Liquid phase reactions ionic strength dependence

The reaction rate constant k is not truly a constant, but is merely independent of the concentrations of the species involved in the reaction. The quantity k is also referred to as the specific reaction rate (constant). It is almost always strongly dependent on temperature. In gas-phase reactions, it depends on the catalyst and may be a function of total pressure. In liquid systems it can also be a function of total pressure, and in addition can depend on other parameters, such as ionic strength and choice of solvent. These other variables normally exhibit much less effect on the specific reaction rate than does temperature, so for the purposes of the material presented here it will be assumed that A depends only on temperature. This assumption is valid in most laboratory and industrial reactions and seems to work quite well. 

Liquid phase chemiluminescence detectors usually consist of a postcolumn reactor (section 5.8) connected to a fluorescence detector with its source disabled [104,137,138,143-145]. The column eluent is combined with one or several reagents that initiates the desired chemiluminescence reaction. The intensity of light emission depends on the rate of the chemical reaction, the efficiency of production of the excited state, and the efficiency of light emission from the excited state. The chemiluminescence intensity is sensitive to environmental factors such as temperature, pH, ionic strength, and solution composition. In addition, the detection system has to be designed to accommodate the time dependence of the chemiluminescence signal to ensure that adequate and representative emission occurs in the detector flow cell. 

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