LINSEIS / JASCO Thermal balance/FTIR // Evolved Gas Analysis EGA with TG / FTIR coupling technique This instrument consists of a horizontal Linseis balance series L81 which is coupled wi th a JASCO FTIR spectrometer series 460. This combination of 2 instruments enables to measure the change of weight over temperature and the evolved gas analysis by means of the JASCO FTIR in a temperature range from –150 up to +500°C. Other temperature r anges up to 1550°C are also possible by using a different type of furnace. The used Linseis thermo balance L81 has a horizontal measuring system which can measure weight changes with a resoluti on of 1 microgram. The furnace is a low temperature furnace which can go as low as –150°C by use of liquid nitrogen. The maximum temper ature is 500°C. The sample holder is made out of quar tz and has a relatively large volume of 3ml. The samples are placed i n the sample holder and are usually solids or powders.

By use of a manual gas control box two different gases can be applied to the sample and the gas stream can be controlled. A manometer is used to control the pressure on the measuring system. It is scanning the incoming gases with different wave length and measures absorption spectra. These spectra are stored in the computer and are then compared with existing libraries to determine what the evolved gases are. There are a lot of different libraries available that can be purchased for different applications. As standard a general library with 8000 different spectra is delivered with the system....

Details of the Thermal balance L81 Details of the horizontal quartz glass measuring system L40/3052 2 times gas control station with integrated manometer which display the system pressure FTIR - gasanalysis system ( FTIR 460 plus ) Low temperature furnace with temperature range -150°C up to 500 °C, with coupling to a FTIR gasanalysis system