The determination of total nitrogen and protein content is crucial for food, grains, dairy products, fertilizers, animal feed, plants, tobacco, and related products. The traditional Kjeldahl nitrogen determination method has been implemented as an industrial standard for many years, but it has complex operating steps, long time consumption, the use of corrosive acids, difficulty in quantitatively converting organic matter into ammonia, and severe environmental pollution, making it difficult to meet the current needs of detection development. In the past decade, a fast, accurate, low-cost, pollution-free, and highly automated nitrogen determination method has been widely used in European and American countries, becoming an alternative to the Kjeldahl method,

That is, the Dumas combustion nitrogen determination method.

The Dumas method has been recognized by many organizations, such as: AOAC, ASBC, EBC, AACC, and ISO have become legal nitrogen/protein analysis methods. In some areas of the United States, Canada, and Germany, the Dumas method is even used as the only nitrogen standard. Chinese national standards GB/T5009.5-2010 Determination of protein in food, GB/T24318-2009 Determination of total nitrogen content and calculation of crude protein in feed raw materials by Dumas combustion method, SN/T2115-2008 Detection method for total nitrogen and crude protein in imported and exported food and feed, GB 29518-2013 Diesel engine nitrogen oxide reducing agent

The successive introduction of Dumas combustion methods such as urea aqueous solution (AUS 32) marks the official recognition and promotion of Dumas combustion method for nitrogen in China.

The entire testing process only takes a few minutes, and the instrument is equipped with an automatic sampler for 100 sample grades. Through a vertical sampling system from bottom to top and a reusable crucible, the sample can be directly injected for analysis without the need for tin foil wrapping, reducing operating costs and eliminating the need for tedious sample preparation.

The upper furnace structure (combustion furnace located at the top of the sampler) automatically carries away the ash content of the sample in the furnace during the analysis process, without the need for ash content treatment and maintenance of the sample in the furnace. Built in 1200 ℃ combustion furnace and 750/600 ℃ dual temperature zone oxidation/reduction furnace system make combustion oxidation more complete and obtain more accurate analysis results. Third level dehydration has extraordinary liquid sample analysis capabilities. Built in 40 ℃± 0.1 ℃ constant temperature device ensures the constant temperature state of system detectors, splitters, gas collection systems, gas path control devices, etc., avoiding changes in gas flow path stability caused by environmental temperature changes and improving the stability of analysis. The instrument is equipped with a built-in touch screen display (which displays real-time temperature, detector signal values, flow rate, and measurement time information of the combustion furnace/reduction furnace/detector/electronic condenser/constant temperature box, etc.), ensuring error free analysis and a more intuitive analysis process.

The PrimacsSN100 Dumas combustion analyzer provides a more accurate, rapid, safe, economical, and environmentally friendly way to detect total nitrogen/protein.

Model Name: Primacs SN100 Combustion Method Fully Automatic Nitrogen Analyzer

Analysis project: Total nitrogen/protein

Method: TN is detected using high-temperature combustion TCD testing

Analysis scope: Nitrogen: 0.01-200mg N absolute valueMeasurement range: 0.01-100%

● Detection limit:< 0.01% (< 100 ppm)

●Sample weight: maximum 3g or liquid sample volume 2ml

Precision: Nitrogen ˂ 0.5%

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Data processing: Area calculation (multi-point linear regression), automatic input of balance interface data, storage of raw data and connection to LIMS

● Automatic sampler: 100 sample grade automatic sampler

Injection method: Vertical injection system from bottom to top

● Instrument features: Balance interface data automatic input interface

The blowback system can prevent interference from environmental factors and is used for detecting low content samples

● Reusable crucible

Built in display, showing parameters such as temperature, flow rate, pressure, and instrument working status

The three-stage dehydration system completely eliminates the interference of moisture and reduces operating costs Can directly analyze liquid samples

Precise gas diversion device reduces the loss of reducing agent