pH Determination Using pH Test Strips and Digital pH Meter
pH Determination Using pH Test Strips and Digital Meter
pH determination of any fluid can be tested using as shown above test strips and below video.
pH is the concentration of the hydrogen ion that ordinarily ranges between about 1 and 10−14 gram-equivalents per liter. It uses for quantitative measure of the acidity or basicity of aqueous or other liquid solutions. A solution with a pH less than 7 is considered acidic; a solution with a pH greater than 7 is considered basic, or alkaline. pH 7 is neutral.
It is usually measured with a pH meter, which translates into pH readings the difference in electromotive force (electrical potential or voltage) between suitable electrodes placed in the solution to be tested as shown below the video.
A pH meter is a scientific instrument that measures pH in water-based solutions, indicating its acidity or alkalinity expressed as pH. The pH meter is also called the potentiometric pH meter because it measures the difference in electrical potential between a pH electrode and a reference electrode. The difference in electrical potential relates to the acidity or pH of the solution. The pH meter is applicable ranging from laboratory experimentation to quality control.
Test Requirements for pH Determination
- pH test strips ( ranging 0-14)
- Test sample ( e.g. urine)
- Digital pH meter
Procedure pH Determination
A. Strip Method
Dip the strip in the sample for 15 t0 30 seconds.
Read the color within 5 minutes and match with reference colors as given on the strip box.
B. Digital pH meter method
Place the probe into the test sample.
Take reading displaying digitally a shown on above video.
Result
A. pH 5 and 6
B. pH: 6.13
The pH of various body fluid
Blood: 7.35 to 7.45
Urine: 4.5 to 8.0
CSF: 7.334 to 7.523
Stool: The average pH for a healthy person is a pH of 6.6.
Bibliography
- https://www.britannica.com/science/pH
- https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ph
- https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/a/acids-bases-ph-and-bufffers
- https://en.wikipedia.org/wiki/PH
- https://www.omega.co.uk/prodinfo/pH-meter.html