420P-01 Portable PH_ Ion meter Description

introduce

This method provides a method for field measurement of the pH value of conventional water. Using the 9107BNMD three-in-one composite pH electrode, it can be widely used in the field measurement of the pH value of conventional water samples.

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. Tear off the pH7.00 buffer solution bag and put it away for later use.

2. Tear off the pH4.01 or pH10.01 buffer bag and put it away for later use.

sample preparation

1. Take a certain amount of sample to be tested and pour it into a beaker.

2. If you need to measure other samples, please repeat the above steps.

electrode storage

Short-term storage of electrodes (less than one week)

Put the cotton soaked in the electrode storage solution into the electrode storage solution bottle or the electrode protective sleeve, and then insert the electrode to ensure that the electrode glass bubble and the liquid junction are kept moist.

Long-term storage of electrodes (more than one week)

Wash away the precipitated crystalline salt with deionized water, and remove the deposits on the electrode tip and the liquid junction according to the method in the cleaning part of the electrode. Put on the electrode protective cover and store dry.

Soak the pH electrode in the pH electrode storage solution (910001). If there is no electrode storage solution, 1g KCl can be added to 200mL pH7 buffer as a temporary electrode storage solution.

Do not let the solution evaporate and crystallize on the surface of the electrode, and do not soak the electrode with deionized water, which will shorten the service life of the 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. Gently shake the electrode, (just like shaking a thermometer), to remove the air bubbles in the electrode. 4. Soak the electrode in pH electrode storage solution 910001 for one hour.

instrument preparation