Indian Council of Agricultural Research
(Agricultural Knowledge Management Information System)

ICAR-Central Agroforestry Research Institute, Jhansi, Near Pahuj Dam, Gwalior Road, Jhansi-284003 Uttar Pradesh (
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Instrument Details
Instrument/Facility Name: Elemental Nitrogen Analyzer
Make                                   : : Elementar Analysensysteme GmbH, Germany
Model                                  : rapid N exceed
Specification   :N: 0-500 mg abs. (0-100%), Standard deviation: <0.05% absolute (250 mg glutamic acid) Wt. approx. 65 kg, Dimension = 42X55X55 cm (WXDXH) Oxygen consumption: approx. 0.4 l/analysis, Required gas: CO2 and O2. Electrical connections: 100/110/200/230 V, 50/60 Hz, 1.8 kW.

Click to View1. High temperature combustion Dumas combustion method for N-Protein acc. to AOAC, DIN/ISO, EN and many international standards 2. Large weighing range Up to 1 g sample weight (1g organic matter) 3. Concentration range from ppm to 100% or 500 mg N abs. 4. Clean, safe, fast The analysis only takes a few minutes, no aggressive or toxic chemicals are used, CO2 as intelligent carrier gas 5. Easy installation requirements 48 x 55 cm benchtop space, 1 power supply (230, 110, 100 V), and two gases are sufficient for maintenance free long time operation 6. Multipoint calibration stable over months and matrix independent 7. Instrument control with a standard PC for perfect results also for unknown or heavily variable sample matrices, 21 CFR Part 11 functionality available. Possibility for remote service due to full digitalization of the instrument electronics

  Working Principles
Click to ViewDumas nitrogen determination requires well homogenized samples, heated in a high-temperature furnace where the combustion takes place rapidly at over 1000 °C in the presence of pure oxygen. This produces mostly water, carbon dioxide and nitrogen as several oxides (NyOx). This gas mixture (most water is removed) is passed through a reduction chamber containing copper heated to around 650 °C. This converts nitrogen oxides into elemental nitrogen and collects the oxygen in excess. Different traps remove the residual water and carbon dioxide. Total nitrogen content is measured by a thermal conductivity detector.

  User Instructions
Soil, Plant, Food and Beverage, Food supplements, Animal feed and Pet food samples could be analysed.1. The installation site ventilation should be checked. 2. The replacement of heated tubes must be performed by gloves etc. 3. Wear Protective glasses when handling phosphorus pentoxide, sodium hydroxide and calcium sulphate. 4. For routine maintenance work, follow the user manuals strictly.

  Contact Us
Contact No. 0510-2730214
Email Id

  Elemental Nitrogen Analyzer Charges
Procedure Name
National LAB/R&D

Additional Rs 100/-towards postal charges if result are to be posted
The Demand Draft should be in favour of "ICAR-CAFRI UNIT, Jhansi-284003"
Letter, DD & Samples send to "Director, ICAR-CENTRAL AGROFORESTRY RESEARCH INSTITUTE, GWALIOR ROAD, Jhansi-284003 (U.P.)"