User Manual Q&AAnswer
Mar 02, 2025 - 07:44 PM
To adjust the pH of the sample prior to analysis using the MACHEREY-NAGEL TKN 16 NANOCOLOR Total Kjeldahl Nitrogen test, follow these steps:
1. Open test tube A.
2. Using a digital piston pipette, pipette 2 mL of the sample into the test tube.
3. Add 2 mL of reagent R1 to the test tube.
4. Seal the test tube and shake it vigorously.
5. Heat the test tube for 1 hour at 100 °C or for 30 minutes at 120 °C.
6. Take the tube from the heating block and allow it to cool to room temperature.
7. Add 1 NANOFIX compensation reagent to the test tube.
8. Seal the test tube and shake it vigorously.
Note: The pH adjustment step is not explicitly mentioned in the provided instructions. However, adjusting the pH of the sample within the range of 5-9 prior to analysis is recommended for accurate results. You can use a pH meter or pH indicator strips to measure and adjust the pH accordingly.
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