Forensic attenuated total reflection

Diffuse Reflectance, Attenuated Total Reflection or Multiple Internal Reflection, Photoacoustic (PAS), Photothemal Beam Deflection, Specular Reflection Absorption, and forensic applications with the diamond cell and the Fourier transform infrared (FTIR) microscope. In museum laboratories, FTIR applications have been used for problems of identification and degradation in art and archeology. (14)... 

Attenuated Total Reflectance Although DRIFTS is simple and convenient to use, forensic laboratories are adopting another alternative for micro-IR analysis. Attenuated total reflectance (ATR) takes advantage of internal reflections within a sample to create the infrared absorbance spectrum of the sample. An ATR accessory (Figure 5.34) consists of a crystal (sometimes called a prism) made of... 

Owing to these improvements, infrared spectroscopy has undergone a marked development in the last few years because of the possibility of adapting new accessories to the spectrometers and, therefore, of analysing samples whose infrared spectrum was impossible to obtain some years ago. Among these accessories are those which can measure specular and diffuse reflection, attenuated total reflectance and microscopes. One area in which the technique has improved dramatically is forensic analysis. 

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