Ozone rhodamine

Gallic acid (rhodamine-B) Ozone (O3) Bersis Vassiliou [5]... 

On the other hand, Bersis and Vassiliou [5] have attempted to use gallic acid as an ozone acceptor and rhodamine-B as a photon emitter that remains unchanged during the measurement. They used an ethanol solution containing gallic acid and rhodamine-B as reactive reagents, which meant that this method could not be applied to a solid sensor. 

R ozone analysers) or that between O3 and Rhodamine B over silica gel... 

An ozone analyser operates with a high degree of the selectivity, based on a chemiluminescent reaction [15, 30]. Rhodamine B, adsorbed on sihca gel is applied onto a disc, which is then exposed to air containing ozone. Radiation emitted is detected by a photomultiplier. Ozone can be determined on the basis of the ozonolysis of 4-4 -dimethylstilbene to yield anisaJdehyde, which is determined by a spectrophotometric measurement at 510 nm [31]. 

There are some liquid-phase CL methods using dye compounds as a reagent. Ozone can be measured either by passing sample air into an ethanolic solution of rhodamine B and gallic acid or using a rhodamine B impregnated silica disk. CL methods with eosin Y and with coumarin 47 are also reported for rapid... 

Ozone can be determined by its reaction with an adsorbed layer of the dye rhodamine B with a silica gel. Another reaction frequently used in chemical sensors is the reaction of oxygen or hydrogen peroxide with luminol (Fig. 2.21). In combination with enzymatic reactions, highly sensitive and extremely selective sensors can be manufactured. Examples are given in Chap. 8. 

In non-aqueous basic solutions such as DMSO/t-butylate, molecular oxygen alone is sufficient to produce luminol chemiluminescence (cf. p. 102). Reactions producing O2 can be monitored, and a rate of production of 10" moles per second can be recorded [35]. Ozone also produces luminol chemiluminescence [36], but far better results can be obtained using ozone and rhodamine B. 

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