pH meter

ExStik Waterproof PH100 to measure soil pH

ExStik Waterproof pH meter model PH100 can be used take measurement of solutions and soil pH.  This pH meter can measure pH 0 to 14 with accuracy of up to 2 decimal places.  

Attention: Be careful that you don’t break the glass at the tip of the pH module.

Materials:

• pH meter with battery and pH module attached
• working aliquots of calibration standards/solutions:   pH 4, 7, 10
• storage solution
• wash beaker
• rinse bottle with distilled water
• Kim wipes to dry wet pH module
• clean gloves

Methods:

1. Turn on Extik pH meter and remove the green cap.
2. Using rinse bottle, wash the pH module with distilled water.
3. Soak the module in pH4 solution for atleast 10 minutes. Rinse with distilled water.  Dry with kim wipes.

    Calibration using pH 4, 7 and 10 solutions.

1. Soak pH module in pH 7 solution and then press CAL.  The pH should read 7 after a few seconds. Rinse and dry.
2. Tranfer pH module into pH 4 solution.  Press CAL.  Wait until the pH value is stable. Rinse and dry. 
3. Move pH module into  pH 10 solution.  Press CAL. When calibration is complete, you will see END on display. Rinse and dry.

    Measure pH of soil

1. Ensure that pH meter is in normal operation mode and that numbers 4,7 and 10 are encircled. 
2. Gently touch your soil mix with the tip of clean pH module to determine pH of moist soil. Read soil pH.  Rinse and dry.
3. Repeat 8 for all soil samples.
4. Store pH meter with attached module clean and dry.

For more information, please see manual.

Measure pH solution using Hanna pH electrode with temperature sensor connected to Hanna Edge

pH/temperature electrode HI11310 is made for solvents and can measure pH 0 to 13 and -5 to 100°C.

Materials:

• pH electrode connected to Hanna Edge
• working aliquots of calibration standards:   pH 4, 7, 10
• cleaning solution
• storage solution
• wash beaker
• rinse bottle with distilled water
• kim wipes
• hand gloves

Methods:

1. Connect pH electrode to Hanna Edge tablet.  Turn on Hanna edge

    Prepare the electrode

1. Remove the filling hole cover.
2. Remove protective cap by loosening the screw and gently pulling the electrode out.
3. Make sure that the electrode is not dry inside and tip is always in contact with liquid.
4. Rinse electrode with distilled water.  Dry the electrode with Kim wipes.

   Calibrate pH electrode using pH 4, 7 and 7 standards

1. Dip pH electrode to pH 7 calibration standard buffer. Press Cal/Modify on Edge.  Once CFM starts blinking, press GLP/CFM. Rinse electrode and dry with Kim wipes.
2. Transfer electrode to pH 4 calibration standard.  Once CFM starts blinking, press GLP/CFM. Clean and dry the electrode again.
3. Finally, dip the electrode to pH 10 calibration standard. Wait until CFM starts blinking before pressing GLP/CFM.
4. Press CAL/Modify to log the calibration curve.  Your pH meter is ready to use when the calibration condition is good and the slope is greater than 95%.

  Measure pH of solution

1. Dip the  pH electrode it into your well dissolved solution and wait until the pH value stabilizes.  Read pH.  Rinse and dry pH electrode.
2. Repeat 10 for all solutions.
3. Store clean electrode with protective cap back on and filling hole covered.

Also read the manual for more information.

You do need to book to use this equipment. You may request for Environmental sensor use/other equipment training at Bookitlab Reservations page if you are using the equipment for the first time.