introduce
This method provides a method for accurately measuring the pH value. The ROSS UltrapH electrode (8102BNUWP) is used. Its unique reference structure makes the measurement accuracy 3-5 times higher than that of electrodes with conventional reference structures. It can be widely used in laboratory and field routine water Accurate measurement of sample pH.
Recommended Device/Model
Routine water pH value precision measurement application package (including all accessories and models) / 1115001
1.4-Star desktop pH/Ion Meter/1115000
2. ROSS UltrapH electrode/8102BNUWP
3. Electrode holder/090043
4. ATC probe/927005MD
5. Beaker/(150mL)
6. Graduated cylinder / (100mL)
7. Wash the bottle
Required solution/type
1. pH electrode storage solution/910001
2. pH4.01 buffer / 910104
3. pH7.00 buffer / 910107
4. pH10.01 buffer/910110
5. Deionized water
Preparation of Calibration Standards
Note: Select a two-point calibration standard solution that covers the pH value of the sample. The first point generally chooses a pH7 buffer solution, and the second point selects a buffer solution that is close to the pH value of the sample to be tested (such as pH4 or pH10).
1. Use a graduated cylinder to measure 100mL of pH7.00 buffer solution and pour it into a 150mL beaker.
2. Use a graduated cylinder to measure 100mL of pH4.01 or pH10.01 buffer and pour it into a 150mL beaker.
sample preparation
1. Measure 100mL sample with a graduated cylinder and pour it into a 150mL beaker.
2. If you need to measure other samples, please repeat the above steps.
electrode storage
To ensure a fast response and a smooth fluid junction for the electrode, do not allow the sensitive glass bulb and junction to dry out.
Note: The fill liquid cavity must be kept filled with fill liquid at all times.
Short-term storage of electrodes (less than one week)
Soak the electrode in 910001 electrode storage solution.
Long-term storage of electrodes (more than one week)
There should be a proper amount of filling liquid in the electrode, and the filling hole should be tightly plugged with a plug. Put a few drops of 910001 electrode storage solution into the electrode protective cap, then lightly
Sleeves lightly over electrodes to protect junction and sensitive glass bulb. When using this electrode again, precondition it as you would a new electrode.
equipment preparation
Electrode preparation
1. Gently remove the black electrode head protective cap from the electrode and put it away for later use.
2. Clean the white deposited salt on the outside of the electrode with deionized water.
3. Open the plug of the electrode filling hole and add ROSSTM filling solution 810007. To maintain proper permeation rates, the level of the fill fluid needs to submerge the end of the spiral glass tube and be at least 1 inch (2.5 cm) above the sample level. The filling hole should be opened when the electrode is in use.
4. Place the electrode on the electrode holder for 15 minutes to allow the liquid junction to be effectively wetted. Do not leave the electrode dry after the liquid junction is wet.
5. Gently shake the electrode, (just like shaking a thermometer), to remove the air bubbles in the electrode.
6. Soak the electrode in pH electrode storage solution 910001 for one hour.
