Fruit can range in pH from highly acidic fruits, such as oranges and cranberries, to bananas and melons, which are more alkaline. To test the pH balance of fruit, you will need to obtain a pH test kit. These are available as bottled test strips from health food stores and pharmacies. You can also use pH test kits from pool supply, home improvement and pet stores. The testing procedure is very easy and can be performed at home.
Testing the pH of Fruit
Cut open the piece of fruit to be tested. Ensure the surface of the fruit is moist. In the case of dry fruits, such as bananas, mash a portion of the fruit, if necessary. Do not add water or other liquids to the fruit, as this may alter the pH reading.
Remove a pH test strip from the kit. Touch the end of the pH test strip to the fruit, ensuring that thorough contact is made with the juice.
Wait for the test strip to react. The color of the strip will change. Follow the directions on the package for the test strips for the proper time to wait. This step usually takes about 15 seconds.
Compare the color of the test strip with the color chart that comes with the kit. Match the color to get a reading of the pH of the fruit.