Displaying items by tag: Nitrogen

Vertical vs Horizontal Furnaces: The Dumas Method for Protein Determination

The Dumas method has several advantages over the Kjeldahl method: it is much faster, with much lower operating costs, no real safety issues, and no toxic waste produced. However, there is a debate over which of the two main approaches to the Dumas method is better: a vertical or a horizontal combustion furnace. Determined to settle the question on which method is more precise and offers the most advantages, LECO chemists analyzed many sample types in both an FP828 and an FP928.

For more information and a detailed breakdown of the results and a look at more of the samples used in this experiment, read Michael Jakob's article in the September 2021 issue of eFOOD-Lab International.

Read the Article!

LECOs Lösungen für Ihre Dumas- und CHNS-Analyse

 

Wollen Sie Ihre Dumas-Analyse revolutionieren?

Dann brauchen Sie die richtige Lösung.

Durch die Integration modernster Hardware und unserer Touchscreen-Softwareplattform können Sie mit der 828 SERIE oder 928 SERIE eine Vielzahl von Probenanalysen erledigen. Die Vorteile und Leistungsmerkmale früherer Generationen von LECO Makro-Verbrennungsgeräten wurden beibehalten, während Durchsatz, Verfügbarkeit und Zuverlässigkeit entscheidend verbessert wurden. Alle Modelle der Serie 828 sind mit dem S832-Add-on kompatibel und ermöglichen eine separate Schwefelbestimmung. Makroprobenanalytik und Zykluszeiten von nur 2,8 Minuten machen die 828-Serie und 928-Serie zur idealen Lösung für eine Vielzahl von Anwendungen und bieten einen beispiellos hohen Probendurchsatz. Die unerreichten Makro-Fähigkeiten der 928 Serien mit den großen Verbrennungsschiffchen für feste und flüssige Proben stehen ebenso zur Verfügung.

 


 

 


 

Sie möchten einen Dumas-Analysator, der …

 

dumas-analysator-1

... von 20 Servicetechnikern unterstützt wird, allein im Raum DACH/Benelux.

 
dumas-analysator-10

... eine korrekte Schwefelanalytik durch Hochtemperatur-Verbrennung liefert, auch mit 100% Recoveryrate.

 
dumas-analysator-4

... eine Reduktionschemikalien-Standzeit bis zu 4.000 Analysen hat, völlig egal was Sie analysieren.

 
dumas-analysator-2

... günstigste, laufende Kosten bei geringstem Wartungsaufwand bietet.

 
dumas-analysator-9

... eine kompromisslose Verbrennung in reinem O2 bietet ohne jede Matrix Abhängigkeit und weitere Infos über die Probe.

 
dumas-analysator-3

... schnelle Analysenzeiten bietet und auch im CHN / CHNS Modus nur ca. 5 Minuten benötigt.

 
dumas-analysator-7

... einen niedrigen Helium- / Argon-Verbrauch hat (1 Flasche ≈ 5.000 Analysen).

 
dumas-analysator-5

... Flüssigkeiten einfach ohne Zusatzmaterialien einwiegen kann.

 
dumas-analysator-12

... kleine Kapseln, Folien und Gelkapseln sowie großvolumige Verbrennungstiegel flexibel verwenden kann (CHNS828).

 
dumas-analysator-11

... ein traditionelles System mit Kapseln / Folien nutzt und eines mit großvolumigen Verbrennungsschiffchen (CNS928).

 
dumas-analysator-6

... die Trocknung der Gase mit einem hocheffizienten Thermokühler durchführt ohne weiteres Trägergas. Gilt nicht für H- und S-Varianten sowie CNS928.

 

 


 

CNS928 CHN828 S832 Add on

CHNS828 & CNS928 Serie – Vorteile und Merkmale

  • Unerreichter Probendurchsatz optimiert Laborproduktivität
  • Kurze Zykluszeiten von nur 2,8 Minuten für höchste Produktivität der FP/CN-Modelle
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  • Widerstandsfähiger Autoloader für 30 Proben mit optionaler Erweiterung auf 120 Proben maximiert die Laboreffizienz
  • Verbesserte Ofeneffizienz und Zuverlässigkeit dank reagenzienfreiem Design

MEHR INFOS ZUM CHNS828 ...
MEHR INFOS ZUM CNS928 ...

 


 

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FP828 | Determination of Nitrogen/Protein in Soybean Meal

CN828 | Determination of Carbon and Nitrogen in Plant Tissue

CN828 | Determination of Carbon and Nitrogen/Protein in Flour

CN828 | Determination of Carbon and Nitrogen in Soil

CHN828 | Determination of Carbon, Hydrogen and Nitrogen in Coke

FP828 | Determination of Nitrogen/Protein in Milk and Milk Products

FP928 | Determination of Nitrogen/Protein in Meat and Meat Products

FP828 | Determination of Nitrogen/Protein in Feeds, Grains, and Pet Food

Abigail MacCartney, Managing Director

LiveLab, United Kingdom

"At Livelab we have always used LECO instruments for their accuracy and reliability, but also for their reputation. If a customer knows that we have tested their samples on the LECO, then they have an increased level of confidence in the results that is important to us. I have a bit of a reputation amongst our employees for having a soft spot for LECO instruments, precisely because of their reliability and also their ease to maintain. For us, they are the number one name in CNS determination, and to that end we have two SC144 instruments, two FP528 instruments and one FP628 Nitrogen determinators. Easy to use, rarely goes wrong, easy to fix if it does, and the top name in the industry – why use anyone else?"

Accommodate Lower-Level Nitrogen Samples in Food Materials with an Optimised Combustion Method

Low-Level Nitrogen Samples in Food Materials

Did you catch our recent article on Food Navigator? Nitrogen content in food materials is necessary to measure when determining the total protein content. This measurement of nitrogen content can be performed using a classical wet chemistry method, but this tends to be a slow and tedious process. The combustion-based Dumas method has gained popularity in recent years as it significantly increases laboratory productivity. Yet when the sample has a low level of nitrogen it can be challenging to analyse. Examples of these hard-to-analyse samples include dry corn starch, NDIN filter bags, nutritional drinks, and beer. How can the combustion method be optimised to accommodate these lower-level nitrogen samples?

LECO Solutions for Inorganic Materials

LECO Solutions for Inorganic Material

From raw materials till finished products, different industries trust LECO rapid and accurate analysers measuring quality and strength on every step of materials transformation process. Learn more about Carbon and Sulfur Analysis by Combustion with the LECO CS744 and CS844, Oxygen/Nitrogen/Hydrogen Detection with the ONH836, Oxygen/Nitrogen determination by Inert Gas Fusion with the ON736, and multi-phase Carbon and Water determination with the RC612.

CHN828 | Determination of Carbon, Hydrogen and Nitrogen in Coal

ONH836 | Oxygen, Nitrogen, and Hydrogen in Refractory Metals

ONH836 | Oxygen, Nitrogen, and Hydrogen in Iron, Steel, Nickel-Base, and Cobalt-Base Alloys

ON736 | Oxygen and Nitrogen Determination in Refractory Metals and Their Alloys

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CHN628 | Carbon, Hydrogen, and Nitrogen in Hydrocarbons

CHN628 | Carbon, Hydrogen, and Nitrogen in Coke

CHN628 | Carbon, Hydrogen, and Nitrogen in Coal

CHN628 | Determination of Carbon, Hydrogen, and Nitrogen in Biomass

928 Series | Determination of Nitrogen in Fertilizer

Dave Burniston, Technical / General Manager

AMG Superalloys UK Ltd

"AMG Analytical has been working on LECO machines for over 25 years for the determination of O, N, C and S.

We embarked on a project working with LECO to bring Hydrogen testing in-house. The outcome of the project was excellent!

We have now purchased a LECO ONH836 machine and will offer the testing of Hydrogen to its external customers.

In our experience the level of commitment, technical expertise and support provided by LECO is unique within the industry.

We have no hesitation in recommending LECO to any company wishing to improve the efficiency of their operations."

Sven-Erik Bäckman, GM

D-Lab

"For our business as an accredited contract laboratory we need very flexible instruments that remain stable in the long run. Flexibility for the ever-changing levels of alloying elements and also for the lack of reference materials. We therefore need a versatile instrument for analysis and research, i.e. possible to separate, and for serving our customer with extended element range. We need top of the range instruments. D-LAB has for a long time used LECO Instruments for analysis of C S N O H.

We are very happy about the ranges that the instrument can handle!"

Andrea Franciscono

Chemical & Corrosion Laboratory
Cogne Acciai Speciali S.P.A.

"My company has been using LECO instruments for CSNH analysis since 1973. Thousands and thousands of analyses, through day and night, in a steel shop laboratory… That’s hard work… both for the operator and the analytical equipment.

Since 1973 precision and accuracy are still improving!

Simply a robust and reliable instrumentation! Simply… LECO!"

Jean-Michel Romnee

Wallonian Agronomy Research Center

"The Trumac CN is really good compared to Elementar and Thermo Flash. Here are results of a study I conducted in 2015. LECO TRUMAC is more precise compared to others. One method fits all solid and semi-solid matrix, while with other instruments, the methods need to be customized for each sample matrix!"

ONH836 | Determination of Oxygen, Nitrogen, and Hydrogen in Iron, Steel, Nickel-base, and Cobalt-base Alloys Comparison

ONH836 | Determination of Oxygen, Nitrogen, and Hydrogen in Iron, Steel, Nickel-base, and Cobalt-base Alloys Optimization

Balanced Soil: Carbon, Nitrogen, and Sulfur Determination with the CNS928

Well-balanced crops require well-balanced soil. While carbon may be the most essential element for organic life, the right ratio of nitrogen and sulfur in the soil along with the carbon can really influence the speed and strength of plant development and growth. With a macro combustion carbon, nitrogen, and sulfur determinator such as LECO's CNS928, those ratios can be discovered easily through fast and precise analysis.

There are countless fertilizers that can be applied to change the ratio of elements in soil, but without knowing the baseline for your soil, you have no practical way of knowing what it needs. LECO's CNS928 can take some of the uncertainty out of soil management.

While helium remains the inert gas of choice for elemental analysis, supply is limited, driving cost up. The CNS928 is designed to support the use of either helium or argon as a carrier gas. The thermal conductivity difference between argon and nitrogen is not as great as the thermal conductivity difference between helium and nitrogen, so the detector is inherently less sensitive when using argon for nitrogen determination, but the CNS928 does offer the option of using a larger 10 cm3 aliquot loop. The 10 cm3 aliquot loop helps to overcome the lower sensitivity of argon carrier gas by optimizing the system for the lowest nitrogen range and provides the best precision.

To see how the CNS928 handles carbon, nitrogen, and sulfur determination with various combinations of carrier gases and aliquot loop sizes, read the app note.

ON736 | Oxygen and Nitrogen in Solid Iron, Steel, Nickel-Base, and Cobalt-Base Alloys

CNS928 | Determination of Carbon, Nitrogen and Sulfur in Soil

CNS928 | Determination of Carbon, Nitrogen and Sulfur in Plant Tissue

CN928 | Determination of Carbon / Nitrogen in Soils and Plant Tissue

TC600/TCH600 | Oxygen and Nitrogen Determination in Ferroalloys

FP928 | Determination of Nitrogen/Protein in Flour

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FP828 | Determination of Nitrogen/Protein in Flour

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