The liquid sample is one of the most common types of samples submitted for analysis and comprises a vast array of pure compounds and solutions. As an example, several liquids are used in an automobile to sustain critical elements such as lubricating the engine or drive train and to supply mundane functions like washing the windows or generating electrical power. This paper will describe the analysis of several solutions used in automobiles. The traditional infrared analysis method for fluid samples is to collect an infrared transmission spectrum of a thin film of the liquid contained between the windows of an infrared liquid cell. Not all liquids, however, can be analyzed with infrared spectroscopy in this manner. For samples that are aqueous, viscous or chemically reactive, an infrared liquid cell is cumbersome and labor intensive. Frequently, special windows with a reduced spectral range must be used and the cell can be difficult to keep clean to prevent cross contamination.