I'm working on a chemistry report and need a sample draft to help me learn.
Prepare a 1000ppm stock standard of caffeine by dissolving 198.2mg of caffeine in 200 ml purified water. Prepare working standards by pipetting 25, 12.5, 10, 7.5, 5 and 2.5ml aliquots of the stock standard solution into separate 50 ml volumetric flasks and dilute to volume with purified water.