Skip to Content

    HOME  /  APPLICATIONS & TECHNIQUES  / 

  1. Analytical chemistry Element analysis
  2. CN 802 Carbon Nitrogen Elemental Analyzer
Share
VELP

CN 802 Carbon Nitrogen Elemental Analyzer

Reference: VEL-F30800090

https://www.analis.com/web/image/product.template/123387/image_1920?unique=689d05d

Fast and simultaneous Carbon Nitrogen analyses

The CN 802 is a robust and flexible combustion analyzer, that works following official reference methods for the determination of carbon and nitrogen in many industrial sectors such as agriculture, environmental, food & feed, and chemical.

The proprietary CNSoftTM software powers the CN 802 and produces unsupervised, simultaneous results in 5 minutes of: 

  • 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 that does not require aggressive chemicals or time-consuming analysis steps. Just prepare your sample and walk away! 

Just set your next analysis and access a wealth of information from the sample!

CN 802 Working Process

VELP CN 802 Working Process

The sample is purged with a carrier and drops down into the combustion reactor where it is converted into its elemental compounds at a high temperature (above 1000°C). 
 
Water separation is performed in 2 steps. The combustion gases are carried to the first maintenance-free physical trap DriStepTM (WT1), strategically placed after combustion, trapping 99% of water. Secondly, a chemical trap (WT2) ensures complete removal of the remaining 1% of water. 
 
The combination of high temperature and the exclusive VcopperTM reduces nitrogen dioxide to molecular nitrogen inside the reduction furnace.
 
The VELP HighSensIR detector enables analysis of an extremely wide carbon concentration range, from just a few ppm up to 150 mg of absolute carbon, from micro to macro applications.  
 
Then, Auto-regenerative CO2 absorbers trap carbon dioxide, allowing the exclusive TCD (Thermal Conductivity Detector) to detect 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

    Related accessories, consumables & products

    NDA 702 Dumas Nitrogen Analyzer
    VELP

    NDA 702 Dumas Nitrogen Analyzer

    Reference : VEL-F30800080

    The perfect solution to maximize your productivity

    NDA 702 Dumas elemental analyzer is the best solution for high throughput labs looking for a fast and safe analyzer with the possibility to choose between Helium and Argon as carrier gas. 

    The NDA 702 is powered by the DUMASoftTM software and produces N/Protein results in just 3 to 4 minutes totally unsupervised and cloud-enabled. 
     
    NDA 702 is dramatically faster, easier, and safer than a traditional Kjeldahl system. 

    The NDA 702 is a safe analyzer that does not require aggressive chemicals or time-consuming analysis steps, just prepare your sample and walk away!

    NDA 702 Nitrogen Analyzer Working Principle

    VELP NDA 702 Nitrogen Analyzer Working Principle

    The Dumas method starts with the combustion of the sample which takes place inside the VELP combustion furnace (CF) at a temperature higher than 1000°C to obtain elemental compounds. 

    Water separation is performed in 2 steps in the NDA 702. The first is the maintenance-free physical trap DriStep™ (WT1) strategically placed after combustion and the second is a chemical trap (WT2) that ensures the complete elimination of residual 1% of water.

    Between the two traps, the flow of gases passes through the reduction furnace (RF) where NOX  compounds are transformed into molecular nitrogen N2.

    Afterwards, the CO2 is trapped by the unique self-regenerating VELP CO2 adsorbers. 

    At this point, elemental nitrogen is detected by the innovative thermal conductivity detector TCD LoGas™ which will send the data to DumaSoftTM to calculate the amount of Nitrogen and Protein. 

    Elemental Analysis and the Dumas Method

    The Dumas method, also known as the combustion method, is a primary method of determination of Nitrogen and Protein ensuring fast results, ease of use, and safety. However, it is considered an alternative to the classical Kjeldahl method. In fact, both of the methods are validated by different international organizations: Kjeldahl is officially recognized by AOAC, EPA, DIN, ISO, etc., whilst Dumas by AOAC, AACC, ISO, DIN, ASBC, AOCS, OIV, etc. Nevertheless, in some countries, the local guidelines recommend one method rather than the other.
    The Dumas method for nitrogen determination, developed in 1831, is older than the Kjeldahl, 1883, but more convenient in many aspects such as speed, safety, cleanliness, productivity, and cost per analysis.
    The problem in the past was that it was not easy to reproduce the conditions required by the Dumas method and for this reason, the Kjeldahl technique took the lead and became considered as the classical method for nitrogen/protein determination.
    Nowadays, thanks to steps forward in technology, the Dumas nitrogen determination is becoming more widespread.
    EMA 502 Elemental Micro Analyzer CHNS-O
    VELP

    EMA 502 Elemental Micro Analyzer CHNS-O

    Reference : VEL-F30800100

    The all-in-one CHNS/O solution to broaden your analytical potential

    EMA 502 Elemental Analyzer CHNS-O is the accurate and reliable solution for the determination of carbon, hydrogen, nitrogen, sulfur, and oxygen in various industrial sectors such as pharma and life science, organic chemistry, petrochemistry and energy, environmental, agronomy, food & feed.

    EMA 502 [ref VEL-F30800100]  Elemental analyzer for Carbon, Hydrogen, Nitrogen, Sulphur determination with option for Oxygen includes:
    Start-up kit, cables for balance & PC, software, 30-position disc autosampler, kit for approx. 1000 analyses, Argon option, 1-year ERMES license

    CHNS-O analysis with EMA 502 Elemental Analyzer helps determine the structure of an unknown compound, as well as evaluate the structure and purity of a synthesized compound. 

    Working in accordance with official reference methods, EMA 502 performs CHNS determination as well as Oxygen determination in just a few minutes, without requiring any add-ons or additional external modules.

    EMA 502 is a safe analyzer that does not require aggressive chemicals or time-consuming analysis steps. 

    Just set your next analysis and access a wealth of information from the sample!

    EMA 502 Elemental Analyzer working principle

    EMA 502 Elemental Analyzer working principle

    The CHNS analysis starts with the combustion of the sample inside the VELP combustion furnace at a temperature higher than 1000°C to obtain elemental compounds.

    VELP Vcopper™, a formulation of highly active copper powder, is placed in the lower part of the reactor to help the reduction of NOX into N2.

    The flow then reaches the gas chromatographic column oven, which ensures homogenous and modular temperature leading to a complete separation of all the elements for the final detection by TCD.

    When analyzing Oxygen, the sample undergoes pyrolysis inside the furnace and then passes through a chemical trap where all impurities are absorbed, before reaching the gas chromatographic column and the TCD for detection.