Control And Analysis Study To Produce And Employ The Chlorine Dioxide

On the basis of the character that chlorine dioxide can absorb special ray, we use the photosensitive resistance and the photosensitive diode to establish a circuit system. This circuit system can detect the concentration of chlorine dioxide solution ranging from 0~4.5g/L, and the content of chlorine dioxide gas ranging from 0-12% (V/V).When we use the photosensitive diode as sensor organ, the rectilinear formular of chlorine dioxide solution and gas are y=0.2625x+0.0103 and y=0.0496x+0.0002; the correlation coefficient(R2) are 0.9994 and 0.9993.When we use the photosensitive resistance as sensor organ, the rectilinear formular of chlorine dioxide solution and gas are y=0.3044x+0.0051 and y=0.053 lx+0.0024; the correlation coefficient(R2) are 0.9988 and 0.9985.At the same time, we switch the resistance into the voltage directly to detect the chlorine dioxide solution and gas.the rectilinear formular are y=0.03043x+0.0068 and y=0.0533x+0.0134;the correlation coefficient(R2) are 0.999 and 0.9987. This method does not demand any reagent so as to manipulate easily. The result is proved to be very good.In acidic medium, malonic acid used as masking agent, let the mixed aqueousof chlorine dioxide and chlorine react with Fe2+, then have the residual Fe2+ coloured with 1.10-phenanthroline solution. We can quantify the content of chlorine dioxide and chlorine in the water by detecting the difference of absorbtivity of the coloured solution when it is no masking agent and it is added masking agent. The rectilinear formular is y=0.7099x - 0.0025 , the correlation coefficient(R2) is 0.9997,the rectilinear range is 5.36×10-3 ~ 1.33mg/L,the least determination is 2.91×10-3mg/L.The method is simple, innocuity, specific, quick, accurate and sensitive.