Solution «Kjeldahl Basic»

Nitrogen determination fulfilling basic needs

You look for a cost-effective product for basic nitrogen determination according to Kjeldahl with straightforward operation. We provide an entry-level solution with little need for sophisticated programming or automated titration but with various options to extend the scope of applications.

Tabs

Overview

Benefits

Cost-effective

Entry level solution for basic Kjeldahl applications with little need for automation and documentation.
More than two hours faster digestion: rapid heating and cooling with IR digestion and further optional acceleration with continuous H₂O₂addition.
Flexible multipurpose use for reflux digestion even with varying sample tube sizes. Optional automated acidification and gentle distillation by using the Distillation Unit K-355.

Easy to use

Straightforward operation without programming.
Quick and easy use with the SpeedDigester K-425 for reflux or H₂O₂ digestion.
Flexible use of varying sample tube sizes.

Safe and sound

Keeping the lab atmosphere free of harmful fumes using the Scrubber K-415 (DuoScrub). Ultimate sealing of BUCHI’s precise tube joints with the tight suction modules.
Excellent reproducibility thanks to superb thermal homogeneity and process supervision (RSD < 1%).
Thorough process and operator safety with sensors for tube detection, cooling water (Distillation Unit K-355), protective and service door.

Voice of the customer

“Since the system is automated, other jobs in the laboratory can be done while digestion is taking place. The distillation unit has also shown to give good recoveries and precision.”

P. Shah, Analytical chemist

Butterworth Laboratories, United Kingdom

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

Scrubber K-415

SpeedDigester K-425 / K-436

Distillation Unit K-350 / K-355

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.

Condensate vessel

Easy evaporation of water samples (TKN) is possible using the dedicated TKN vessel with stopcock, which is available alongside the standard 1 L condensate vessel

Scrubber ECO models

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

For specific reactions

The reaction step absorbs specific reaction gases e.g. NO_x

Glass splash protector

With its extensive know-how BUCHI provides state-of-the-art glass parts like the splash protector. The whole distillation process is visible for easy method development and process monitoring.

Plastic splash protector

This splash protector is made of glass fiber reinforced polypropylene. It is the choice for high throughput analysis due to its long lifetime.

K-355 with acid resistant pump

Some direct distillations require the addition of an acid to the sample prior to the distillation process. With the K-355 integrated 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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