Table of caffeine standards concentration Sample Conc, ppm Std1 16 Std2 32 Std3 48 Std4 64 Std5 80 If the volume used to make 100 mL  of std 1 is 2 uL what is the concentration in M used to make a standard calibration curve?  The standards are going to be used to build calibration curve to analyze caffeine in  an energy drink. If 500 mL of  the energy drink  has target of 400 mg  caffeine, how will you prepare the sample if you need 10 mL for the analysis ? .  Caffeine MM=194.19 g/mol.

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