Preparation of Glyoxal Standard Solution
Glyoxal Standard Solution (20 ppm C2H2O2):
In a 100 mL graduated flask weigh a quantity of 40% w/w of glyoxal solution corresponding to 0.200 g of C2H2O2 and make up to volume with anhydrous ethanol. Immediately before use dilute the solution to 100 times its volume with the same solvent.
Glyoxal Standard Solution (2 ppm C2H2O2):
Immediately before use, dilute glyoxal standard solution (20 ppm C2H2O2) to 10 times its volume with anhydrous ethanol.
Emoticon Emoticon