concentrations and dilutions of food dyes

concentrations and dilutions of food dyes - Sam Christy...

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Sam Christy Jarrod Googins, Travis Dunn He Li 11/13/07 Concentrations and Dilutions of Food Dyes Introduction: For this lab we were to take a specified dye, in this case FD&C Blue 1, and dilute it to make different dilutions. The concentration of the dye was 0.079284. After we have made all of the dilutions, which were all 1:10 dilutions, we were to run the samples through an UV-Vis Spectrometer. An UV-Vis Spectrometer is a device that measures the amount of visible and ultraviolet light that is able to pass through a given sample. We were then to notice the different relationships between the dilutions and the unknown dilution. From these observations, a conclusion could be drawn as to what the unknown dilution was. Procedure: Weigh a 100mL volumetric flask with a stopper to the nearest .001g. Fill the flask with water to the scribed line and reweigh it. The weight of water is the difference between the weight of the full flask and the weight of the empty flask. Since the density of water is 1g/mL, the weight of the water should be
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concentrations and dilutions of food dyes - Sam Christy...

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