Here's is what I did:
Collect water samples from Farm Lane bridge (500 mL minimum)þ
Filter water samples using small mesh filter
Note: Weigh the dried filter before filtration!
Dry the filter in drying oven (~24 hours)þ
Weigh the filter after drying.
Day Initial Weight Final Weight
4-Apr 0.122 0.12
5-Apr 0.122 0.12
6-Apr 0.12 0.12
11-Apr 0.122 0.121
12-Apr 0.12 0.123
13-Apr 0.12 0.123
18-Apr 0.122 0.123
20-Apr 0.122 0.122
25-Apr 0.122 0.121
Do I measure turbidity using a before and after measurment of my water samples?
Normally you measure the turbidity before sampling.
Bot, Please answer this question
Find the mean absolute deviation (MAD) of the data
98 132 295 68 176 89 287 198 94 68 240 94 369 94 155
To measure turbidity using the data you have collected, you can calculate the change in weight of the filter before and after drying. Turbidity is a measure of the cloudiness or haziness of a fluid caused by the presence of suspended particles. The more suspended particles there are in the water, the greater the turbidity.
In your data, you have recorded the initial weight (before filtration) and the final weight (after drying) of the filter for each day. To determine if there is any change in turbidity between the water samples, you should subtract the final weight from the initial weight for each day.
For example, using the first day's data:
Initial weight: 0.122 g
Final weight: 0.12 g
Change in weight: 0.122 g - 0.12 g = 0.002 g
Repeat this calculation for each day and you will have the change in weight for all the samples.
Next, you can infer turbidity based on the change in weight. Generally, the more particles present in the water, the greater the change in weight of the filter due to the deposition of these particles during filtration. A larger change in weight would indicate higher turbidity.
Finally, it is important to note that this method provides a rough estimate of turbidity and is not as accurate as using specialized turbidity meters or devices.