Fuel Tank Analysis Optowares’ is developing a Fourier transform infrared spectroscopy (FTIR) optical system for on-line analysis of fuel and contaminants in the fuel tank. Optoware’s FTIR technology is based on attenuated total internal refraction (ATR-FTIR) technology, with spatial resolution sufficient for quantitation of microbial contamination with species specificity. ATR-FTIR is a technique is commonly used to provide fundamental information on the molecular structure of organic and inorganic components adhere to an ATR crystal surface.