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Application Notes

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Download51  – Environmental Analysis: Determining the CHN content of soil samples
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. The primary interest is to determine carbon and nitrogen content…


Download52  – Environmental Analysis: Determination of Carbon, Hydrogen & Nitrogen (CHN) In Filtered Samples
The technology for easy, direct automated elemental analysis of material retained on filters used in water filtration and air monitoring applications is now available for the Exeter Analytical Model 440 Elemental Analyser…


Download53  – Environmental Analysis: Determination of total Carbon, Hydrogen & Nitrogen in filtered Oceanographic samples
The technology for easy, direct automated elemental analysis of material retained on filters from oceanographic applications is now possible using the Exeter Analytical Model 440 Elemental Analyser…


Download54  – Environmental Analysis: Determining the Fuel Value of Waste Materials
Easy direct determination of the percentage levels of Carbon, Hydrogen & Nitrogen (CHN) in waste materials is now possible using the Model 440 CHN Elemental Analyser. Determination of the CHN content of a variety of waste materials can now be completed in just 6 minutes…


Download58 – CHN Analysis: Handling challenging samples
The use of elemental microanalysis to determine percentage carbon, hydrogen and nitrogen (CHN) in samples and comparison of this data versus theoretical values is a well-established technique for determining sample purity…


Download210 – Direct Determination of Carbon, Hydrogen, and Nitrogen for Environmental and Industrial Filter Applications
The technology for easy, direct automated elemental analysis of material retained on certain membranes used in water filtration and air monitoring applications is now available on the Exeter Analytical Model CE440 Elemental Analyzer. Greatest efficiency is achieved using the CE440 equipped with a multi-sample injector…


Download211 – Analysis of Pentaerythritol Tetranitrate on the CE440 Elemental Analyser
Pentaerythritol Tetranitrate (PETN) is a compound commonly used industrially in the manufacture of detonating fuse and therapeutically as a vasodilator…


Download212 – Analysis of Nitrocellulose Using the CE440 Elemental Analyser
Nitrocellulose is the common name for a family of explosive materials based on the cellulose unit C12H20O10. Included among these are pentanitrocellulose, dekanitrocellulose, and pyroxylin. Historically, the nitrogen content of this compound, as well as other munitions, has been analyzed with a nitrometer…


Download215 – Enhanced Combustion for Elemental Analysis of Refractory and Steel Compounds on the CE440
Because of their physical properties, refractory compound, such as carbides and nitrides, are finding ever increasing applications in the field of new technology. In one such field, advanced ceramics, the knowledge of the carbon and nitrogen content is of primary importance…


Download217 – CHN Analysis of High Concentration Fluorine Samples on the CE440
Most compounds containing fluorine can be run successfully on the Exeter Analytical CE440 under standard operating conditions. The magnesium oxide in the combustion tube reagent packings absorbs fluorine as HF, and releases the hydrogen…


Download218 – Determination of Oxygen in Organic Compounds with the CE440
The Model CE440 Elemental Analyzer has been verified as an accurate technique for the determination of oxygen in organic compounds. The method involves a conversion, where the combustion and reduction tubes used for CHN analysis are replaced with pyrolysis and oxidation tubes, respectively…


Download219 – Determination of Sulfur Content on Glass Fiber Filters
Total Sulfur content on 4.25 cm. or smaller glass fiber filters can be determined on the Exeter Analytical CE-440 Elemental Analyzer with single-sample automation (SAI) or 64 sample automation (HA-64). This procedure is suitable for oceanographic samples and environmental air samples…


Download220 – Handling Techniques and Procedures for Liquid Samples
The analysis of liquid samples can be done quite easily on the Exeter Analytical CE440 analyzers without sacrificing accuracy or precision. By implementing the following procedure for handling liquid samples, all CE440 users can now be assured of quality results…


Download221 – Kjeldahl replacement: Nitrogen Analysis on the CE440 Elemental Analyser
The determination of the Nitrogen content in agricultural and biological products has conventionally been done with the classical Kjeldahl technique. Many laboratories have replaced the rigorous Kjeldahl method with the Model CE440 Elemental Analyzer…


Download230 – Method for Determination of Organic Carbon on Sediment Samples
The CE440 Elemental Analyzer can perform direct automated elemental analysis of organic carbon with a minimum of sample preparation. The samples are placed in acid to dissolve the carbonate material and then filtered. The filters are run on the analyzer…


Download231 – Analysis of Fertilizers Using the CE440 Elemental Analyser
The analysis of fertilizers for their Carbon and Nitrogen content can be done very rapidly and accurately on the Exeter Analytical CE440. The CE440 elemental analyzer uses thermal conductivity detectors to simultaneously analyze the nitrogen, carbon and hydrogen content…


Download232 – Theory of Operation
In the 440 Analyser, the carbon, hydrogen, and nitrogen content in organic and inorganic compounds can be determined. Combustion of the weighed sample (typically 1-3 mg; in certain cases up to 500 mg) occurs in pure oxygen under static conditions..


Download233 – Procedure for Analyzing Volatile Liquid Samples
The analysis of volatile samples can be done quite easily on the Exeter Analytical 440 analyzers without sacrificing accuracy or precision. Liquid samples are simply injected into sample containers and the containers are sealed…


Download234 – Method for Determination of Nitrogen in Meat Samples
The CE440 Elemental Analyzer can perform direct automated elemental analysis of total nitrogen with a minimum of sample preparation…