0.5 M EDTA (pH 8.0)
1 Dissolve 186.1g Na2EDTA.2H2O in 800 ml distilled.
2 pH to 8.0 with NaOH (~20g of NaOH pellets). EDTA will dissolve at pH 8.0.
3 Adjust volume to 1 liter with distilled water.
4 Sterilize by autoclaving and store at room temperature.