Chlorofluorocarbon sensor

Figure 16. Chlorofluorocarbon sensor system composed of a pylolyzer and an electrochemical sensor[79].

Sensors or analyzers exist for some of the priority analytes, such as 09, pH, and N03 . The challenge in these cases is to improve sensor stability, response rates, or lifetime. However, for most of the priority analytes, there is no existing sensor or analyzer system that will operate for long time periods without operator intervention. The development of sensors for most of these analytes, such as chlorofluorocarbons or dissolved iron, must circumvent the difficulties posed by low analyte concentrations or interference from other dissolved material. Development of specific sensing chemistry is the ultimate means of circumventing these problems. 

Chlorofluorocarbon can be measured with usual electrochemical halogen sensors after decomposing chlorofluorocarbon with a platinum heater. Fig. 16... 

Figure 15. Sensitivity of Sn02 sensor doped with and without sulfur for chlorofluorocarbons and interference gases[76].

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