Ph Electrode Maintenance; Daily Maintenance; Calibration Buffer Solution; Protect Glass Bulb - Dostmann pH 7+ Manual Del Usuario

EN

pH electrode maintenance

Daily maintenance

The soaking solution contained in the supplied protective bottle is used to maintain activation in the glass bulb and
junction. Loosen the capsule, remove the electrode and rinse in pure water before taking a measurement. Insert the
electrode and tighten the capsule after measurements to prevent the solution from leaking. If the soak solution is turbid
or moldy, replace the solution.
The electrode should not be soaked in pure water, protein solution or acid fluoride solution for long periods of time. In
addition, do not soak the electrode in organic silicon lipids.
For best accuracy, always keep the meter clean and dry, especially the meter's electrode and electrode jack. Clean with
medical cotton and alcohol if necessary.

Calibration buffer solution

For calibration accuracy, the pH of the standard buffer solution must be reliable. The buffer solution should be refreshed
often, especially after heavy use.

Protect glass bulb

The sensitive glass bulb at the front of the combination electrode should not come in contact with hard surfaces.
Scratches or cracks on the electrode will cause inaccurate readings. Before and after each measurement, the electrode
should be washed with pure water and dried. Do not clean the glass bulb with a tissue for it will affect the stability of
the electrode potential and increase the response time. The electrode should be thoroughly cleaned if a sample sticks
to the electrode. Use a solvent if the solution does not appear clean after washing.

Regenerate glass bulb

Electrodes that have been used over a long period of time, will become ageing. Submerge the electrode in 0.1mol/L
hydrochloric acid for 30 seconds, then wash the electrode in pure water, then submerge it in soaking solution for 24
hours.
Clean contaminated glass bulb and junction
Contamination Abluent
Inorganic metal oxide Dilute acid less than 1mol/L
Organic lipid Dilute detergent (weak alkaline)
Resin macromolecule Dilute alcohol, acetone, ether
Proteinic haematocyte sediment Acidic enzymatic solution (saccharated yeast tablets)
Paint Dilute bleacher, peroxide
Note: if the electrode housing is polycarbonate. When use abluent, take cautions on carbon tetrachloride, trichlorethylene,
tetrahydrofuran, acetone, etc which will dissolve the housing and invalidate the electrode.
mV measurement
Press key, and switch the meter to mV measurement mode.
Connect ORP electrode (need purchase it separately) and dip it in sample solution, stir the solution gently and leave It
solution until icon appears, and get the reading which is ORP value.
ORP means Oxidation Reduction Potential. The unit is mV.
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