Skip to main content

10X Citrate Buffer pH 8.0, Novus Biologicals

Bio-Techne includes Novus Biologicals | Catalog # NB900-66729

Catalog #
Size / Price

Key Product Details



Product Specifications


10x Citrate Buffer pH 8.0 for Heat Induced Epitope Recovery

Application Notes

The antigen retrieval protocol is recommended for use in tissues that have been fixed in formalin only. Ensure that the fixed sections are adequately embedded in paraffin. Cut tissue sections to 4-5 microns.

Preparation of Working Solutions
1. The 10X concentrated format should be diluted tenfold with distilled or deionized water.
2. Mix one part of concentrated Antigen Retrieval Solution with nine parts of deionized or distilled water.
3. Shake the bottle vigorously to completely mix the components of the concentrate (the solution may separate into phases over time).
4. Store with cap tightly secured.

Protocol Recommendations
1. Deparaffinize and rehydrate tissue sections.
2. Place slides into 1X retrieval solution in a slide container (e.g. Coplin jar, Tissue-Tek, staining dish or metal slide canister).
3. Retrieve sections under pressure.
4. After take-off reagent jar containing slides from pressure cooker, allow the slides to cool for 20 minutes to reach room temperature.
5. Wash slides in deionized water and then with wash buffer. Proceed with immunostaining recommendations in the antibody datasheet.
6. Gently rinse by gradually adding DI water to the solution, then remove slides and rinse with DI water.

Formulation, Preparation, and Storage


Dilute one part buffer with nine parts distilled water.


0.05% Sodium Azide


Please see the protocols for proper use of this product. If no protocol is available, contact technical services for assistance.


The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.


Store at room temperature.

Background: 10X Citrate Buffer pH 8.0

In order to perform immunostaining, the tissue specimens should be fixed in appropriate fixative. The purpose of such fixative is to conserve the tissue from autolysis, to preserve tissue structures and to immobilize antigens. However, this requires harsh treatment of the antigens. As a result, antigens undergo chemical alteration of their primary, secondary and tertiary structures. Because of changes in the protein containing epitopes or in neighboring proteins, antigenic sites may be masked. In past, enzymatic treatment with proteolytic enzymes i.e. pepsin, trypsin or pronase has been performed to regain the masked antigens. Shi et al. (1991) have reported that the treatment of the tissue section with heavy metal solution in a microwave can regain the masked antigens significantly. However, heavy metals in the solution increase the risk of exposure to lead for lab personnel. To solve this problem, we have developed a new antigen unmasking solution which is free from heavy metals. Use of this antigen unmasker can prevent the risk of unnecessary exposure for lab personnel and also resolve the handling and disposal problem.

Additional 10X Citrate Buffer pH 8.0 Products

Product Documents for 10X Citrate Buffer pH 8.0

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Product Specific Notices for 10X Citrate Buffer pH 8.0

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Support products are guaranteed for 6 months from date of receipt.