Analytical instruments - VELP Scientifica
VELP Scientifica - Via Stazione, 16 - 20865 Usmate (MB) ITALY - Tel. +39 039 62 88 11 - Fax. +39 039 62 88 120
Analytical instruments - VELP Scientifica
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Nitrogen analyzer and elemental analysis

Dumas nitrogen analyzers will be the most used solutions for measuring elemental nitrogen on many kind of sample, thanks to their multiple savings and benefits.

The Dumas Nitrogen Analyzer offers the advantages of being easy to use and automate. It is also considerably faster than the Kjeldahl method, taking a few minutes per analysis, as compared to the hour or more for Kjeldahl. It also does not make use of toxic chemicals or eco-unfriendly catalysts.

The Dumas nitrogen determination is much easier to automate than Kjeldahl and the VELP Scientifica NDA 701 capitalizes on this. In fact, only the sample preparation requires some care and attention and VELP has even simplified this with the sample preparation device that enables liquid, paste and solid samples to be prepared using exactly the same method. The weight of samples prepared is automatically transmitted from the balance, making operation easy and ensuring accuracy of data transfer. Samples are placed in the autosampler (up to 4 discs, 30 positions each) that automatically feeds them to the analyzer. The operator is now free and can leave the unit until all analyses have terminated.
The whole analysis of a sample lasts 3-4 minutes with the Dumas Nitrogen Analyzer NDA 701.

VELP Dumas Nitrogen Analyzer NDA 701

VELP Scientifica NDA 701, Dumas Nitrogen Analyzer

The combustion chamber incorporates both very high temperature and very low temperature catalysts to ensure that all components of the sample are fully combusted. The choice of the special Vcopper™ reduced copper in the reduction chamber provides the maximum possible efficiency for this stage and unmatched resistance as the number of analysis that can be done with it is dramatically increased.

In addition, the VELP NDA 701 provides the highest precision on the market with the lowest detection limit (0.003 mgN). It is the best that you can get, being ideal for those difficult samples with a very low amount of nitrogen, especially in the environmental sector.

NDA 701 is completely controlled and managed by the PC, using the powerful DUMASoft™

Create a calibration curve suitable for your analysis!
Automatically, the DUMASoft™ will set the best analytical conditions according to the sample type. The dosing of gases is optimized by the DUMASoft™, in order to achieve complete combustion of the sample with minimum consumption.
Create calibration curves quickly, performing few analyses on different standard quantities (e.g. on EDTA, 9.57% N). Save and recall at every time the best suitable calibration curve according to the nitrogen/protein content of the sample, especially before starting the analysis.
No need to create a calibration curve every day!

Monitor constantly your instrument activities!
On the right side of the main window the user can continuously check the instrument status, monitoring the flow rate and the reactor conditions and temperatures.
Beneath the database, the real time graph shows the progress of the analysis, creating the peak as soon as the nitrogen starts reaching the innovative Thermal Conductivity Detector.
On the bottom the user can also read suggestions about maintenance, monitoring the number of analyses that can be performed before the next replacement.

Customize the test report according to your needs!
Once the analysis is completed, the user can create test reports for a single test or multiple analyses for a better interpretation of the data.
The user can also export data in .xls, .txt or .csv format to PC or LIMS and easily print the results.
Results can be recalculated using different calibration curves, without performing a new test, but only selecting the new curve!

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