What is the Kjeldahl method?

The Kjeldahl method (the industry standard test used to routinely measure the crude protein content of foods) measures the total nitrogen content of a food, which is then used to estimate the crude protein content by applying a conversion factor to the result.

The Kjeldahl method is widely used internationally and is still the standard method for comparison against all other methods. Its universality, high precision and good reproducibility have made it the major method for the estimation of protein in foods.

How to choose the kjeldahl system?

For the determination of nitrogen using the Kjeldahl method Infitek provides three plans for the user individually configurable complete solutions for the laboratory

  • Economic and basic scheme

If the current laboratory budget is limited and a certain amount of samples still need to be tested every day, the KJA-9860 Automatic Kjeldahl Analyzer will become the preferred instrument.KJA-9860Automatic Kjeldahl Analyzer can perfectly replace Kjeldahl flask + electric furnace + manual titration, and the instrument automatically recognizes the titration end point, which can avoid errors caused by human eye observation.The distillation titration time of a single sample is shortened to 6-10 minutes, which can not only ensure the accuracy of the experimental results, but also improve the experimental efficiency.

Recommended configuration: KJA-9860Automatic Kjeldahl Analyzer, KJD-420F Kjeldahl Digestion System, KJD-WGH Waste Gas Collection Hood（including water jet vacuum pump）

  • Standard configuration scheme

If the current laboratory budget is relatively sufficient, the daily testing sample volume is large, and the staffing is limited, then the KJA-110 Automatic Kjeldahl Analyzer will save the heavy experimental labor and bring accurate experimental results.KJA-110 Automatic Kjeldahl Analyzer, on the basis of KJA-9860 Automatic Kjeldahl Analyzer, has made a full range of configuration upgrades. The titration precision is higher and the results are more accurate; the software and hardware functions are more powerful and the experience is more comfortable. In particular, the KJA-110 Automatic Kjeldahl Analyzer has added the function of titration while distillation, which shortens the distillation titration time of a single sample to 5-6 minutes.

Recommended configuration: KJA-110Automatic Kjeldahl Analyzer, KJD-420F Kjeldahl Digestion System , KJD-WGH Waste Gas Collection Hood ,KJD-SCB Exhausting System.

  • Intelligent and efficient scheme

If the current laboratory budget is sufficient, but the staffing is limited and the test sample volume is large, the KJA-1160 Automatic Kjeldahl Analyzer will become the first choice.The KJA-1160 Automatic Kjeldahl Analyzer is based on the accuracy, stability and convenience of the KJA-110, and has unique features such as intelligence, high efficiency, energy saving, and data sharing.Equipped with titration while distilling and variable speed titration technology, which reduces the experiment time by more than one third;The batch testing function simplifies the operation of batch samples and reduces the test time;With permission grading function, which can realize data traceability;The titration image is displayed in real time and the entire experimental process is monitored online, which can adjust the experimental method in real time and improve the test accuracy and efficiency.

Recommended configuration: KJA-1160Automatic Kjeldahl Analyzer, KJD-420FKjeldahl Digestion System ,Waste Gas Collection Hood（including water jet vacuum pump）, KJD-SCB Exhausting System, KJA-1124 Autosampler.

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