LECO’s 832 series will bring productivity, precision, and progress to your lab when determining the sulfur and carbon content in a wide variety of organic materials. Our Cornerstone® brand software platform powered by a touch-screen interface, increases usability and operational control without using valuable bench space. A high-efficiency combustion furnace, improved IR cell design, and a robust, rugged design make the 832 a valuable resource for any laboratory needing fast and accurate analysis.
The 832 series is ideal for the following applications: Coal and Coke, Combustion Residues, Biomass Materials, Catalyst Materials, Cement, Soil and Ore Materials, Ceramics, Glass, Gypsum and Building Materials, Hydrated Lime and Cement, Fertilizer, Feeds and Plant Tissue Materials, Rubber, Resins and Polymers, Graphite, and Petroleum Products and Additives
The 832 Series of Elemental Determinators are specifically designed to determine the sulfur and carbon content in a wide variety of organic materials such as coal, coke and fuel oils, as well as some inorganic materials such as soils, cements and limestone by high temperature combustion with non-dispersive infrared detection (NDIR).
Analysis begins as a sample is weighed into a combustion boat and placed into the furnace typically regulated at 1350 oC with a pure oxygen environment. The sample combusts, releasing carbon as CO2 gas with the sulfur forms being oxidized and released as SO2 gas. After a preset time, additional oxygen is introduced via a ceramic lance directly above the sample to accelerate the combustion of refractory materials. The combustion gases are swept to the back of the furnace and then forward through the inner and outer furnace tubes, allowing the combustion gases to remain in the high temperature zone of the furnace ensuring efficient oxidation. Upon exiting the furnace, the combustion gases flow through anhydrone tubes removing moisture and on to the flow controller, setting the flow of the combustion gases through the NDIR sulfur and/or carbon detection cells.
Non-dispersive infrared cells are based on the principle that CO2 and SO2 absorb infrared (IR) energy at unique wavelengths within the IR spectrum. Incident IR energy at these wavelengths is absorbed as the gases pass through IR absorption cells with the absorption being dependent upon the path length of the cell. The Dual Range (DR) sulfur 832 model has a wider sulfur range due to a short and long path length IR cells provided for measurement of high and low range sulfur signals. The software automatically selects which cell to use for optimum measurement in the 832DR model. The concentration of unknown samples is determined relative to calibration standards.
An external PC with LECO Cornerstone brand software manages all of the quantitative calculations and saves all of the data.
The TruSpec Micro delivers optimal performance in carbon, hydrogen, nitrogen, sulfur, and oxygen determination in solid or liquid micro samples. Components work together to provide you with reliable, consistent performance marked by rapid analysis times, greater robustness/less downtime, and reduced maintenance.
The efficiency and speed of the TruSpec Micro CHN and CHNS is a result of the unique combination of a flow-through carrier gas system used in conjunction with individual highly selective, infrared (IR) and thermal conductivity detection systems.
A weighed micro sample is placed into the autoloader of the TruSpec Micro and is automatically dropped into the high-temperature combustion furnace, allowing the sample to combust. This combustion converts carbon to CO2, hydrogen to H2O, nitrogen to N2, and sulfur to SO2. The combustion gases are swept from the furnace, through scrubbing reagents, and onto the detection systems as they are being released. Independent IR detectors are used for simultaneous detection of carbon, hydrogen, and sulfur. Nitrogen is measured using a thermal conductivity detection system. The entire analysis cycle is complete in approximately 4 minutes.
The optional micro oxygen add-on module enables the TruSpec Micro to determine oxygen content in organic matrices and is compatible with the both the TruSpec Micro CHN and CHNS models. Samples being analyzed for oxygen are placed into the autoloader of the micro oxygen add-on module and automatically dropped into a high-temperature pyrolysis furnace. The oxygen released during pyrolysis of the sample reacts with a carbon-rich environment in the furnace to form CO. The CO is swept from the furnace and converted to CO2 before measurement via infrared detector (approximately 1 minute analysis time).