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Tropic Marin NP-Standard

Tropic Marin NP-Standard

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NP-Standard - Reference solution for nitrate and phosphate test kits 


·       Easy testing of the precision of test kits 

·       Calculating a correction factor can improve the accuracy of test results.

·       Only one standard for testing nitrate and phosphate tests 

·       Works with all commercially available tests 


Reagents from test kits can lose their activity over time due to unfavorable storage conditions, high or low temperatures and exposure to oxygen. This can lead to incorrect results. The respective tests should therefore be regularly tested against a stable standard. 


Tropic Marin® NP Standard consists of a solution with nitrate and phosphate, in known concentrations, prepared in the test laboratory. It allows you to quickly check the precision of test kits for nitrate and phosphate. The deviation can be determined and a correction factor can be calculated as necessary. 


Application and dosage


I.Checking the precision of the reagents 

1.)This requires reverse osmosis or demineralized water. Fill the test vial with the required amount of demineralized water (according to the instructions for use of your test). Attach the blue tip on the enclosed 1ml syringe and draw the following amount from the Tropic Marin® NP Standard bottle, depending on the type of test and sample size: 


Tropic Marin® NP-Standard contains 75 mg/l nitrate (NO3-) and 7.5 mg/l phosphate (PO43-)


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