FTIR accessories: gas & solid cells

Transmission cells for measurement of solid specimens Apart from the traditional KBr powder pressing technology, a number of advanced methods are available for transmission spectroscopy. The variable-temperature cell enables samples to be analysed in transmission over a temperature range from -190 °C to 250 °C . The electrical heating jacket is suitable for transmission measurements from room temperature to 250 °C. The high pressure/high temperature cell permits IR spectroscopic analysis at temperatures up to 800 °C and pressures up to 66 bar. Compression cells with diamond window are ideally suited to the analysis of micro solid samples. The cell is placed in an IR microscope or beam condenser for measurement. Gas cells & long-path gas cells Transmission cells with considerably higher path length are required for gaseous samples, due to their low density, and for trace analysis. As far as their construction is concerned, gas measurement cells are standard transmission cells offering the required path length. Long-path gas cells feature a compact design and are based on the White Cell principle, in which the effective path length amounts to several meters. This is achieved by means of three internal mirrors for multiple reflection of the IR light. Heated versions are available to avoid condensation or for analysis, e.g., of decomposition processes.

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