Lipid Test
Firstly we got the 5 food items that we would be testing on
These included, Cheese, bread, dried apricot, cracker and apple, from left to right. These were rubbed in oil and left for a period of time. After removing the food from the oil we found out that the Cheese was the only food item that tested positive. The ones that remained unchanged were negative for the test
Starch Test
For the Starch test we chose the same 5 food items. The items we needed were the plate with the depressions on them with the food placed in them. After we placed the food in them, we then placed Iodine solution of 2 drops each on the food and waited 2-3 minutes to see which food items would turn black. As you can see from the photo the food that tested positive were the ones that turned black which are the cracker and the bread. The ones that were negative were the ones that remained unchanged.
Sugar test
For the sugar test we again used the same food samples. The equipment needed for the test was 5 test tubes, test tube rack, beaker, heater, Benedict solution. We first put the food items into labelled test tubes. From left to right it was, Apple, cheese, apricot, bread and the cracker. We put distilled water into each of the 5 test tubes and then proceeded to put 10 drops of Benedict solution in them. After we put the drops in, we then put the test tubes in the boiling water for about 5-10 minutes for speed up in reaction time. Once we had taken them out we found out the the cheese, apricot and bread all tested positive for sugar as their color changed into an orange color. The ones that tested negative remained a light blue.
Firstly we got the 5 food items that we would be testing on
These included, Cheese, bread, dried apricot, cracker and apple, from left to right. These were rubbed in oil and left for a period of time. After removing the food from the oil we found out that the Cheese was the only food item that tested positive. The ones that remained unchanged were negative for the testStarch Test
For the Starch test we chose the same 5 food items. The items we needed were the plate with the depressions on them with the food placed in them. After we placed the food in them, we then placed Iodine solution of 2 drops each on the food and waited 2-3 minutes to see which food items would turn black. As you can see from the photo the food that tested positive were the ones that turned black which are the cracker and the bread. The ones that were negative were the ones that remained unchanged.Sugar test
For the sugar test we again used the same food samples. The equipment needed for the test was 5 test tubes, test tube rack, beaker, heater, Benedict solution. We first put the food items into labelled test tubes. From left to right it was, Apple, cheese, apricot, bread and the cracker. We put distilled water into each of the 5 test tubes and then proceeded to put 10 drops of Benedict solution in them. After we put the drops in, we then put the test tubes in the boiling water for about 5-10 minutes for speed up in reaction time. Once we had taken them out we found out the the cheese, apricot and bread all tested positive for sugar as their color changed into an orange color. The ones that tested negative remained a light blue.
Those are good pictures and explanations - not sure what you did with the lipid test... you were supposed to use oil as the example of the positive test. And I don't think cheese would have tested positive for sugar....
ReplyDelete