Infrared Analysis, Inc. - Specialists inthe measurement of gases. Products : Long-path gas cells - FT-IR gas cells - Gas absorption cells - Heatable gas cells - FT-IR reference spectra - Gas Analysis Programs - Programs for measuring gases using FT-IR spectroscopy - Database of Infrared Reference Sp...

Return SPECTRAL SUBTRACTION The acronym RIAS has two syllables that designate a two-step process: RI for region integration and AS for and subtraction. Before the computer was applied to spectrum processing, the region integration could usually be carried out by hand and eye, but the spectral subtra...

TRANSFER OPTICS Each long path cell has either a mounting fixture or a base plate appropriate for the designated spectrometer. These carry two adjustable transfer mirrors to couple the infrared beam to and from the cell. The cell will be placed in the sample compartment in a position that will allow...

WATER AND CO2 INTERFERENCE REMOVAL The QASoft control screen has action buttons for removal of water and CO2 lines from an air spectrum. It is necessary for the user to prepare the reference spectra that are called by these action buttons. The reason for this is that a good subtraction requires an e...

X-SHIFT The wavenumber scales of the spectra can differ from one FT-IR instrument to the next. (They usually do.) This X-axis error is not usually very large. Frequently the X-shift is only one data point in the spectrum. This will not cause much trouble if one is working with the spectrum of a la...