ATR crystal device

The present invention includes an ATR crystal system comprising: an ATR crystal, one face of the ATR crystal forming a portion of an interior surface of a containment vessel, a radiation source for creating a beam or radiation, the radiation sources optically connected to an input area of the ATR crystal; and a detector for recording the beam of radiation, the detector optically connected to an output area of the ATR crystal. The present invention also includes a method of sample analysis utilizing an ATR crystal embedded in a containment vessel comprising the steps of: providing a containment vessel having an ATR crystal embedded therein; generating a monochromatic beam of light; transmitting the beam to an input of the ATR crystal; transmitting the beam from an output of the ATR crystal to a detector; and recording a signal from the detector.