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Your Complete Guide to Choose Your Next Kjeldahl Distillation Unit

In scientific research and quality control, few analyses are as pivotal as nitrogen and protein determination. Nitrogen, an essential element in organic compounds, serves as a fundamental indicator of nutritional content, environmental impact, and product quality across diverse industries. 

At the heart of nitrogen analysis lies the Kjeldahl method, a gold standard technique renowned for its precision, versatility, and reliability. With decades of expertise in analytical instrumentation and a commitment to innovation, VELP offers a comprehensive range of nitrogen and protein analysis solutions designed to meet the diverse needs of laboratories worldwide. From digestion systems to advanced distillation and titration units, VELP empowers researchers and quality control professionals to achieve precise and reliable results with ease. 

In this context, five UDK Series models are available with different automation levels to match any laboratory requirements. They are designed to work in accordance with international standards: Total Kjeldahl nitrogen (TKN), proteins, ammoniacal nitrogen, nitric nitrogen (Devarda), phenols, TVBN and volatile acids, cyanides, and alcohol content.

Common key product features

Common key product features
Patented and maintenance-free steam generator
The system works without pressure for maximum safety; the steam output is very stable ensuring repeatability of analyses.
▶ Efficient thermal exchange with the patented titanium condenser 
Higher performance - the distillate temperature always remains below the safe threshold value (35 °c) - and considerable water saving (from 0.5 l/min).
Unmatched resistance with the technopolymer splash head
Highest chemical resistance for the longest durability (up to 10,000 analyses).  
Multi-tasking software and premium connectivity
7” touch screen with easy-to-use and intuitive software plus premium connectivity options and cloud-based services. 
Achieve compliance to 21 CFR part 11
Upgrade the software and comply with FDA regulations.

Automatic distillation and titration unit with autocarousel

Automatic distillation and titration unit with autocarousel
The UDK 169 is a fully automated distiller with an integrated colorimetric titrator for premium performance and continuous operation. It offers the highest sample throughput available when connected to the AutoKjel autosampler. Just load your samples and walk away: the system will carry out an analysis of all samples unattended and store the results. 

YOUR BENEFITS AT A GLANCE
▶ Fully automatic process: distillation and titration performed simultaneously
▶ Premium result accuracy and precision thanks to the integrated colorimetric titrator
▶ Shortest time-to-results with online titration and automatic results calculation
▶ Selectable steam generation output level 10% – 100% and automatic addition of reagents
▶ Auto removal of residues from titrator & sample tube
▶ Clear and intuitive operations thanks to the Smart User Interface and the 7” digital display
▶ Connection to ERMES Cloud Platform

Automatic Kjeldahl analyzers

Automatic Kjeldahl analyzers

The UDK 159 and the UDK 149 are VELP fully automatic Kjeldahl analyzers: they combine all the advantages of a fully automatic distillation with the added benefits of a fully automatic titration

YOUR BENEFITS AT A GLANCE
▶ Fully automatic process, with distillation and titration performed simultaneously: 
- UDK 159: integrated colorimetric titration (AOAC-approved)
UDK 149: external potentiometric titration
▶ Premium result accuracy and precision 
▶ Shortest time-to-results with online titration and automatic results calculation
▶ Selectable steam generation output level 10% – 100% and automatic addition of reagents
▶ Auto removal of residues from titrator & sample tube
▶ Clear and intuitive operations thanks to the Smart User Interface and 7” digital display
▶ Connection to ERMES Cloud Platform


Semi-automatic distillation units

Semi-automatic distillation units
The UDK 139 and the UDK 129 are semi-automatic distillers ideal for managing low-medium throughput requirements for a wide range of laboratories looking for a reliable instrument with limited automation. 

YOUR BENEFITS AT A GLANCE
▶ The semi-automatic process ensures efficient operations
▶ Intuitive interface for easy analysis settings (7” digital display on the UDK 139)
▶ Auto removal of residues from the sample tube
▶ Maximum safety for the operator
▶ Chemically-resistant technopolymer housing
▶ Lever operation simplifies tube insertion/removal
▶ Unmatched flexibility with a wide accessory range
▶ Selectable steam generation output level 10% – 100% (only UDK 139)
▶ Connection to ERMES Cloud Platform (only UDK 139)

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