Ricerc@Sapienza

The system consists of an FT-IR optical bench equipped with a complete Transfer line system, gas cell and integration system of the gas sampling module. The instrument has the following characteristics.

The optical system consists of a sealed and dissected optical unit; high stable rotary  interferometer and self-compensating for dynamic alignment changes; zero alignment optics with high reflectivity and a low-angle off axis design; a long life source with hot - spot stabilization and easy user replacement. The module is available with a liquid nitrogen cooled MCT (mercury tallium telluride) device to improve sensitivity; the beam splitter is KBr/Gold coated and the material of the optical windows is resistant at high hyumidity environment.
The system includes a software-controlled validation wheel option containing reference materials, traceable to a NIST standard for wavenumber accuracy and a filter for ordinate repeatability.
The wavelenght range is 350 – 8,300 cm-1, the spectral resolution is better than 0,5 cm-1. 

For the gas analysis the instrument is equipped with a 24 Volts heated IR long-path  gas cell equipped with  windows resistant at hugh humidity and digital temperature controller (up to 200°C). The optical light path and internal volume (i.e. 2 meter and 100 ml, respectively) enables to measure ppm order or lower concentrations gas sample. For optimal performance the mirrors are coated with gold to obtain high resistivity and reflectivity. A transfer line to the instrument is also present. In this way the sample passes through a heated line with easily replaceable stainless steel-liner, into the heated gas cell to maintain a constant temperature. Inlet and outlet valves and sensors for pressure measurement in the range 0 - 3 bar, are required to control and keep constant the gas pressure, as it flows through the cell. In order to have the better separation of evolved products, a clear spectra and time resolved data, a balanced flow is necessary. This is carried out by using flow mass controllers for evolved gasses aspiration, filtration and thermal stabilization.  
The transfer line and the instrument can operate in continuous setups and in acidic and corrosive environments and includes trigger cable, digital controller and connectors.
The instrument provides accurate and reliable results and has low-maintenance design; it can monitor very fast reactions and changes as quickly as any scans per second and the sensitivity is part-per million for the most of compounds analyzed. 
All of the functions needed for FT-IR analyses such as instrument control, data collecting and processing and report utilities are inserted in a software platform.