MilliporeSigma
All Photos(2)

Documents

BASMF2052

Sigma-Aldrich

Ag/AgCl (3M NaCl) Reference Electrode

Sign Into View Organizational & Contract Pricing

General description

RE-5B Ag/AgCl (3M NaCl) Reference Electrode with Flexible Connector

TESTING THE PERFORMANCE OF Ag/AgCl
REMOVING THE SHEATH: Every Ag/AgCl reference electrode is shipped with a yellow plastic sheath that covers the porous frit and slows drying. Immediately remove the sheath upon receipt and store electrode in appropriate solution. It’s recommend soaking the tips in the 3M salt solution for about an hour after removing the protective cover. Please check that there are no bubbles on the electrode frit. If there are bubbles on the frit on the inside of the electrode, you will need to flick or tap the side of the electrode near the frit to dislodge the bubbles so that they rise to the top of the electrode. Bubbles on the frit can cause an unsteady signal and damage the electrode. The redox potential for the Ag/AgCl (3M NaCl) Reference Electrode is +0.209 V (vs. NHE). Be extremely careful when removing the plastic sheath from the reference electrode. DO NOT roll the plastic down and pull off. The best method is to cut the length of the plastic sheath with scissors and peal the sheath off the electrode. Start with a small cut at the upper edge of the sheath, pull to the side, and continue to cut and peal to the tip. A scalpel may be used, but there is greater chance of damaging the heat-shrink tubing.

DISLODGING BUBBLES: Bubbles lodged in the tip may prevent electrical contact with the electrolyte and may damage the working electrode. Bubbles can be dislodged by holding the top of the electrode with one hand and tapping the electrode near the frit tip until the bubbles rise to the top.

REGENERATING THE
STORING REFERENCE ELECTRODES: After the sheath is removed, store the electrode tip in 3 M NaCl or 3M KCl solution. We do recommend storage vial for efficient storage. Only the tip needs to be immersed in the storage solution; the connecting pin needs to be kept dry to minimize corrosion. The reference electrodes are easily ruined by drying and will naturally change with use due to the ion and solvent transport across the porous frit. This rate of change is a function of the difference in composition between the sample solution vs. the filling solution and the amount of time not immersed in the storage solution.

Legal Information

Product of Bioanalytical Systems, Inc.

Hazard Statements

Precautionary Statements

Hazard Classifications

Aquatic Chronic 3

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service