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Double Junction Mercury Sulfate Reference Electrode

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SPECIAL SHIPPING DETAILS: Please note that reference electrodes always ship separately.  Special shipping arrangements may be required to process your order if you purchase a reference electrode.

HAZARDOUS MATERIALS: Additional fees may be applied to cover the costs of shipping the double junction mercury sulfate reference electrode.  This electrode also may not be available for sale in all countries.

The standard double junction mercury sulfate (Hg/Hg2SO4) reference electrode contains two filling solutions: both inner and outer compartments are filled with saturated K2SO4 solution.  Only the outer fill solution comes in contact with electrolyte via the ceramic frit at the bottom, allowing an extra layer of protection between your electrolyte and the inner fill solution.  This can help prevent trace Hg2SO4 in the inner fill solution from diffusing into the bulk electrolyte.  The outer fill solution may also be drained manually and refilled with a different aqueous solution of the user's choice, if there is a need to avoid either K+ or SO42- ions.

See "Description" tab below for additional precautions and information.

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# Description Price in USD
Reference Electrode
RREF0026

Double Junction Mercury Sulfate (Hg/Hg2SO4) Reference Electrode
includes 14/20 PTFE adapter, storage bottle, bottle of filling solution

Optional Accessories
RRPG331

Standard Size Reference Electrode Storage Vessel
125 mL flask with 14/20 taper glass joint

reference electrodes sold separately

RRPG097

Fritted Glass Isolation Tube
for additional isolation of the reference electrode from the main test solution

ACEP1420R12

PTFE Mount for Fritted Tube
slides around fritted tube, fits into a 14/20 port

AKTUBE1420

Reference Electrode Salt Bridge Kit
for superior diffusional isolation of the reference electrode from the main test solution

THCLIP

Alligator Clip, fits Banana Plug
slides on to banana cable plug to allow clip connection to pin on end of reference electrode

ACBPCWBB

Shielded Coax Cable, male BNC to Single Banana Plug
for discontinued CBP bipotentiostat, BNC male fits reference connection on front panel of CBP

SPECIAL SHIPPING DETAILS: Please note that reference electrodes always ship separately.  Special shipping arrangements may be required to process your order if you purchase a reference electrode.

HAZARDOUS MATERIALS: Additional fees may be applied to cover the costs of shipping the double junction mercury sulfate reference electrode.  This electrode also may not be available for sale in all countries.

MERCURY DISCLOSURE: To function properly, this electrode necessarily contains a small amount of mercury.  The maximum amount of mercury in this electrode is 0.3 grams.  See SDS Forms tab for safety information.

Avoid using this reference electrode with the following: perchlorates and non-aqueous/organic solvents

The standard double junction mercury sulfate (Hg/Hg2SO4) reference electrode contains two filling solutions: both inner and outer compartments are filled with saturated K2SO4 solution.  Only the outer fill solution comes in contact with electrolyte via the ceramic frit at the bottom, allowing an extra layer of protection between your electrolyte and the inner fill solution.  This can help prevent trace Hg2SO4 in the inner fill solution from diffusing into the bulk electrolyte.  The outer fill solution may also be drained manually and refilled with a different aqueous solution of the user’s choice, if there is a need to avoid either K+ or SO42- ions.

The reference electrode fits through the standard 14/20 ground glass joints found on our standard electrochemical cells.  A PTFE sleeve (included) facilitates mounting the reference electrode in the joint.

The junction at the lower end of the reference electrode is a ceramic frit that should be kept wet at all times.  If frit dries out, soak overnight in distilled water.  More information about care, storage, and usage can be found in the product information sheet, which you can download from the Documentation tab.

A small vial containing saturated K2SO4 electrode filling solution is included with the double junction mercury sulfate reference electrode.

View SDS Forms for reference electrodes and electrolyte filling solutions.

Visit our YouTube channel for helpful instructional videos regarding the use and maintenance of this and many other Pine Research products!

All specifications are subject to change without notice.
Double Junction Mercury Sulfate Reference Electrode

Standard Potential

0.650 V vs. NHE

Inner and Outer Filling Solutions

Saturated K2SO4

Document # Title

DRP10029

Double Junction Mercury Sulfate Reference Electrode Product Information
click here to download (336 KB download)

Material Link

Mercury

click here to download (129 KB download)

Mercury (I) sulfate

click here to download (65 KB download)

Saturated potassium sulfate

click here to download (368 KB download)

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