Day 2

  • What did you do today?
    • Today, we carried out the second experiment, which was to Extract and Identify Artificial Colouring from Food, specifically, from M&M candies. By soaking wool in acetic acid and boiling it, we made use of wool as a binding agent as it could be protonated under acidic pH levels, giving it a positive charge. As such, we could bind the colours to the wool, then remove them with an alkali solution to perform Thin Layer Chromatography(TLC). This allowed us to identify the colours by comparing them with the Chromatography results of Standard Colourants.

  • What did you learn today?
    • I have learnt that Artificial Colourants do not add any nutritional value to food (unless they are Natural Colourants made from fruits, vegetables,etc.) 
    • Artificial Colourants are meant to add more visual appeal to food
    • However, as Artificial Colourants are made from chemicals, some forms of Artificial Colourants may be unsafe for consumption, thus the government regulates the use of such chemicals to protect our health
    • I also learnt how much Artificial Colouring can be found in a bag M&M candies
  • How do you feel about today’s activities?
    • I think that today's activities has helped me to understand that there are solid purposes behind carrying out experiments, and they are not just carried out just for fun. They are carried out with a purpose in mind, which could be finding a benefit in a certain object, or studying a scientific principle.
    • I think today's experiment was alright, we at least got the results we expected, but I feel that in my opinion, yesterday's experiment (the one about Caffeine) was more interesting as there were more steps and procedures to carry out.
  • What new questions do you have regarding the discipline?
  • I want to know what other experiments are there out there which are similar to the 2 we have done which will benefit people or the environment.

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