KjelMaster K-375

Free choice of methods at perfect usability

We provide solutions for both potentiometric and colorimetric titrations. The KjelMaster K-375 meets the highest demands in usability, automation, user administration and sophisticated data management.

Tabs

Overview

Benefits

Comprehensively safe

Compliant and flexible plug-and-measure titration concept (colorimetric / potentiometric)
Safe operation, user protection and guided routine operation
Different access levels of authorization according to GLP requirements
Reproducible results with the smart distillation mode “IntelliDist”
Data security supported by intelligent software

Safe and convenient

Intuitive operation via the large graphical color touch screen (8.4”)
Simple LIMS integration and traceable data recording
No errors in routine operations by the sophisticated KjelLink PC software
Optimal and stable working conditions by self-adjusting cooling water control

Proven

Shortest time-to-result due to well synchronized process steps
Upgrade onsite for highest sample loads by connecting the KjelSampler
Fully automated workflow for high sample loads
Automatic data exchange with complementary peripherals

Product video

Voice of the customer

“The highlight of BUCHI’s automated Kjeldahl system is the 48 position autosampler that allows us to work in a continuous way and thus frees up a lot of time."

M. Piedor, Laboratory Manager

CAE Grand Ouest, France

Technical Data

KjelMaster K-375 / KjelSampler K-376/377 Technical data sheet en (801 K)

Dimensions (WxHxD)	458 x 670 x 431 mm
Screen	8.4 inch color touch
Memory	>100’000 results
Minimal titrator volume	2 μl / step
Language versions	DE, EN, FR, IT, ES, JA, CN, RU, PL, KO
Pumps	NaOH, H₃BO₃, H₂O
Measuring range	0.02 – 200 mg N
Reproducibility (RSD)	<1 %
Recovery	>99.5 % (1 – 200 mg N)

Applications

Feed - Kjeldahl

Protein, Non-Protein Nitrogen (NPN)

Food - KjelMaster

Protein, Non-Protein Nitrogen (NPN), casein (NCN), Total Volatile Basic Nitrogen (TVBN), formaldehyde

Beverage - KjelMaster

Protein, alcohol, volatile acids, diacetyl

Chemicals / Agricultural - KjelMaster

Ammonia, nitrate, nitrite (Devarda), total nitrogen

Environmental Analysis - Distillation

Ammonia, Total Kjeldahl Nitrogen (TKN), phenol, formaldehyde, nitrate, nitrite (Devarda)

Pharmaceutical / Cosmetics - Distillation

Organic nitrogen, ammonia, urea, formaldehyde

See more applications

Expert Advice

What are the benefits of potentiometric titration?

Read more about What are the benefits of potentiometric titration?

The benefits are lower detection limits, shorter analysis times, online titration and no need for indicators. The patented automatic IntelliDist mode can also be used.

What is the benefit of colorimetric titration?

Read more about What is the benefit of colorimetric titration?

It makes calibration obsolete, offers extended lifetime and the endpoint is optically visible.

What is the benefit of online titration?

Read more about What is the benefit of online titration?

Titration starts whilst the distillation is still in progress, therefore the analysis time for samples with high nitrogen content can be significantly shortened.

Why would back titration be used?

Read more about Why would back titration be used?

Back titration is only used when boric acid is not allowed. It requires an optional external dosing unit for precise addition of receiving solution.

What is the purpose of the IntelliDist function?

Read more about What is the purpose of the IntelliDist function?

When IntelliDist is used, the instrument automatically detects the optimal operating temperature is reached before the set distillation time starts. Routine work is easier as no time is wasted for manually preheating the distillation unit, and the reproducibility of results is increased.

Can results be transferred to a network folder without connecting the KjelMaster K-375 to a PC or needing additional software?

Read more about Can results be transferred to a network folder without connecting the KjelMaster K-375 to a PC or needing additional software?

Yes, the K-375 can be connected directly to the network via an ethernet cable so that results are automatically stored in a network folder.

How many results can be stored in the K-375 memory?

Read more about How many results can be stored in the K-375 memory?

More than 100,000 results can be saved.

What hardware and/or software changes are necessary to switch between potentiometric and colorimetric titrations?

Read more about What hardware and/or software changes are necessary to switch between potentiometric and colorimetric titrations?

Dependent on the titration required, the pH electrode or the optical sensor has to be attached to the K-375. This is known as Plug-and-Measure

Options

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.

Potentiometric electrode

Measuring the pH is an accurate method to detect the endpoint of a titration. BUCHI’s gel electrode is easy to handle, maintenance free and suitable for routine use.

Colorimetric sensor

The outstanding feature of the colorimetric sensor is its long lifetime. It does not require calibration and is recommended for applications that require detecting the color change of an indicator at the titration endpoint.

KjelSampler K-376

Compact sampler with 24 sample positions to fully automate the Kjeldahl analysis with the KjelMaster K-375. Transferring the sample with steam overpressure to the distillation unit is unique and offers outstanding money and time saving benefits.

KjelSampler K-377

Compact sampler with 48 sample positions to fully automate the Kjeldahl analysis with the KjelMaster K-375. The sample transfer with steam overpressure,as well as the independent rack trays for continuous sample loading are unique time saving benefits.