You have 25 ml of an ATP solution. You take 30 µl and dilute to a final volume of 10 ml. The OD of this solution is 0.432.
What is the concentration of the undiluted ATP solution?
(molar extinction coefficient = 15,400 M-1cm-1).
How many mg of ATP are there in the original solution? (FW of ATP = 551.15 g/mol)