Water Quality Testing Setting up a pH test with LoggerPro

You will need….  Water/liquid samples  100 mL beakers ( 1 per group per sample)  computers  Vernier computer interface  Vernier pH sensor  LoggerPro  Wash bottle with distilled water  Duct tape and markers for labeling  Water/liquid samples  100 mL beakers ( 1 per group per sample)  computers  Vernier computer interface  Vernier pH sensor  LoggerPro  Wash bottle with distilled water  Duct tape and markers for labeling

How to Conduct pH Tests  Obtain LoggerPro & Vernier pH sensor  Collect water samples  Prepare pH sensor  Connect sensor and interface to computer  Connect pH experiment file to sensor  pH-test away!  Obtain LoggerPro & Vernier pH sensor  Collect water samples  Prepare pH sensor  Connect sensor and interface to computer  Connect pH experiment file to sensor  pH-test away!

Collect Water Samples  Collect water samples from open bodies of water, water fountains, and bottled water.  Also collect samples of OJ or tomato juice for comparison  Label sample beakers with tape & marker

LoggerPro  Download free trial or purchase through Vernier  Open “20b Watershed Testing” experiment, under “Biology for LoggerPro” in “Experiments” folder  Download free trial or purchase through Vernier  Open “20b Watershed Testing” experiment, under “Biology for LoggerPro” in “Experiments” folder

Vernier pH sensor  Connect pH sensor to power source and computers following directions supplied by Vernier  Clean sensor with water and place into cup of distilled H20  Connect pH sensor to power source and computers following directions supplied by Vernier  Clean sensor with water and place into cup of distilled H20

Connecting to LoggerPro…  Once connected, go to LoggerPro and under “Experiments”, choose “Set up sensors”.  Choose your sensor  You will now see the pH and temp. flux

pH Testing  Insert probe into samples, watch pH level on computer screen, and take reading once pH reading has stabilized  Rinse sensor between samples

Analyzing Data  You can have students create bar graphs in LoggerPro using their data to analyze their results  This can be done easily by creating a new graph and manually inserting data  You can have students create bar graphs in LoggerPro using their data to analyze their results  This can be done easily by creating a new graph and manually inserting data