Colour Test. 1. Label the test tubes with their number and appropriate name; #1 Control, #2 Canadian Guideline, and #3, #4, #5, #6. 2. Pour the 50 mL.

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Presentation transcript:

Colour Test

1. Label the test tubes with their number and appropriate name; #1 Control, #2 Canadian Guideline, and #3, #4, #5, #6. 2. Pour the 50 mL of Canadian Guideline into the #2 test tube.

3. Fill the #1 Control test tube with the deionized water to the same level as the #2 test tube. 4. Fill the #3 Sample test tube with sample water to the same level as the #2 Canadian Guideline test tube.

5. Hold the #3 sample test tube between the #1 and #2 tubes over a white piece of paper. 6. View the test tubes from above: Is the colour of the #3 Sample lighter or darker than the colour of the #2 Canadian Guideline Sample? 7. Record the results. 8. Repeat steps 4-6 with the remaining samples (#4, 5, and 6). Results: If the water sample has a colour lighter or equal to that of the Canadian Guideline test tube then it passes the Guidelines for Canadian Drinking Water Quality guideline for colour. If the water sample is darker in colour than that of the Canadian Guideline tube, it fails the Canadian Drinking Water Guideline of 15 TCU (True Colour Units).