Research On Detection Limit Of Sulfur Dioxide Based On Ultraviolet Fluorescence Method

Sulfur dioxide concentration in the atmosphere as an important reference to measure the level of air pollution,so accurate and stable detection of sulfur dioxide concentration in the atmosphere is particularly important.The detection of sulfur dioxide for the understanding of our lives around the air environment and assist the environmental protection departments to carry out the work has important significance.UV fluorescence detection of sulfur dioxide concentrations and our international ISO standardized methods.Based on UV fluorescence method developed to detect sulfur dioxide systems abroad started earlier,more advanced technology,currently the most sulfur dioxide concentration was detected by fluorescence-based systems are imported from abroad.In recent years lots of domestic-based research in this area,but also get a lot of research,but these sulfur dioxide detection system still exists a lot of uncertainty of measurement.This paper will detail the entire detection system research and design.Existing detection of sulfur dioxide by ultraviolet fluorescence instrumentation systems have many shortcomings,which will affect the accuracy and long term stability of the whole system.This article will optimize the design based on previous studies,that the detection system is simple to use,high accuracy,reliability purposes.This paper design and build the system to achieve good detection results.Use this experimental platform to study the influence of the size of the system gas path flow of sulfur dioxide gas sulfur dioxide concentration detection analysis system to detect sources of error and how to reduce the error factor.On the basis of experimental results of further analysis and then propose a method to improve the system,reduce the minimum detection limit of sulfur dioxide.