Recipe for Sodium salts used to calibrate TOF

For Sodium formate:
10ml Water

10ml Isopropanol

40ul Formic Acid

200ul NaOH (1 molar)

All solvents must be of highest quality.

For sodium acetate:

10ml Water

10ml Isopropanol

11ul Acetic Acid

200ul NaOH (1 molar)

Preparation of a 10 mM sodium TFA calibrant solution:
12.5 mL H2O
12.5 mL isopropyl alcohol (ACN can also be used)
50 µL TFA acid (conc.)
250 µL 1 M NaOH

* I find NaOH is not always available. NaHCO3 (baking soda) 

21mg NaHCO3=250uL 1M NaOH

17mg NaHCO3=200uL 1M NaOH