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N/Protein Analysis


The determination of the total protein content is an essential tool for quality control and protein declaration according to international labeling laws in the food & feed industry and research facilities. Since the protein content can directly correspond to product properties, highly precise, matrix-independent protein analyses are required in all application areas.

SPRINT’s iTAG technology only tags the amino groups found in proteins. Fillers and other sources of non-protein nitrogen (NPN) are just ignored. Traditional protein measurement techniques like Kjeldahl and combustion (Dumas) cannot tell if the nitrogen present came from protein or other components.
SPRINT™ utilizes an automated protein-tagging technology that attaches to the protein itself for an accurate, direct measurement. A known amount of iTAG is added to the sample, the amount of iTAG that is bound to the sample is measured and this result is converted into the protein concentration.



Bioscience meets food science with CEM’s SPRINT™ Rapid Protein Analyzer for fast, accurate protein testing. This patent-pending system, which uses iTAG protein-tagging technology, identifies and measures only protein, not nitrogen, so you can be certain your results are accurate.

  • Measures directly only protein, not total nitrogen
  • Remarkably easy to use
  • No hazardous chemicals
  • Safer than Kjeldahl with better results
  • Green Method
  • Automates Official AOAC methods:
  • AOAC Method 2011.04
  • AOAC Method 967.12
  • AOAC Method 930.33
  • AOAC Method 930.29

  • Applications for SPRINT™ are:
    Protein in Yogurt, Greek Yogurt, Cottage Cheese, Sour Cream, Milk, Fluid Milk, Buttermilk, Half and Half, Chocolate Drink, Non-fat Dry Milk, Ice Cream, Cheese
    Beef, Pork, Chicken, Turkey, Hot Dog, Pepperoni, Hard Salami, Sausage

    View brochure Video

    Rapid N

    Rapid N Exceed

    Time to rethink protein analysis

    The Rapid N is a nitrogen/protein analyzer according to Dumas. In day-to-day business it performs routine analyses of food or feed up to 1 g sample weight in your laboratory. The rapid N exceed represents the fast, safe and environmentally friendly alternative to the classical Kjeldahl method.

    As the most innovative enterprise in the field of elemental analysis, Elementar takes this traditional analytical technology to a new level. This is made possible by a completely new method of reduction of nitric oxides and absorption of excess oxygen in the analysis gas. Due to a defined interaction of reduction and oxidation (patent applied for) used reduction agent will be automatically generated during operation. Thus, a reduction reactor (reductor) can be used for several thousand samples without change or maintenance. At the same time, Elementar relies on proven technology for the newly developed rapid N exceed: CO2 as carrier gas saves the finite resource helium and guarantees stable prices and constant availability.

    The fastest protein analysis with analysis times of less than four minutes and highest sample throughput in this instrument class.
    The post-combustion guarantees exact results, independent of any sample matrix.
    The rapid N exceed never takes a break: it operates 24/7 – 365 days a year.

    High temperature combustion
    Dumas combustion method for N/Protein acc. to AOAC, DIN/ISO, EN and many international standards

    Large weighing range
    Up to 1 g sample weight (1 g organic matter)

    Concentration range
    from ppm to 100% or 500 mg N abs.

    Multipoint calibration
    stable over months and matrix independent

    Clean, safe, fast
    The analysis only takes a few minutes, no aggressive or toxic chemicals are used. CO2 as intelligent 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

    Automated sample analysis
    with integrated sample feeder for 60 samples (80 or 120 sample positions optional) and PC control under Windows®

    Instrument control
    with a standard PC for perfect results also for unknown or heavily variable sample matrices, 21 CFR Part 11 functionality available. Possibility for remote service due to full digitalization of the instrument electronics

    View brochure Video

    Application Bulletins

    Analysis of nitrocellulose with the rapid N exceed®

    Determination of the N/protein content of grain products with the rapid N exceed

    Rapid N Max

    Rapid Max N Exceed

    MAXimum performance in protein analysis

    The rapid MAX N exceed is the first N/protein analyzer according to the Dumas method that utilizes the highly successful EAS REGAINER® technology also for larger sample weights. Designed for 24/7 unattended operation, the instrument addresses any high throughput laboratory facing a wide range of sample types and weights. The rapid MAX N exceed stands for outstanding precision, sensitivity and sample flexibility.

    Ease of use
    Save valuable time in sample preparation. The unique post-combustion technology ensures the complete digestion of even challenging species that are usually difficult to combust. Grinding or milling can therefore often be omitted without affecting reliable data quality

    Highest sample throughput
    The rapid MAX N exceed offers the fastest N/protein determination in 5 minutes. In conjunction with the 90 position autosampler it is possible to measure 300 samples per day. With the proprietary EAS REGAINER® technology it is possible now to run more than 1000 samples without the need to exchange reducing agent. Thus customers can enjoy outstanding low maintenance intervention for industry-leading system uptime.

    Sample flexibility
    The upright crucible design ensures an optimal combustion of any kind of liquid samples, such as milk, beer, soft drinks, juice, soy sauce, etc. Combined with the unique post-combustion technology a reliably high, matrix-independent data quality is achieved. Solid samples of 1 g can be measured with outstanding precision and accuracy.

    Measuring method
    High temperature combustion with 100% recovery and detection of the released nitrogen. 
For N/Protein “Dumas” analysis according to AOAC, DIN/ISO, EN and most relevant standards.

    Easy sample handling
    Direct weigh-in into re-usable crucibles (steel or ceramics) without any special pre-treatment. Suitable for solids or liquids up to several grams or milliliters.

    Safe, fast, clean
    The analysis takes only a few minutes. No aggressive or toxic chemicals required. Physical and chemical separation of water and and interfering gases.

    Large concentration range
    from 20 ppm to 100% or 500 mg absolute N content.

    Few operational requirements
    Less than 1 m laboratory working space, 1 electrical connection and 2 operating gases are sufficient for maintenance free long term operation. Operation with helium or argon carrier gas are standard.

    Fully automatic
    With integrated 90 sample changer, control through Windows® based operating software. Optional 21 CFR Part 11 compliant software.

    View brochure Video

    Application Bulletins

    Analysis of very low nitrogen contents in starch using the rapid MAX N exceed

    Determination of the N/protein content of animal feed with the rapid MAX N exceed


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    Other companies

    Beun-De Ronde b.v.
    BioSPX b.v.
    AddspeX b.v.


    Beun - De Ronde Serlabo

    Steenweg op/
    Chaussée de Ruisbroek 290b

    BE-1620 Drogenbos

    +32 (0)2 3342270