 99% extra pure TFA per max 50 mg of sample. 
- Then vortex TFA with sample for 1 min
- Then spin down at 14000 rpm for 2 min
- Transfer supernatant to clean tube and blow off acid (2-6 hour) till no acid is remaining the sample.