荧光型二氧化硫光纤传感器的研究

Studies on a New Fluorescence Fiber Optic Sensor for Sulfur Dioxide

本文描述了一种新的测量二氧化硫的荧光型光纤传感器。溶于内充液的奎宁被用作敏感物,通过气透膜将内充液与水溶液分开。传感器对二氧化硫的响应范围是3×10^(-6)～3×10^(-4)mol/L。报道了传感器的重现性、稳定性、响应时间和选择性。用该传感器测定了含二氧化硫的实际样品并与碘量法进行了比较。

A new fluorescence fiber optic sensor for sulfur dioxide measurement has been described. Quinine dissolving in internal solution was used as a sensitive material. The internal solution layer was separated from the aqueous solution by a gas-permeable membrane. The response range of the sensor for sulfur dioxide is from 3×10-4 mol/L down to 3×10-6 mol/L. Reproducibility, stability, resp-ponse time and selectivity of the new fiber optic sensor are reported. With this sensor, practical samples containing sulfur dioxide were measured. The results are compared to measurments with iodime-try.