During our Biology class we went to the lab where we tested milk for, starch, using iodine solution, reducing sugars, using benedict solution and also proteins using biuret solution and bioling it for two minitues. Our conclusion were that milk does not contain starch, it contains reducing sugars and proteins. We completed the charts below and took some pictures during and after the expirement.
|SAMPLE||REAGENT||COLOUR BEFORE INVESTIGATION||COLOUR AFTER INVESTIGATION||CONCLUSION|
|A||Iodine Solution||White||Orange||Starch is not present|
|B||Benedict Solution||White||Purple||Milk contains reducing sugars|
|C||Biuret Solution||White||Orange/Yellow||Proteins are present|
|Test for starch||iodine solution||Orange||Black|
|Test for protein||biuret solution||Blue||Orange/Yellow|
|Test for reducing sugars||benedict solution||Blue||Purple|