rapid MICRO N cube
The rapid MICRO N cube measures low level nitrogen concentrations with a detection limit of 10mg/kg of a wide range of samples. Its specialty: nitrogen determination is carried out using the Dumas method, after reduction of the oxides of nitrogen the resulting N2 is measured using a thermal conductivity detector.
Until now such low level concentrations were measured via oxidation to NO followed by chemiluminescence detection, the disadvantage of this method is NO formation is matrix dependent which results in method error and the need for matrix dependent calibration. The rapid MICRO N cube offers the matrix independent Dumas method in combination with high sensitivity.
Samples digestion is by catalytic combustion at a temperature of 950°C, the nitrogen containing components in the sample form a mixture of N2 and oxides of nitrogen, other combustion products formed i.e. water, oxides for carbon and sulphur are chemically removed. The resulting gases then pass through the reduction tube, where they are safely reduced to N2 and measured by thermal conductivity detection.
The system is designed for easy, low maintenance operation; matrix independent analysis allows the use of a standard ‘universal’ calibration for any sample type. The front door of the analyzer opens to give excellent access for replacement of consumables exchange of combustion and reduction tube is particularly easy due to the slide out furnace.
Elementar gives a 10 year warranty on both the furnace and thermal conductivity cell, thus emphasizing the stability of the system.
High temperature combustion
quantitative sample digestion at up to 1200 °C – with ten years furnace warranty.
Complete conversion of all N components into N2.
Jet injection of oxygen directly to the sample leads to highest oxygen concentrations at the point of combustion whilst minimizing gas consumption.
Largest weighing range
from micro (<1 mg) to macro (800 mg soil) sample weight, depending on requirements up to 20 mg organic matter
Largest dynamic range of element concentrations and element ratio
up to 7 mg C abs. or 10 mg N abs. (or 100%, depending on analysis mode and sample matrix), from ppm to 100%, LOD 10 ppm N
Multipoint calibration
stable over months and matrix independent
Instrument control
Controlled by Windows ‘professional’ PC for perfect results also for unknown or heavily variable sample matrices with integrated sample feeder for 120 samples, 80 place is available on request.
21 CFR part 11 functionality available. Possibility for remote service due to full digitalization of the instrument electronics
One basic instrument for all applications
No expensive special catalysts, easy ash removal from the combustion tube and long lifetime of all components are the basis for a low cost of ownership
Clean, safe, fast
The analysis only takes a few minutes, no aggressive or toxic chemicals are used, Helium carrier gas
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
