Promotional price valid on web orders only. Your contract pricing may differ. Interested in signing up for a dedicated account number?
Learn More
  1. Home
  2. Products
  3. Research and Clinical Diagnostic Tests and Controls
  4. Other Controls and Reagents
  5. Immunoassay Testing
  6. R21093

Thermo Scientific™ Nitrate Disk

Catalog No. R21093
Click to view available options
Quantity:
25 Disks/Vial
This item is not returnable. View return policy
This item is not returnable. View return policy

Description

Determine nitrate reduction by anaerobic bacteria using Nitrate Disks.

Determine nitrate reduction by anaerobic bacteria using Thermo Scientific™ Remel™ Nitrate Disks. In 1977, Widemann et al. utilized a nitrate disk for the detection of nitrate reductase production1. They reported it to be 89% comparable to the more conventional and time-consuming indole nitrate medium assay. Filter paper disks impregnated with potassium nitrate are recommended for presumptive testing of anaerobes2,3.

Determine nitrate reduction by anaerobic bacteria using Nitrate Disks.

  • Ready to use: Reagent-impregnated disk.
  • Rapid test: Results are obtained within 3-5 minutes.
  • Easy to identify: A positive reaction showcases a development of red color after addition of Anaerobic Nitrate Reagent A and B and no color change after addition of zinc dust while in a negative reaction there is no color change post addition of reagent but changes to red after addition of zinc dust.

Organisms that possess nitrate reductase can reduce nitrate to nitrite. Nitrate serves as a source of nitrogen for many bacteria. Molybdate is reported to stimulate synthesis of nitrate reductase4. The first step to nitrate utilization is reduction to nitrite by the removal of one oxygen molecule. Nitrite combines with sulfanilic acid and amino-2-naphthaline to form a red colored end product. Certain organisms can further reduce nitrite to nitrogen, yielding a colorless result. An additional test for the presence of unreacted nitrate must be performed to validate the colorless result. Zinc dust catalyzes the reaction of nitrate to nitrite. Therefore, when zinc dust is added, a red color indicates the presence of unreacted nitrate.

Not all products are available for sale in all territories. Please inquire.

Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.

TRUSTED_SUSTAINABILITY

Specifications

Content And Storage 2°C to 8°C
Description Nitrate disc
Detectable Analytes Nitrite, Free Nitrogen Gas
Format Vial
Quantity 25 Disks/Vial
Product Content Correction

Your input is important to us. Please complete this form to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Your feedback has been submitted: Thank you for helping us improve our website.