Mineral reference solution for test kits (NO3, PO4)
Product description
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.
Benefits
- 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
Ingredients
75 mg/l nitrate (NO3-) and 7.5 mg/l phosphate (PO43-)
Instructions for use
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:
Add this amount of NP-Standard to the water sample. Perform the desired measurement with your test and determine the measured value M.
2.) The target value S after adding the standard is 2 mg/l nitrate or approx. 0.2 mg/l phosphate. If the measured value M corresponds to the target value S, the test is still fully functional. If the measured value M deviates by more than 50-75% from the target value S, we recommend not using your test any more. The reagents have probably lost their activity.
3.) Calculation of the correction factor K.
If the deviation is less than 50-75%, you can calculate a correction factor K using the following formula: K = S / M
