Dimension: 10×10，5×10，10×20，15×15，20×20，30*30,40*40,50*50
Purity: >99.99%
Holder: PTFE
Length: 100 mm
Maintenance and Precautions:
1. Before use, the electrode platinum sheet can be cleaned in chromic acid solution, and then washed with distilled water.
2. If oil sticks to the surface of the platinum sheet, it should be cleaned with acetone, and then cleaned in chromic acid solution and distilled water.
Use and maintenance
1. Soak and clean the electrode surface with water before use. Various pH/mV meters can be used in conjunction with the calomel electrode or silver silver chloride for the measurement, and the electrode is directly inserted into the sample, and the reading is taken when the potential is stable.
2. In-situ measurement of soil, sediment, etc. must be done carefully. Do not deform the end and make the surface rough. It can be soaked in water when it is not in use for a while, and it can be stored in a box if it is not used for a long time.
3. After the electrode has been used for a long time, the surface oxide film or adsorbate should be heated to 70°C for 2 hours with 0.2MHc1v1-0.1MNac1-0.2%Na2SO3 mixed solution, and then in 0.05m potassium hydrogen phthalate solution saturated with quinhydrone The middle detection potential E should meet the following formula:
E=455—0.09(t—25)—[59.1+0.2(t—25)pH
Wherein: pH is the pH value of 0.05 potassium hydrogen phthalate solution at T°C.
