EAI - Model CE440 -Elemental Analyser

• Unparalleled accuracy and precision.
• We offer a unique horizontal design, enabling sample ash removal between each analysis. This eliminates any potential memory effects and ensures consistent high quality results every time you carry out an analysis.
• Sample analysis time of less than 5 minutes.
• Low cost per analysis.
• Wide sample application range, Organic, Inorganic, Volatile’s, Refractories, Filters, Low levels, High levels. What ever your application the CE440 will enable you to obtain the highest quality data for your samples.
• Fully automated diagnostics and maintenance alerts.
• Windows XP, Vista, Windows7 and Windows10 real time data acquisition software. Password protected user operation and database protection.
• Full data export facilities and flexible report generation.

The samples to be analysed are weighed into disposable tin or aluminum capsules. The sample is injected into a high temperature furnace and combusted in pure oxygen under static conditions.

At the end of the combustion period, a dynamic burst of oxygen is added to ensure total combustion of all inorganic and organic substances. If tin capsules are used for the sample container, an initial exothermic reaction occurs raising the temperature of combustion to over 1800°C.

The resulting combustion products pass through specialised reagents to produce from the elemental carbon, hydrogen, and nitrogen; carbon dioxide (CO₂), water (H₂O) and nitrogen (N₂) and N oxides. These reagents also remove all other interferences including halogens, sulfur, and phosphorous. The gases are then passed over pure copper wire to remove excess oxygen and to reduce oxides of nitrogen to elemental nitrogen. After this stage the gases enter a mixing chamber to ensure a homogeneous mixture at constant temperature and pressure.

The mixture then passes through a series of high-precision thermal conductivity detectors, each containing a pair of thermal conductivity cells. Between the first two cells is a water trap. The differential signal between the cells is proportional to the water concentration, which is a function of the amount of hydrogen in the original sample. Between the next two cells is a carbon dioxide trap for measuring carbon. Finally, nitrogen is measured against a helium reference.

Sulfur is measured separately, as sulfur dioxide, by replacing the combustion and reduction reagents. Oxygen is also measured separately by pyrolysis in the presence of platinized carbon. The oxygen is finally measured as carbon dioxide. Both analyses are easily carried out and require a simple change of reagent tubes. In this way the analysis of either sulfur or oxygen is not compromised by trying to determine several elements at the same time. Parameters and reagents are optimised for the element undergoing analysis.

The CE440 is capable of analysing a very wide range of sample types due to our unique horizontal injection, static and dynamic combustion, and optimized detector design.

Organics and Pharmaceuticals – The CE440 can analyse virtually any class of organics, including organometallics, heterocyclic nitrogen derivatives, steroids, polynuclear aromatics, and organophosphorous.

Environmental – Analyse the effects of fuels, oils, and their by-products on the environment, or study the composition of material retained by membranes used in oceanography, water filtration, and air monitoring.

Polymers – The CE440 provides a fast, direct method for determining elemental composition of polymers, copolymers, and blends. Even samples with high levels of halogens, like PVC or Teflon®, can be analysed rapidly and accurately.

Refractories – Nitrides, graphite fibres, and ceramics are easily analysed – even carbides with melting points over 2000°C.

Volatile/Air Sensitive Samples – Volatile and air sensitive materials are easily analysed using our capsule sealing device.

Other Application Areas: Plastics, petrochemicals, agriculture, food, and pyrotechnical compounds.

In addition to the automatic sample changer, Exeter Analytical, Inc. offers several other accessories to customise your system for your particular requirement.

Manual operation – This is the lowest cost option for customers only wishing to analyse lower numbers of samples. This reduces instrument cost by approximately 20%. The instrument can be upgraded at a later date to enable fully unattended running when you have sufficient samples to justify the option.

Capsule Sealer – This device ensures sample integrity by making a cold weld of the sample capsules. Analysing highly volatile samples such as gasoline and oils becomes routine.

Refractory Materials Kit – This kit contains fluxes and special sleeves for the combustion of difficult samples requiring rigorous conditions for extracting carbon and nitrogen.

Exeter Analytical is a company specialising in the manufacture of elemental analysers. We can provide support and advise on all application areas and we run a CHN/O/S application laboratory to assist you in getting the best results on your samples.

• Accuracy: With standard organic compounds, ±0.15% absolute plus ±0.15% relative
• Sample Size: Typically 1-5 mg; up to 500 mg for samples with low carbon content
• Analysis Time: Less than 5 minutes for CHN
• Controller: XP, Vista, Windows7, Windows10
• Automation: 64 sample carousel, OR, single sample with ability to re-weigh for ash
• Range: 100 ppm to 100%
• Detector: Thermal conductivity
• System Sensitivity: ±1 microvolt
• Analytical Sensitivity: Less than 1 microgram
• Power: 110/220 V, 60/50 Hz, 10 amp, single phase
• Weight: 57kg
• Dimensions: 81cm x 71cm x 33cm
• Bottled Gases Required: Helium/Oxygen 99.995% purity