according to Dumas method
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.
The rapid MICRO N cube is optimized for nitrogen determination at trace levels.
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
stable over months and matrix independent
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
Electronic micro balance:
balance and elemental analyzer form a system. We offer micro balances and analytical balances from the leading manufacturers with our instruments.
alternative carousels are available for larger samples with a volume up to 1 cm3
for the dosing and gas tight sealing of tin capsules for liquid and sensitive samples.
vario Liquid Sampler, VLS:
The VLS automated sample feeder is used for liquid injections directly into the combustion chamber.
Manual gas/liquid injection:
for the injection of liquid or gaseous samples via a septum free injector port and a micro-syringe.
Sample former with pressing tool:
for the compaction of the wrapped samples and removal of air in soil samples.
Manual pressing tool:
for the manual compaction of the wrapped sample.
Our kits of consumables contain all necessary parts and chemicals for the corresponding mode, such as combustion/reduction tubes, all chemicals and instrument specific wear parts. We do not compromise on quality of the used parts and chemicals – this is the prerequisite of a guaranteed long lifetime of our instruments.
Kits of consumables for approx. 4000 analysis
Everything you need for carefree sample analyses.
Kits with small wear parts:
useful combination of the most important O-rings and fuses for the laboratory.
Of course all the consumables can also be ordered separately.