Next level nitrogen and protein analysis in food
Grow your business with our analytical solutions
Nitrogen and protein determination is an essential step in the development and production of food products. But time-consuming sample preparation, long analysis procedures, difficult to handle instruments, and tedious maintenance work can be a real bottleneck in nitrogen and protein analysis - especially when you have a lot of samples to be analyzed. The result: your R&D and quality control departments do not work as efficiently as they could, unnecessarily slowing down the production process of your food products. It doesn't have to be that way!
Let us help you grow your business
Our mission is your success. Incorporating 125 years of experience in elemental analysis, we support agricultural and food production businesses world-wide in creating high quality foods. Let our Dumas combustion analyzers bring your nitrogen and protein analysis to the next level, supporting process optimization and growth of your business. Learn how.
Kjeldahl vs. Dumas: A comparison of methods for nitrogen determination
There are two recognized methods for determining the nitrogen content in a sample, which have coexisted for over 140 years: Nitrogen determination according to Kjeldahl and nitrogen determination according to Dumas.
Kjeldahl method
In the Kjeldahl nitrogen method, the sample is chemically digested with concentrated sulfuric acid and a catalyst at 420 °C for 90 minutes, converting the nitrogen in the sample to ammonium sulfate. Sodium hydroxide is then added to the ammonium solution. The ammonia that is released is then distilled and transferred to a boric acid solution. This is followed by titration with sulfuric or hydrochloric acid for quantitative determination of nitrogen. The protein content can then be calculated using a specific conversion factor.
Dumas method
The Dumas method of nitrogen determination is based on combustion of the sample at a minimum of 950 °C in an oxygen-enriched environment. During combustion, all the nitrogen in the sample is converted to nitrogen oxides, which are then reduced to nitrogen and quantified using a thermal conductivity detector. The protein content can then be calculated using a specific conversion factor.
With the Dumas method of nitrogen determination, the analysis time per sample is four to five minutes, i.e. results (even for individual samples) are available more quickly than with the Kjeldahl method. This makes the Dumas method much more suitable for monitoring and optimizing processes and making timely decisions. In a normal working day, up to 200 samples can be measured with the Dumas method - twice the number of samples as with the Kjeldahl method (see Figure 1). Due to the high degree of automation, samples can be run unattended after weighing: up to seven hours of unattended operation is possible, allowing the operator to focus on other tasks in the laboratory.
Are you looking for the most efficient and accurate method for nitrogen and protein determination? Download now to make an informed decision and optimize your lab’s performance!
DOWNLOAD YOUR COPY
Fill in the form to receive your download link by e-mail.
By clicking on the "Subscribe" button, I consent to the receipt of personalized newsletters via e-mail by Elementar Analysensysteme GmbH and its group companies companies as well as the evaluation of my user behavior in this regard and - if available - the merging of this data with my data in our customer database. In order to receive newsletters from our group companies, it is necessary to transfer your above-mentioned personal data to these companies. We point out that these are partly located in so-called unsafe third countries outside the EU/EEA , in which no adequate level of data protection (e.g. by adequacy decision of the EU, Art. 45 GDPR) is guaranteed. In these countries, you may not be able to enforce your rights as a data subject, or only to a limited extent. In addition, it is possible that local government agencies access your data to a disproportionate extent. The transfer of data to these recipients is therefore only legitimized by your consent pursuant to Art. 49 (1) lit. a) GDPR, which you grant with your subscription. The newsletter can be unsubscribed at any time with effect for the future as well as my consent to the third country transfer can be revoked at any time. A revocation does not affect the lawfulness of the processing carried out on the basis of the consent until the revocation. For further information, please refer to our privacy policy.
Take your nitrogen and protein analysis to the next level - with analyzers from Elementar
Flexible: Analysis along the whole supply chain
Perform nitrogen and protein analysis along the whole supply chain of food in a wide range of sample matrices - whether it's solid, liquid, or pasty samples up to 5 g sample weight.
Cost-effective: Lowest cost per sample
Thanks to the resource-saving EAS REGAINER® technology and the use of Argon or CO2 as alternative carrier gases, our analyzers are especially cost-effective, making you independent of raising helium prices.
Eco-friendly: No toxic chemicals, low on resources
Thanks to the Dumas combustion method and our EAS REGAINER® technology, our analyzers are eco-friendly and resource-saving. Operation is easy and non-hazardous - even for unskilled users.
Easy to use: Fully automated and digitized
Nitrogen and protein analysis has never been easier: Our analyzers are fully automated and digitized, allowing you to save time and labor. In addition, pre-filled tubes and easily accessible components ensure quick and easy maintenance routines.
Maximum performance for nitrogen and protein analysis in food
Our nitrogen and protein analyzers rapid MAX N exceed and rapid N exceed® provide rapid and automated nitrogen and protein determination with highest precision and accuracy - ideal for the use along the whole food supply chain, from raw ingredients to end products. Based on high-temperature combustion according to Dumas (compliant to all relevant norms like ISO, AOAC, AOCS, ASBC, ICC, EBC, etc.), our analyzers are especially eco-friendly and safe to work with as no toxic chemicals are used and no toxic waste is produced. Thanks to our resource-saving EAS REGAINER® Technology, our analyzers ensure a cost-effective and eco-friendly nitrogen and protein determination in your solid, pasty, or liquid samples. Click on the "+" buttons below to learn how you can benefit from our analytical solutions.
rapid MAX N exceed
The rapid MAX N exceed nitrogen and protein analyzer offers increased laboratory efficiency at significant lower price per sample. Designed for 24/7 unattended operation, this analyzer addresses the needs of any high-throughput laboratory facing a wide range of sample types and weights (up to 5 g).
rapid N exceed®
The rapid N exceed® nitrogen and protein analyzer offers fast (3-4 minutes) and cost-effective nitrogen and protein determination of samples up to 1.5 g. The instrument realizes the lowest cost per sample in nitrogen and protein analysis and stands for absolute precision and high detection sensitivity.
Experience rapid MAX N exceed in the laboratory
Nitrogen and protein analysis along the whole food production process
Applications
What our customers say
Our nitrogen and protein analysis team is here for you
You want to learn more about our solutions for protein analysis in food? Do you have questions or challenges and need an expert to provide straightforward support? Our team is ready to answer your questions.
Would you like to receive notifications about new Application Notes, whitepapers and the latest information on our solutions for nitrogen and protein analysis?
Subscribe to our newsletter and be always up-to-date.