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About the nitrite reducing bacteria (nrb) tests / dipslides (box of 10)
NRB metabolises nitrate / nitrite thereby reducing nitrite levels and producing ammonia. Both of these outcomes can lead to corrosion.
Systems are often treated with nitrite / nitrate as a corrosion inhibitor. Since NRB reduces nitrite, the corrosion inhibiting abilities of the nitrite are then diminished. A by product of this metabolisation is ammonia. Ammonia is a compound that has corrosive properties. This makes NRB a two fold problem when it comes to corrosion and potential degradation of systems / equipment.
What is a Nitrite Reducing Bacteria Test?
A Nitrite Reducing Bacteria (NRB) test is a tube that contains an orange culture gel which changes to a pink colour depending on the level of ammonia detetced in the sample (indicating the presence of nitrite reducing bacteria). It is usually used to assess the levels of NRB contamination in water and provides results in 5 days of testing when incubated at 30˚C.
These tests come in a pack size of 10 slides / tests per box.
- Add 2ml of the test sample to the tube. To aid the user, 2ml of test sample can be determined by adding the sample up to the moulded line in the tube.
- Incubate the NRB test / dipslide at 30 degrees C for up to 5 days. Check the test daily for the first three days.
- If there is no colour change or gas bubbles after 5 days, this indicates a negative result.
How to use NRB Test Tubes
Step 1 : Remove NRB test cap
Remove one NRB test from the NRB test kit and unscrew the cap (anticlockwise) to remove it.
Step 2 : Add 2ml of sample fluid
Add 2ml of sample fluid to the NRB test. If you do not have a measuring syringe, fill the tube up to the embedded fill line on the tube (which equals 2ml).
Step 3 : Replace the cap
Replace the cap on the NRB test.
Step 4 : Incubate the NRB Test
Incubate the tube at 30 degrees C for up to 5 days. We suggest the SRB/NRBINC Incubator for this as it is designed specifically to fit our NRB test tubes.
Step 5 : Check the NRB test
Compare the NRB colouration with the chart provided.
For incubation, our NRB tests will need to be used with our compatible NRB incubator which can be found here: NRB Incubator
Industry sectors include
- Oil and gas industry
- Closed water system
- Systems containing nitrite corrosion inhibitor
Product Reference : DSNRB
Internal catalogue reference : DS001-148
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