pH electrode care and maintenance
1, PH electrode is not normally used, can be immersed in 3mol / l kcl solution or saturated kcl solution, strictly prohibit the electrode to be immersed in distilled water, demineralised water or tap water, etc., the plasma content of the liquid is very small.
2,If the PH electrode has been exposed to air for a long time, before re-use, please soak the electrode in 3mol/l kcl solution or saturated kcl solution for 2~3 days to make the electrode active again, if there are conditions, please soak the electrode in 9895 electrode regeneration solution for 1 minute or so, and then wash it with distilled water, and then soak the electrode in 3 mol/l kcl solution or saturated kcl solution for at least 1 day before using it. solution for at least 1 day before use.
3, if the electrode sensitive membrane or white ceramic diaphragm hole by protein pollution and yellowing, you can buy 9891 electrode cleaning solution, the electrode will be immersed in it for a few hours, and then washed with distilled water, and finally immersed in 3 mol / l of kcl or saturated kcl solution for at least 1 day before use.
4, if the electrode white ceramic diaphragm hole by Aq2S pollution and black, you can buy 9892 diaphragm cleaning solution, the electrode will be immersed in which a few hours until the diaphragm hole and then white, and then washed with distilled water, and finally immersed in 3 mol / l kcl or saturated kcl solution for at least 1 day before use.
5, if the electrode is used for a long time and cause sensitive membrane aging, you can buy 9895 electrode regeneration solution, the electrode will be immersed in which 1 ~ 10 minutes (according to the degree of aging of the sensitive membrane and the slope of the decision of the immersion time), and then washed with distilled water, and finally immersed in 3mol / l of kcl and saturated kcl solution for at least 1 day before use, strictly prohibit the slope of the PH electrodes above 56mv / ph with a slope of 56mv / ph, the electrode will be used for a minimum of 1 day, the electrode will not be able to use. PH electrode with slope above 56mv/ph is strictly prohibited to be processed by 9895, because 9895 electrode regeneration solution contains HF solution, the principle of 9895 is to corrode off the aging layer of the sensitive membrane on the surface with HF, if the new electrode is immersed in 9895 electrode regeneration solution or the old electrode is immersed too long in it, HF will corrode off the good part of the sensitive membrane as well.
6, if the PH electrode is contaminated by inorganic substances can be 0.1 mol / l of Hcl or NaOH solution for a few minutes, and then wash with distilled water.
7, if the PH electrode is contaminated by organic substances, can be cleaned with alcohol or acetone, and then washed with distilled water.
8,If you know what kind of substance can be used to dissolve the substance polluting the electrode, you can use what kind of substance to clean it.
9, please remember, with 9891, 9892 or 9895 treated PH electrode, please do not calibrate or measure immediately, because then the electrode can not be measured, you must soak the electrode in 3 mol / l or saturated kcl solution for at least 1 day before use.
10, PH electrode upper end and cable connectors are high impedance parts, prohibited by water and other liquids or steam and other humid air erosion, can be used to cover the new electrode with a small red nut, electrode cable connectors also belong to high impedance parts, is strictly prohibited by water and other liquids or steam and other humid air erosion, be sure to be stored in a dry place.
