Thermogravimetric Analyzer THERMOSTEP TGA
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THERMOGRAVIMETRIC ANALYZER

THERMOGRAVIMETRIC ANALYSIS Thermogravimetric analysis is used to determine the mass loss of a sample as a function of the temperature. Suitable instruments include standard laboratory ovens and muffle furnaces with a fixed temperature and subsequent weighing, as well as TGA analyzers with integrated balance and a variable temperature range. ELTRA’s TGA Thermostep combines the drying and ashing process with integrated weighing. For the determination of various thermogravimetric parameters in one analysis cycle, the software allows to define different temperatures and gases (e. g. oxygen or...

ELTRA TGA analyzers are an ideal alternative to standard labo- heating chamber can be freely defined by the user during anal- ratory ovens and muffle furnaces for thermogravimetric analysis. ysis to create a standard operating procedure. The crucible lids, Thanks to a programmable furnace that is connected to an in- covering of the samples, can be raised or lowered at each stage of tegrated balance, heating and weighing are combined in one the analysis, thus allowing for safe and ASTM-compliant determi- instrument. This saves time-consuming manual work and allows nation of volatiles in coal...

PRECISE RESULTS HIGH-PERFORMANCE ANALYSIS TECHNOLOGY The TGA Thermostep is a powerful thermogravimetric analyzer characterized by robust design, high precision and flexibility. It is possible to apply different atmospheres and to use sample weights of up to 5 g. The Thermostep reliably and efficiently measures parameters such as moisture, ash and volatiles according to a user-defined SOP. HIGH-CAPACITY HEATING ELEMENTS The latest TGA Thermostep generation utilizes three The TGA Thermostep is very flexible with regards to the purging gas used. At each stage of the analysis either nitrogen,...

BENEFITS TGA THERMOSTEP I Precise measurements I Long-term stability I Low maintenance I Long operating life Encapsulated weighing cell

SIMPLE OPERATION YIELDS QUICK RESULTS Option: Crucible lids Operation of the TGA Thermostep is simple, convenient and safe. After selecting the Standard Operating Procedure (SOP) in the PC, the sample ID’s can be entered into the software. The samples are then weighed in the crucible at the position assigned to the sample ID in the carousel. After one sample has been weighed, the carousel automatically rotates to the next position and the next registered sample can then be weighed in the crucible. Alternatively, a carousel filled with samples which has been weighed externally, can be placed...

WORKING IN COMPLIANCE WITH STANDARDS The ELTRA TGA Thermostep complies with the following international standards, among others: THE TGA APPLICATION INSTRUCTIONS In order to determine thermogravimetric parameters with the TGA Thermostep, an application instruction must be created once. For this purpose, the general conditions for the individual analysis steps are defined once in the Thermostep software. An application for complete coal analysis consists, for example, of the determination of moisture, volatile components and ash. An analysis step includes the specifica- Coal, coke Combustion...

INTELLIGENT CRUCIBLE MANAGEMENT SAMPLE CAROUSEL AND REFERENCE CRUCIBLE SAMPLE WEIGHING The metal sample carousel accepts up to 19 ceramic crucibles. Position no. 20 is reserved for the reference crucible which is part of every measure- The samples are weighed automatically in the TGA Thermostep. ment. It is used to compensate for weight loss in the crucible, a physical effect which could lead to measurement errors at high temperatures. The analyzer allocates the positions of the crucibles in accordance with the number of samples to be measured to ensure the best possible stability during...

PC CONTROL WITH WINDOWS®-BASED SOFTWARE Simultaneous display of temperature (red) and loss in weight ELTRA’s instrument software ensures convenient control and operation of the analyzers. It is multilingual, easy to understand and provides the following features: I Custom layouts: user-defined display of windows and storage of different layouts I User profiles with multi-level access: creation of different hierarchy levels with different authorizations I Storage of analysis results in data base: I The data of each analysis is stored and can be called up later I Graphic display of...

The determination of moisture, ash and volatiles in coal is a routine application in coal-fired power plants. The TGA Thermostep is ideally suited to determine the various degrees of decomposition of chemicals at This can be done manually with various muffle furnaces or in a TGA Thermostep. The optional automated different temperatures. crucible lid management of the Thermostep ensures reliable determination of volatile components. In contrast to analyzers of other manufacturers, it is not necessary to open the Thermostep or run a second anaylsis The example shows calcium oxalate; the...

Sample weight Number of sample carousels Furnace temperature From room temperature to 1,000 °C Temperature control Adjustable from 1 to 10 l/min The LOI test (loss on ignition) is particularly important for inorganic materials. For this test the sample is quickly heated to a defined high temperature. This method is used to rapidly determine the volatile components without modifying the sample characteristics too much. To determine residual moisture in cement an intermediate step at 105 °C was added to the LOI test at 1,000 °C. The total analysis time for both parameters in a 1 g sample was...

Eltra GmbH Retsch-Allee 1-5 42781 Haan Germany Telephone: +49 2104 2333-400 Fax: +49 2104 2333-499 www.eltra.com Verder Scientific is a business field belonging to the Verder Group and sets standards in the development, manufacture and sale of laboratory and analytics devices. Used in quality VERDER SCIENTIFIC control, research and development for test-piece preparation and the analysis of solids. For several decades our companies have supplied production plants and research institutes, laboratories for quality testing and analytics, all kinds of technical specialists and scientists with...