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Exeter Analytical : Analyzing Soil Samples for Percentage Carbon, Hydrogen & Nitrogen

Clicks:874 Date:03/28/13
Exeter Analytical : Analyzing Soil Samples for Percentage Carbon, Hydrogen & NitrogenApplication note 51* from Exeter Analytical Inc. illustrates how the Carbon, Hydrogen and Nitrogen (CHN) content of soil samples can be precisely and reproducibly determined using their Model 440 Elemental Analyzer.

The determination of the Carbon, Hydrogen and Nitrogen (CHN) content of soil samples is of major interest to environmental and agrochemical laboratories throughout the world.  Organic matter is known to directly influence the productive capacity of different soils as it is a major contributor of C, H as well as N, P, S and other nutrients. Percentage Carbon can be determined in both its inorganic and organic forms via acid pre-treatment or temperature differential measurement using an Exeter Analytical Model 440 Elemental Analyzer. The determination of the Nitrogen content of soils using a Model 440 Elemental Analyser saves considerable time and cost with no diminishment of data quality compared with the traditional Kjeldahl nitrogen determination method.

This application note includes details of the analytical methodology used plus data demonstrating the high quality of CHN data determination that is possible using a Model 440 Elemental Analyzer.

The Exeter Analytical Model 440 is a static combustion CHN Elemental Analyzer, with a unique horizontal furnace design, which enables easy removal of sample residue between each soil analysis.  Consequently one combustion tube will analyze in excess of 1000 soil samples without the need for removal and cleaning. By comparison other elemental analyzers, employing vertical furnace designs, will require cleaning after as little as 20 samples. The gas flow characteristics of the Model 440 analyzer are superior to other elemental analyzers due to the effective elimination of troublesome residue build-up. This thereby provides longer-term calibration stability as well as enhanced accuracy and precision for measured soil sample data.

In addition, as the Model 440 provides complete control over combustion parameters it is able to reproducibly achieve 100% combustion with the widest range of soil samples. Proprietary Nitrogen analysis software uniquely enables accurate measurement of low Nitrogen levels (in the 0.1-0.2% range) with a high degree of accuracy.

For a copy of this new application note please contact Exeter Analytical on +1-978-251-1411 / +44-2476-323223 (in Europe) or email sales@eai1.com. 

Exeter Analytical, Inc. as a company has been dedicated to elemental microanalysis for 25 years. Our expertise and experience with instruments, consumables and supplies has allowed us to better understand all issues facing microanalysts.  As a consequence, whether you are a regular or an occasional purchaser, experienced and knowledgeable staff is always available to provide technical advice. 


      路  Link: http://www.exeteranalytical.co.uk/ce440_notes.php

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European HQ

Exeter Analytical (UK) Ltd.
University of Warwick Science Park
Barclays Venture Centre
Sir William Lyons Road
Coventry CV4 7 EZ
UK
tel. +44-2476-323223
fax +44-2476-323221

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North America HQ

Exeter Analytical Inc
Chelmsford, MA USA

tel. +1-978-251-1411
fax +1-978-251-4536
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