2. Methods

2.1 Equipment list 

2.2 Diagram 

2.3 Procedure
We tried 2 different methods - soaking and blotting. At first we tried soaking the pieces of cloth with ink stains into the different chemicals. The results were not satisfactory thus we decided to apply another method to have more variation in the results.

The First Method: (Soaking)

1.  Drip four drops of ink on a piece of cloth. Allow the cloth to absorb the ink for five minutes.
2. Mix a teaspoon of the chemical with an equal amount of water in a beaker.
3. Place the cloth in the beaker for 15 minutes

The Second Method: (Blotting)

1. Repeat step 1 of the first method.
2. Place the cloth on top of a thick towel.
3. Place a piece of cotton wool on top of the cloth.
4. Mix a teaspoon of the chemical with an equal amount of water.
5. Pour the mixture on top of the cotton wool.
6. Allow it to soak for 15 minutes.

2.4 Risk Assesment and Management 

2.5 Data Analysis 
To collect data based on the results of each kitchen chemical, the following were the steps we took. 

1. Cut a small hole on the lid of the box
2. Ensure that the light sensor of the photometer is aligned with the hole while leaving the data display outside.
3. Close the lid, ensuring that there are no holes which light could go through, and place one piece of cloth on top of the hole, making sure that the part that was stained is the area directly above the hole.
4. Shine a light through the cloth, ensuring that the torch is shining is where the hole is.
5. Record the amount of light (lux) that the passes through the cloth.
6. Repeat the process for the other cloths and get the average from 4 results for each chemical and method for reliability.

No comments:

Post a Comment