Solution «Kjeldahl Flexibility»

Nitrogen determination with greatest flexibility and convenience

You want to be flexible by using your products for classical Kjeldahl analysis also for related applications without time consuming changes. Our highly modular solution copes with semi-automated Kjeldahl applications as well as reflux digestion and direct distillation.

Tabs

Overview

Benefits

Highly flexible and convenient

Save money by using the same instruments for Kjeldahl and non-Kjeldahl applications. Combine dedicated accessories with integrated features and varying sample tube sizes.
Convenient operation thanks to automated procedures: programmable digestion temperature profiles, automated dilution, alkalization and optional acidification, followed by titration, calculation and aspiration of chemicals.
Meeting changing needs with ready-to-use pre-programmed methods for various sample matrices and storage of 50 personalized methods.

Fast

Large digestion time savings of up to 135 minutes. Fast heating and cooling by means of infrared heaters. Optional continuous addition of H₂O₂.
Concerted online titration with dedicated titrators while the sample is still being distilled. Automated calculation and result transfer.

Safe and secure

Maximum safety thanks to perfectly sealing joints and the ultimate four stage Scrubber K-415 (QuadScrub^ECO).
Unauthorized process or data manipulation can be prohibited by password protection of the KjelFlex K-360.

Voice of the customer

“The unit provides fast and accurate results. The operational procedure is very easy and cuts labour costs.”

Chinese Agricultural Institute

Scope

Service & Support

Comprehensive list of reference applications
Customized application support
Authorized IQ, OQ and PQ documentation
Useful tools for application development
Practical workshops, trainings and seminars
Preventive maintenance including IQ/OQ/PQ
Minimize downtime thanks to our service hotline

Applied products

SpeedDigester K-439

Scrubber K-415

KjelFlex K-360

Accessories

Options

Selection of sample tubes

The SpeedDigester can flexibly be adapted to use three different sample tube sizes:
100 mL, 300 mL and 500 mL

Suction module types

Specific suction modules are available for aqueous samples and accelerated digestion. The standard suction module is appropriate for most other applications.

Reflux setup (water cooled)

This setup guarantees efficient reflux without the loss of volatile compounds, the main use is for trace metal determination by aqua regia digestion.

COD setup (air cooled)

COD determination according to DIN 380 409 Part 41 and ISO 6060. Sample tubes are compatible with the autosampler from Mettler Toledo for automated COD analysis.

Scrubber ECO models

With the automatic cooling water control (^ECOmodels) the running costs and water consumption can be reduced.

Titration set

Different titrator models can be connected to the KjelFlex K-360 to increase the level of automation. With the titrator connected the titration step is triggered automatically when the distillation is complete.

Acid resistant pump

Some non-Kjeldahl applications require the addition of an acid to the sample prior to the distillation process. With the optional acid resistant pump adding the acid can be automated.

IQ/OQ Documentation

Installation/Operational Qualifications documentation often important when compiling with GMP/GLP.

Consumables for Kjeldahl

BUCHI offers not only high quality instrumentation but also approved consumables that are tested for the most common reference applications.

Kjeldahl Tablets, weighing boats, indicator, buffer solutions, potassium chloride and reference substances for fast digestions, proper operation and reliable qualification are available.

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