RE-6H Alkaline Reference Electrode kit

Hg/Hg₂O alkaline reference electrode is made of Mercury and mercury oxide instead of calomel paste,
and 1 M sodium hydroxide is used as an electrolyte solution. It is used under high pH environment as reference electrode. Main body is made of polyacetal resin.

 

The standard electrode potential of the Hg/Hg₂O alkaline electrode in aqueous solution is:
Hg0 + H₂O +2e ⇔　Hg + 2OH^-
E₀ = 0.098 Vs NHE 25°C


 

Dimension

 

Electrode preparation

The reagents which the customer needs to prepare:
Sodium Hydroxide (NaOH); Mercury (Hg); Mercury (II) Oxide (HgO)

1. 300 µl of 1 M NaOH solution is filled into A tube (shown above) using syringe and then air bubble
    is removed by tapping with finger (Fig. 1).
2. The following reagents are filled based on instructions 1 to 4.
   (1) 100 µl of mercury is filled into B tube using syringe
   (2) Layer mercury oxide powder onto it up to 5 mm
   (3) 1 M NaOH solution is filled until full up the tube, and check if air bubble is not trapped at the tube
        side, so tap it to remove the air bubble
   (4) Screw the cap, and check whether leakage is occured or not
3. 1 M NaOH solution is filled up until full up the A tube.
4. Inspect whether air bubble is trapped into the tube under light illumination.
5. It should be kept at 1 M NaOH solution while it is not used.