• Banner UNICUBE

    UNIQUE

    Carbon and nitrogen determination
    at trace levels

  • Banner UNICUBE

    SENSITIVE

    detection limit of 10 mg/kg

  • Banner UNICUBE

    UNFAILING

    10 years warranty on
    furnace and detector

UNICUBE® trace

Matrix independent determination of N and C at trace levels

The UNICUBE trace measures low level nitrogen and carbon concentrations in solids and highly viscous liquids with a detection limit of 10 mg/kg. Its specialty: nitrogen and carbon determination are carried out using the Dumas method, after removal of interfering gases during reduction and subsequent detection using a thermal conductivity detector. The UNICUBE trace combines the matrix independent Dumas method with high sensitivity.

Sample digestion is carried out by catalytic combustion at a temperature of 950 °C, the nitrogen and carbon containing components in the sample form a mixture of different oxides and N2. The resulting gases then pass through the reduction tube, where carbon compounds are safely reduced to CO2 and nitrogen compounds to N2. After removal of other combustion products like H2O and SO2, CO2 and N2 are 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.


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UNICUBE with monitor
UNICUBE with open door
Liquid samples
Combustion tube of UNICUBE
Close-up of UNICUBE
UNICUBE with furnace pulled out
Wrapped solid samples
Temperature Programmed Desorption (TPD) column