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DK 6 Digestion Unit

Name: DK 6 Digestion Unit
Brand: Velp Scientifica
Availability: InStock

Kjeldahl Digestion Units with 6-position aluminum heating block that offers an excellent thermal homogeneity.

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Thermal homogeneity and precision

The DK 6 Series digestion unit with aluminum heating block ensures high thermal homogeneity heating up to 450 °C. The temperature of the block is constantly controlled by a microprocessor and is extremely stable, homogeneous and precise: ±0.5°C at all selectable temperatures.

The DK 6 Series guarantees accuracy and repeatability. The DK 6 series perform batch digestion of up to 6 samples with 250 ml test tubes - Ø 42 m, reducing the energy consumption (-13% compared to the previous series). Low energy consumption provides lower costs of analysis and limits CO2 release.

Space saving design

The design of the DK series has been carefully engineered to allow laboratories to save valuable space under the hood.

DK Digesters have very compact dimensions: the new aluminum heating block has been lowered and the vertical proportions allow to free precious space in the laboratory.

The structure is made of stainless steel that has been specifically designed and tested to ensure strong resistance to chemicals and mechanical stress.

The aluminum block protection grid provides enhanced heating performance and protects the heating block from splashes and chemicals.

Easy-to-use with the intuitive digital interface

The bright digital display provides maximum visibility and easy-to-read information.

The instrument is operated with 4 keys to navigate the menu options and program the digestions in a simple and fast way.

Through the intuitive graphic display it is possible to set up to 20 methods with 4 temperature ramps.

Acoustic signals inform the operator of the completion of the analysis facilitating the daily use of the digester.

The inclination of the front panel protects it from chemical spillage at high temperatures.

COD digestion with DK 6

DK 6 is a versatile digester suitable for Kjeldahl N/Protein applications and Chemical Oxygen Demand in the environmental industry.

In order to use the DK 6 for COD (Chemical Oxygen Demand) is necessary to configure it by adding a different support system able to manage all the glass required for the COD analysis for processing 6 samples simultaneously.

Trace Determination of Heavy Metals

The DK 6 and TMD 6 are the reliable solution for digestion with aqua regia (nitrohydrochloric acid) in order to determine the acid-soluble proportion of metals in sewage sludges, sediments and soils In accordance with official methods (DIN 38414-S7 standard).

Water-jacketed condensers of TMD 6 retain all Hg, Cd, Pb, Cr, Cu, Zn, etc.
TMD 6 is composed of high quality glass components with supports for DK 6
Excellent accuracy and precision with a temperature homogeneity of ± 0,5 °C
Space saving design
Intuitive interface
TEMS^TM Technology

Fume Neutralization System

For applications where the digestion process produces fumes, acid gases or corrosive substances, the below specific accessory is strongly recommended:

KS 1000 Scrubber neutralizes all the fumes

TEMS™ Technology

DK Series Kjeldahl digestion units work with the innovative TEMS™ benefits, for huge savings.

Time Saving: rapid heating reduces wasted time
Energy Saving: limited energy consumption thus cutting CO² emissions
Money Saving: cost reduction for each analysis
Space Saving: the narrow footprint saves valuable laboratory bench space

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Genuine consumables for your digestions

Choosing the right consumables allow the optimization of analytical operations to achieve the highest possible performance of your Digestion Unit. We strongly recommend the use of VELP original consumables in order to be sure to obtain the best performance form your VELP instrument.

The addition of a suitable catalyst, along with high temperature, have influence on the speed and the efficiency of the mineralization in Kjeldahl analysis. Achieving the highest level of performance in a wide range of Kjeldahl applications is now possible with VELP Scientifica genuine KjTabs™ catalyst and antifoaming tablets.

VELP Scientifica Nitrogen Free Weighing Boats are the perfect solution to all the difficult transfer operations of powders or syrupy samples into mineralization test tubes.

TECHNICAL DATA

Construction material:	Epoxy painted with chemical resistant coating
Temperature range:	Ambient to 450 °C / 842 °F
Stability of the heating block temperature:	± 0,5 °C
Precision of the heating block temperature:	± 0,5 °C
Set temperature:	Digital readout in °C or °F
Temperature Calibration:	Automatic
Selectable ramps:	up to 4 per program
Digestion time range:	1 to 999 minutes
Time selection:	1-minute steps
Countdown:	Digital readout
Selectable language:	EN, IT
Heating Positions	6-position
Size of tubes	250 ml test tubes (Ø 42 mm)
Power:	1000 W
Dimensions (WxHxD): (aluminum block only)	220x140x350 mm 8.7x5.5x13.8 in
Dimensions (WxHxD):	220x690x350 mm 8.7x17.2x13.8 in
Weight:	9 kg (35.7 lb)

Brochures & Leaflets

VELP Scientifica invites you to download brochures and leaflets in order to explore our premium quality solutions and to have all the major key arguments, features and specifications of a product in your hands, in any place, and at any time.

DK Series Kjeldahl Digestion Units - Brochure

Learn more about our efficient and reliable Kjeldahl Digesters, with aluminum heating block offering excellent thermal homogeneity.

DK 6 Kjeldahl Digestion Units - COD Leaflet

Learn more about our efficient and reliable Kjeldahl Digesters, with aluminum heating block offering excellent thermal homogeneity.

DK 6 Kjeldahl Digestion Units - TMD Leaflet

Learn more about our efficient and reliable Kjeldahl Digesters, with aluminum heating block offering excellent thermal homogeneity.

Analytical Instruments - Line Brochure [EN]

VELP Scientifica invites you to download line brochure to explore our premium quality solutions.

Product Portfolio - Brochure [EN]

VELP Scientifica invites you to download product portfolio brochure to explore our premium quality solutions.

Valuable Information On Kjeldahl Method

Learn more about the Kjeldahl principle, first described by Johan Kjeldahl over a century ago (1883).

Comparison tables

Select the category of products you are interested in and this tool will give you an easy overview of what is available at VELP in order to find the product that is perfect for you. These comparison tables provide a brief description with side by side features from basic equipment to the most advanced analytical solutions.

VELP Test Tubes Comparison Table

An overview of test tubes available at VELP to find the perfect product for your applications.

Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!

E-book - Barley and Feed: N/Protein Determination and Fiber Determination

Discover more about the nutritional properties of barley and how to determine n/protein and fiber to optimize livestock operations. Download the e-book with results on BIPEA proficiency testing sample.

E-book - Kjeldahl and Dumas Method Comparison: N/Protein Determination in Feed

Discover more about the Kjeldahl and Dumas methods for the determination of n/protein in various feed samples, a key parameter concerning quality control and protein declaration. Download the e-book with results on BIPEA proficiency testing samples and a comprehensive comparison of the two techniques.

Casein Determination in Milk - Kjeldahl method

Casein proteins are a family of proteins involved in the production of cheese and fermented milk. They are also extremely important nitrogen compounds in the dairy products production, additives in medicine, and have a technical use in cosmetics, paints and adhesives.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

Guidelines for choosing the correct Velp Kjtabs in Kjeldahl Analysis

The digestion phase is the most time-consuming step of the Kjeldahl analysis. Speeding up the process and ensuring a proper outcome is of fundamental importance when it comes to efficiency in the laboratory.
VELP designed seven different types of accurately pre-dosed KjTabs™ tablets to speed up the mineralization process. Along with catalysts, VELP produces antifoaming KjTabs™ to reduce foam formation during the initial phase of the mineralization process.

N/Protein Determination in Cereals - Kjeldahl method

Cereals contain between 8-15% of different kinds of proteins such as albumins, globulins, prolamines, gliadins, glutelins and glutenins. Their chemical composition is important not only for nutritional purposes, but also for the bread dough and its process of baking and for economical reason. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and AACC.

N/Protein Determination in Cheese - Kjeldahl method

Due to the greater demand and consumption of dairy products, protein analysis has become more and more important to ensure food safety, food quality and fairness in international trade. Learn how to obtain excellent performance with DK / DKL and UDK Series, and how to work in accordance with ISO and AOAC.

N/Protein Determination in Feed - Kjeldahl method

Protein is a critical nutrient in cattle, pigs, poultry, sheep, horses and pet food diets. It is required for milk production and reproductive tract reconditioning after calving.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.

N/Protein Determination in Fishmeal - Dumas and Kjeldahl method comparison

Fishmeal is an important food used in animal husbandry and in aquaculture. It is also the main ingredient of the commonly marketed feed for aquarium fish. Discover more on the results obtained with the Kjeldahl and the Dumas Method for the determination of protein content in fishmeal.

N/Protein Determination in Milk - Kjeldahl method

The protein fraction includes caseins (80%) and whey proteins (20%) and it is of interest, not only from the nutritional point of view, but also from a technological one. Milk proteins have particular chemical properties which contribute to create typical sensory features, influencing the whole food processing. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Milk Powder - Kjeldahl method

Milk powders contain all twenty-one standard amino acids, the building blocks of proteins, and are high in soluble vitamins and minerals. Compared to liquid milk, this product has a far longer shelf life and does not need to be refrigerated, due to its low moisture content.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Probiotic Drinks - Kjeldahl method

A probiotic is a live microbial food ingredient that beneficially affects the host through its effects in the intestinal tract. They are widely used to prepare fermented dairy products.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Soybean - Kjeldahl method

Soybean meal is the most important protein source used to feed farm animals. It represents two-thirds of the total world output of protein feedstuffs. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.

Nitrogen and Protein Determination in Commercial Whole Liquid Milk - Dumas vs Kjeldahl Method

Milk, consumed in many forms, has always been a part of the human diet. Due to the greater demand and consumption of dairy products, protein analysis has become increasingly important to ensure food safety, quality, and fairness in international trade. Learn about the comparison between Dumas and Kjeldahl methods in Nitrogen and protein determination.

Nitrogen and Protein Determination in Insect Flour: Kjeldahl and Dumas comparison

The trend of using edible insects to produce food is growing. Thus, the food industry needs to find analytical methods and instruments to assess their potential. Discover how to determine N/Protein content according to the Kjeldahl and Dumas methods.

Nitrogen Determination in Engine Oil - Kjeldahl method

The nitrogen content in lubricating oils must be low to prevent deposits and reduce the risk of damage: for this reason, nitrogen is considered as one of the quality control parameters of crude oil, lubricants and fuel oils. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with ASTM.

TKN Determination in Water and Wastewater

Nitrogen-containing compounds act as nutrients in streams, rivers, and reservoirs. The major routes of entry of nitrogen into bodies of water are municipal and industrial wastewater, septic tanks, feedlot discharges, animal waste runoff from fertilized agricultural fields and lawns and discharges from car exhausts. Bacteria in water quickly convert nitrites to nitrates and this process uses up oxygen. High nitrates in drinking water can cause digestive disturbances in people.

Total Dietary Fiber in Corn Flakes

Dietary fiber is not digested from human stomach and it represent a crucial nutrient in human diet for its ability to enhance satiety, to regulate intestinal functions and to modulate the nutrients absorption. Learn how to obtain excellent performance with GDE, CSF6 and Micro-Kjeldahl apparatus and how to work in accordance with AOAC 985.29.

Total Nitrogen determination in Urea – Dumas vs Kjeldahl Method

Urea is a crystalline substance widely used as a fertilizer, feed supplement, and starting material for plastics and drugs. It has a very high nitrogen content; it is readily converted to nitrate in the soil and is therefore considered one of the most concentrated nitrogenous fertilizers. The importance of having a controlled Nitrogen content in this product is crucial to always keep the same production standards.

Whey Protein Determination in Milk

In order to determine soluble whey proteins (WP), it is necessary to know the amount of milk total nitrogen (Ntot), non-casein nitrogen (NCN) and non-proteins nitrogen substances (NPN).
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

Certifications

Our compliance to statutory rules and regulations worldwide.
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety.
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1. The cNEMKOus mark has the same legal status as any other NRTL/SCC accredited marks, for U.S. and Canada.

CE Declaration of Conformity VELP Scientifica Digestion System and Hydrolysis

With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety, matching EU consumer safety, health or environmental requirements.

Service offering

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INSTALLATION

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TECHNICAL SUPPORT

ANALYTICAL SUPPORT

TRAINING COURSES

CALIBRATION & CERTIFICATION

WARRANTY

FAQ

Check technical sheets with answers to most frequently asked questions

What do we have to add to the test tube to perform the digestion step?

To properly perform the digestion step, it is necessary to prepare the glass test tube with the sample and:

1. KjTabs™ catalyst tablets to accelerate the digestion
2. Antifoam tables (especially recommended in the case of samples with a high-fat content)
3. 12 - 15 ml of concentrated sulfuric acid (98%)

How to insert the sample into the test tube?

The sample must be weighed within Nitrogen free weighing boats (CM0486000) and then placed inside the test tubes. In so doing there is no risk of part of the sample sticking to the test tube parts and the digestion therefore not being performed correctly.

Which kind of test tubes does VELP supply?

VELP provides a full set of test tubes. Download here the comparison table!

DK 6 Digestion Unit

Thermal homogeneity and precision

Space saving design

Easy-to-use with the intuitive digital interface

COD digestion with DK 6

Trace Determination of Heavy Metals

Fume Neutralization System

TEMS™ Technology

Models

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Genuine consumables for your digestions

Adapter for probe Ø3mm for DK/DKL/ECO

Air condenser with ground cone

Antisplash bell

COD test tubes Ø 42x200 mm, 200 ml with cone NS 29/32, 3 pcs/box

Glass cap

IQ/OQ DK Manual

KjTabs VCM - 1000 pcs/box

KjTabs VCT - 1000 pcs/box

KjTabs VKPC - 1000 pcs/box

KjTabs VS Antifoam - 1000 pcs/box

KjTabs VST - 1000 pcs/box

KjTabs VTCT - 1000 pcs/box

KjTabs VW - 1000 pcs/box

Mineralization Rod, pack. 10 pcs

PTFE sheaths for 29/32 cones

Sample rack for COD DK6

Sample rack for DK6

Stand for DK6-DK6/48

Suction cap and drip tray for DK6

Support for DK6-DK8-DK18/26-DK6/48

Test tubes Ø42x300 mm, 250 ml 3pcs/box

TMD 6

Weighing boats 58x10x10 mm, 100 pcs/box

Weighing boats 70x23x15 mm, 100 pcs/box

TECHNICAL DATA

Brochures & Leaflets

Comparison tables

Application notes

Certifications

Webinars

HOW TO DETERMINE NITROGEN AND PROTEIN WITH THE DUMAS AND KJELDAHL METHODS: THE CASE OF NITROGEN FRACTIONS IN MILK

MASTER CLASS N-PROTEIN DETERMINATION: KJELDAHL AND DUMAS METHODS

Highlights

DUMAS AND KJELDAHL METHOD COMPARISON: PROTEIN DETERMINATION IN FEED

OPTIMIZE YOUR KJELDAHL ANALYSES WITH VELP KJTABS - KJELDAHL CATALYST AND ANTIFOAMING TABLETS

Industries

Food & Beverage

Feed

Environment

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Pharmaceutical and Life Science

Chemical and Petrochemical

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