Inorganic reagents, gases

Reagents and indicators are immobilized, occluded or dissolved in supports which are formed by cross-linked polymers, plasticized polymers or organic and inorganic activated surfaces. The waveguide itself, the cladding of an optical fiber or any other optical element can be the support. However, it must obey two basic functions act as a liquid-solid or gas-solid interface and, if radiation crosses through it to allow the signal transmission, be an optically transparent material. 

Reagent A common partner of the reactant in many chemical reactions. It may be organic or inorganic small or large gas, liquid or solid. The portion of a reagent that ends up being incorporated in the product may range from all to very little or none. 

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