• Maximize laboratory productivity with unmatched sample throughput
• Rapid cycle time of 2.8 minutes for added productivity on FP/CN models
• Extended reagent lifetimes optimize instrument up-time
• Easy access to common maintenance areas reduces downtime and time required for routine maintenance.
• Rugged 30-sample autoloader with optional expanded capacity for up to 120 samples maximizes lab efficiency.
• Ergonomic, operator-centered design with boom-mounted touch-screen interface
• Expanded furnace efficiency and reliability with a regent-free design

Applications

The 828 series is ideal for the following applications: Feeds, Pet Foods, Grains and Cereals, Milled Products, Fermentation Products, Dairy Whey and Cheese Products, Soils, Sediments, Fertilizers, Plant Tissue, Waste Materials, Resins and Polymers, Coal and Coke, Biomass Materials, and Petroleum Products and Additives.

The 828 Series determines nitrogen/protein, carbon/nitrogen and carbon/hydrogen/nitrogen in a multitude of organic matrices from food/feeds and soils to fuels. The system utilizes a combustion technique with a vertical quartz furnace designed to handle diverse sample matrices with rapid cycle times and extended reagent lifetimes, delivering unsurpassed throughput coupled with superior instrument uptime. To begin an analysis, the sample is weighed into a tin capsule or encapsulated within tin foil and placed into the loader. A fully automated analysis sequence transfers the sample to a sealed purge chamber, where atmospheric gas is removed. The purged sample is transferred automatically into a reticulated ceramic crucible within the furnace. To ensure complete and rapid combustion (oxidation) of the sample, the furnace environment is composed of pure oxygen with a secondary oxygen flow being directed to the sample within a reticulated crucible via a quartz lance. In the FP and CN828 models, the combustion gases are swept from the furnace through a thermoelectric cooler to remove moisture and are collected in a ballast volume. In the CHN828 model, combustion gases are swept from the furnace through an afterburner containing reagent to scrub sulfur compounds from the gas stream prior to collection in the ballast volume. The gases equilibrate and mix within the ballast before a representative aliquot of the gas is extracted and introduced into a flowing stream of inert gas for analysis. Depending upon the analyzer model, the aliquot gas is carried to a non-dispersive infrared (NDIR) cell for the detection of carbon (as carbon dioxide) and a thermal conductivity cell (TC) to detect nitrogen (N₂). In the CHN828 model, the ballast gas is also transferred to a H₂O NDIR cell for the determination of hydrogen. Unlike NDIR cells, TC cells are chemically non-specific, so a series of reagents and scrubbers are used to ensure quantitative detection of N₂ without chemical interference. A heated reduction tube, filled with copper, is used to convert nitrogen oxide species (NO_x) to N₂ and remove excess oxygen. Carbon dioxide (CO₂) is removed by LECOSORB and water vapor (H₂O) is removed by Anhydrone.

Careful sequencing of the analysis provides maximum sample throughput by interleaving the sample loading sequence with quantitation of the aliquot gases from the previous sample.

Many diagnostic sensing capabilities are included in the 828 Series analyzer. Multiple Pressure Transducers (PT) have been included to provide the ability to leak check individual segments of the flow path.

The LECO AC600 semi-automatic calorimeter was developed to measure the calorific content of various organic materials such as coal, coke, and fuel oil.

The calorific value of a sample is determined by precisely measuring the heat released after combustion of the sample in a controlled environment. The heat released is proportional to the calorific value of the substance.

The sample is placed into a combustion vessel, which is pressurized with oxygen. The combustion vessel is automatically lowered into a water bath within the instrument known as a bucket. The bucket is sealed using an inflatable bladder. The cavity surrounding the bucket is known as the jacket and is also filled with water. The water temperature in the jacket is closely controlled at a precise set temperature (isoperibol calorimeter system). The sample is ignited and the temperature of the bucket and jacket water is measured by an electrical thermometer with a resolution of 0.0001 of a degree. A measurement of the water temperature inside the bucket and jacket is collected every second. The results can be corrected within the software for any spiking, nitrogen, sulfur, moisture, and ash content if necessary. Two options for analyzing data are available. A simple temperature difference may be chosen by the user (Delta T mode), in which calorific values are determined by a simple maximum temperature rise of the bucket. The user may also choose to use a thermodynamic model (TruSpeed mode) that has been developed by LECO to model heat exchange within the AC600 system. The TruSpeed mode takes into account heat capacities of the system's components along with corrections for energy transfer within the system. The TruSpeed mode enables the AC600 to attain rapid 5 minute analysis times without compromising the accuracy or precision of the calorific result.

• Automated loss-on-drying moisture analysis of up to:
  • 16 samples using 1.5 inch diameter aluminum foil crucibles
  • 10 samples using 2.4 inch diameter aluminum foil crucibles

• Maximized throughput with rapid ramping of the oven temperature and fast cooling post analysis
• Optimized drying time with automatic end point recognition based upon sample mass constancy
• Limited sample interaction requirements for reduced operator handling time
• Integrated 10.1 inch (diagonal) color LCD touch-screen with Cornerstone^® software reduces instrument footprint, and promotes an ergonomic and efficient workflow

The TGM800 is a thermogravimetric analyzer designed to directly determine moisture content of materials using a loss-on-drying technique. Mass loss of the sample is measured as a function of the oven temperature while controlling the atmosphere and ventilation rate. The instrument consists of a computer, an integrated four place balance, and a multiple sample oven that allows up to 16 samples to be analyzed simultaneously.

After an analysis method has been selected, empty aluminum foil crucibles are loaded into the oven carousel. The analysis method controls the carousel, oven, atmosphere ventilation, and balance operation. On completion of crucible tare, each crucible is presented to the operator for sample loading. The initial sample mass is measured and stored automatically. Once all the samples have been loaded, the analysis starts with the oven temperature ramping to the set point, the beginning of ventilation, and the sequential collection of the individual sample masses. Crucibles are automatically indexed to the position above and lowered onto the balance pedestal where the sample mass is recorded. The mass loss of each sample is monitored, and the oven temperature and atmosphere ventilation rate is controlled according to the selected analysis method. Method analysis length can be programed to a fixed time or be dependent on the sample mass constancy. The moisture result is calculated as a percent mass loss for each sample and reported at the end of the analysis.

The instrument contains an intuitive touchscreen interface that enables complete access to analysis control, method settings, diagnostics, sample reporting, and more in a highly organized and immersive environment. Analysis methods can be tailored to satisfy most moisture applications with editable oven temperature, temperature ramp rate, atmosphere, and ventilation rate. The software also provides on-screen plotting of sample mass loss and temperature, as well as storing and managing all of the data and quantitative calculations.

The TGM800 maximizes lab efficiency, productivity, and analytical performance with a sample batch capacity up to 16 samples with sequential sample mass measurements occurring throughout the analysis process.

• Automated analysis of up to 19 samples for increased throughput.
• Automatic end point recognition based upon sample mass constancy
• Stable and precise mass measurements throughout the analysis cycle using an integrated, thermally isolated 0.0001 g low drift balance
• Precise furnace temperature ramping and set point control provides excellent temperature accuracy with low temperature overshoot
• Rotating automation sequence provides uniform exposure of all samples to the furnace conditions
• Automated control of furnace atmosphere and gas flows (air, nitrogen, or oxygen)
• Flexible method settings enable configuration of system to emulate classic gravimetric test method requirements

Applications

The TGA801 is ideal for the following applications: Coal and Coke, Combustion Residues, Biomass Materials, Catalyst Materials, Soil and Ore Materials, Ceramics, Gypsum and Building Materials, Hydrated Lime and Cement, Flour and Milled Products, Feed Materials, and Resins and Polymers

The TGA801 Thermogravimetric Analyzer determines weight loss, including moisture, ash, volatile content, and Loss-on-Ignition (LOI), in various organic, inorganic, and synthetic materials. Weight change is measured as a function of temperature as samples are exposed to a temperature program in an atmosphere-controlled environment. The multi-sample furnace design allows for simultaneous analysis of up to 19 samples.

Analysis begins when samples have been logged in and empty crucibles have been loaded into the sample carousel. After empty crucible weights have been automatically recorded, the user is prompted to load samples. Once loaded, sample weights are recorded and the method-specified furnace-temperature program begins. One of three analytical gases (air, N₂, or O₂) are used to control the atmosphere inside the furnace during the course of an analysis. Temperature, temperature ramp rate, atmosphere, and duration (fixed time or mass constancy) are selectable for each method step. Moisture, volatile, and ash steps are most commonly utilized and are available as preset method steps.

The mass change of each sample is sequentially monitored throughout an analysis. Crucibles are automatically indexed to the position above (and lowered onto) the balance pedestal where sample weights are recorded. Percent mass change is typically reported at the end of each step; although alternative and additional calculations can be specified by the user in the method.

An external PC with LECO Cornerstone^® brand software manages all of the quantitative calculations and saves all of the data.

ChromaTOF Version 5.0 encapsulates the industry’s most advanced qualitative and quantitative capabilities in one user-friendly data-handling system. Supports both Pegasus BT and Pegasus GC-HRT⁺ instrument platforms.

Features

• Automatic tuning and associated report generation
• Absolute concentration of analytes based on calibration curve
• Relative quantitation based on a reference’s or analyte’s curve
• Quantitation from a single channel detector (Flame Ionization Detection FID)
• Importable ready-to-use workspace templates for access to preferred user interfaces and reduced set-up times
• Deconvoluted spectra are easily searched against the latest NIST, Wiley, or user-created library for identification
• Semi-Quantitative Analysis for the reporting of non-calibrated compounds
• Integrated control of a variety of sample handling options from LECO and Agilent; contact closure for other vendors
• Automatically export data to CSV, ANDI MS, NETCDF, or LECO file formats
• Compatibility with LECO's liquid nitrogen or consumable-free GCxGC thermal modulator
• GC×GC Classification development tools
• Integrated control of Agilent 7890GC
• Search for unknown unknowns with ChemSpider
• Helpful tools to:
      - Calculate monoisotopic mass from formulae
      - Generate formulae from measured mass
      - Calculate mass resolution needed to separate 2 masses

Features Exclusively for Pegasus GC-HRT⁺ 

• Automated unknown identification with High Resolution Deconvolution algorithm
• Automatic fragment formula generation and corresponding mass accuracies from NIST generated library matches
• Create and use Accurate Mass Spectral Libraries. New LECO Accurate Mass Library, built for the GC-HRT+ gives you complete confidence that a hit is strong identification. Calculate a similarity score (AML Rank) based on accurate masses
• User-scalable mass defect plots; e.g. Kendrick mass defect scale
• Optional Spectral Analysis Tool add-on allows you to use Van Krevelen and Carbon Number versus RDBE (ring double bond equivalents) plots, and many other advantages

Pegasus BT Features

• Automated unknown identification with NonTarget Deconvolution algorithm
• Full profile mass spectra at are acquired at 35 kHz with better than nominal resolution

• Automation for up to 162 two mL samples, or 45 ten/twenty mL samples.
• Discrimination-free injection speeds with complete injection cycle time down to 100 milliseconds.
• Bottom-sensing technology ensures that even very small volumes can be sampled.
• Four separate models available so you may configure your package based on your autosampler needs.