Analysis of Food Dyes
Qualitative and Quantitative Analysis of Food Dyes >> Step 4 : Part 1
Qualitative and Quantitative Analysis of Food Dyes
You are now ready to prepare a 50 mL sample of your drink according to the package instructions. You will then transfer about 10mL of this solution to a vial for the colourimetric measurement. The measurement can be performed on a mixture of dyes provided the analytical wavelenghts of the two dyes present in the drink are far apart.
The instructions on the packet are: dissolve the content of the package (6g) in 2L of water.
Once the drink has been prepared, the vial is measured in the colourimeter. Use the colourimeter simulation below to measure the absorbance of the unknown sample (purple vial). Once you have measured the absorbance of your sample, use your graph to determine the concentration of the solution and enter your answer into the question below the simulation. If you get stuck, tutors are included to walk you through determining the concentration of your drink sample.
Now that you have measured the absorbance of your sample, use your graph to determine the concentration of the solution and enter your answer into the tutor below.
The following tutors are a step by step walkthrough that show the details on how to solve the above problem.