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VELP

CN 802 Carbon Nitrogen Elemental Analyzer

Reference: VEL-F30800090

https://www.analis.com/web/image/product.template/123387/image_1920?unique=5fa379c

Fast, simultaneous carbon and nitrogen analyses

The CN 802 is a robust, flexible combustion analyzer that follows official reference methods to determine carbon and nitrogen across many sectors: agriculture, environmental, food & feed and chemical.


The proprietary CNSoft™ software powers the CN 802 and delivers unsupervised, simultaneous results in 5 minutes for:

  • TC: Total Carbon
  • TOC, TIC: Total Organic and Inorganic Carbon (after acidification)
  • TN: Total Nitrogen
  • C/N Ratio


The CN 802 is a safe analyzer with no aggressive chemicals or time-consuming steps: just prepare your sample and walk away.


Set your next analysis and get a wealth of information from the sample.


CN 802 Working Process

VELP CN 802 Working Process

The sample is purged with a carrier gas and drops into the combustion reactor, where it is converted into elemental compounds at high temperature (above 1000 °C).


Water is separated in two steps. The combustion gases first reach the maintenance-free physical trap DriStep™ (WT1) after combustion, trapping 99% of the water; a chemical trap (WT2) then removes the remaining 1%.


High temperature combined with the exclusive Vcopper™ reduces nitrogen dioxide to molecular nitrogen in the reduction furnace.


The VELP HighSensIR detector covers a very wide carbon range, from a few ppm up to 150 mg of absolute carbon — from micro to macro applications.


Auto-regenerating CO2 absorbers then trap carbon dioxide, letting the exclusive TCD (Thermal Conductivity Detector) measure the nitrogen content.


    This combination does not exist.

    CN 802 Carbon Nitrogen Elemental Analyzer

    Technical information

    Method of analysis:

    Carbon/Nitrogen determination according to the combustion method

    Analysis time:

    3/5 minutes 

    Detector:

    N = TCD (Thermal Conductivity Detector)
    C = HighSensIR Detector (Non-Dispersive Infrared)

    Sample weight:

    Up to 1 g

    Autosampler type

    Electronic

    Autosampler capacity:

    Up to 4 discs, 30 positions each (up to 117 samples)

    Reproducibility (RSD):

    < 0.5% for EDTA standards approx. 100 mg

    Recovery:

    > 99.5%

    Detection Range C:

    ppm up to 150 mg abs. (or 100 %)

    Detection Range N:

    ppm up to 200 mg abs. (or 100 %)

    Official references:

    ISO 10694; EN 16168; EN 15936; ISO 20236; AOAC 993.13; ISO 20620; ISO 13878; EN 13654-2, EPA Method 440.0, etc.

    Combustion temperature:

    1100 °C / 2012 °F

    Carrier gas:

    Helium or Argon (grade 5.0)

    Combustion gas:

    Oxygen (grade 5.0)

    Connectivity:

    Ermes Cloud Platform via Wi-Fi or LAN connected to a PC

    Interfaces:

    USB

    Weight:

    54 kg / 119 lb

    Dimensions (WxHxD):

    655x510x410 mm (H 690 mm with autosampler)
     25.8x20.1x16.1 in (H 27.0 in with autosampler)

    21 CFR part 11 compliance:

    Yes, optional package available


    Related documents

    DOCUMENT NAME

    RELEASE DATE

    DOWNLOAD

    VELP-Bochure-CN802
    23 / 12 / 2024
    Download icon Download

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    NDA 702 Nitrogen Analyzer Working Principle

    VELP NDA 702 Nitrogen Analyzer Working Principle

    The Dumas method begins with combustion of the sample in the VELP combustion furnace (CF), above 1000 °C, to obtain elemental compounds.


    Water is separated in two steps: first the maintenance-free physical trap DriStep™ (WT1) placed right after combustion, then a chemical trap (WT2) that removes the remaining 1% of water.


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    Elemental Analysis and the Dumas Method

    The Dumas method (combustion method) is a primary method for determining nitrogen and protein, offering fast results, ease of use and safety. It is considered an alternative to the classical Kjeldahl method. Both are validated by international bodies: Kjeldahl is recognized by AOAC, EPA, DIN, ISO and others, and Dumas by AOAC, AACC, ISO, DIN, ASBC, AOCS, OIV and others. In some countries, local guidelines recommend one method over the other.

    The Dumas method for nitrogen determination (1831) is older than Kjeldahl (1883) but more convenient in many ways: speed, safety, cleanliness, productivity and cost per analysis.

    In the past, the conditions the Dumas method requires were hard to reproduce, so Kjeldahl took the lead and became the classical method for nitrogen/protein determination.

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    Reference : VEL-F30800100

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    EMA 502 Elemental Analyzer working principle

    EMA 502 Elemental Analyzer working principle

    CHNS analysis begins with combustion of the sample in the VELP combustion furnace, above 1000 °C, to obtain elemental compounds.


    VELP Vcopper™, a highly active copper powder, sits in the lower reactor to help reduce NOx to N2.


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