Abstract
The effects of flow rate, flow direction, flow ratio, pressure, membrane area, channel depth and channel shape on the optimization of gas-diffusion flow-injection systems are described in detail. A nonreacting chemical system, chlorine dioxide, was used to study the physical dispersion of the gas-diffusion systems. It was found that slow flow rates and shallow channels are optimal. Stopped-flow conditions in a nonreacting chemical system may not be worth the cost in time. For chemical systems in which the analyte is consumed, the optimized parameters included stopped flow.
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