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Views: 0 Author: Site Editor Publish Time: 2025-05-15 Origin: Site
Nitrogen content in organic and petrochemical samples influences product performance, regulatory compliance, and application suitability. The Nitrogen Content Tester by Changsha Friend Experimental Analysis Instrument Co., Ltd. delivers precise, repeatable measurements based on established micro‑Kjeldahl or Dumas combustion methods.
In fuels, high nitrogen can lead to NOₓ emissions; in polymers and pharmaceuticals, it affects chemical functionality. Rigorous testing supports formulation control, environmental reporting, and quality assurance.
Micro‑Kjeldahl: Samples are digested in sulfuric acid, neutralized, distilled, and titrated to quantify ammoniacal nitrogen.
Dumas Combustion: Samples are combusted in an oxygen atmosphere; the resulting nitrogen oxides are reduced to N₂ and measured via thermal conductivity.
Changsha Friend instruments offer modules for both approaches, with automated workflows that minimize manual steps and exposure to reagents.
Automated digestion block: Heats multiple samples uniformly, reducing variation.
High‑precision titration or GC detection: Ensures low detection limits (< 10 ppm).
Integrated data management: Logs results, calculates concentrations, and exports reports.
Safety interlocks: Protect users during high‑temperature or high‑pressure operations.
Fuel testing: Controls NOₓ precursors in diesel and gasoline.
Food and feed: Ensures protein content meets nutritional labeling requirements.
Pharmaceuticals: Verifies active ingredient purity.
Polymers: Monitors resin chemistry for product consistency.
Use certified reference materials for calibration, follow manufacturer‑recommended acid‑to‑sample ratios, and perform regular blank runs to check for contamination. Proper ventilation and adherence to chemical‑handling guidelines safeguard laboratory staff.
