The Torromis 203 (TMS203) equipment is used in matrix isotope separation analysis for the synthesis and spectroscopic study of a wide range of Organic, Inorganic and Organometallic compounds. This equipment has been designed to be suitable for experiments involving the generation and trapping of reactive intermediates and/or products, under solid, liquid or solution phase conditions. Reagents may be conventional gaseous reagents or high temperature metal, metal oxide or metal salt vapors to name a few. Samples and reagents can be subjected to a range of thermal photolytic, x-ray, y-ray, microwave, radiowave, etc. treatments, either during or after a deposition. It has been used extensively in conjunction with conventional uv-visible, fluorescence, grating and Fourier Transform IR, laser Raman, resonance Raman, resonance fluorescence and electron spin resonance spectroscopies.