Sulfur dioxide isThe most common, simple and irritating sulfur oxidesThe chemical formula isSO2It is a colorless gas and one of the main gases of atmospheric environmental pollution.
With the vigorous development of our country's modern economy, the country pays more and more attention to the problem of sustainable development, and the policy on environmental pollution is becoming more and more perfect.Volcanoes erupt when they eruptSulphur dioxideSulfur dioxide is also produced in many industrial processes. Since coal and oil usually contain sulfur, sulfur dioxide is produced when burned. When sulfur dioxide is dissolved in water, sulfurous acid is formed. If sulfurous acid is further oxidized in the presence of PM2.5, sulfuric acid (the main component of acid rain) will be generated quickly and efficiently.So at present, when we use these energy sources, the most worrying thing is that acid rain will be produced, which will cause irreversible pollution to the environment.

Sulfur dioxide is also a toxic gas. When sulfur dioxide enters the respiratory tract, it is easily soluble in water, so most of it is blocked in the upper respiratory tract, and corrosive sulfurous acid, sulfuric acid and sulfate are generated on the moist mucosa, which enhances the irritation. The smooth muscle of the upper respiratory tract has peripheral nerve receptors, and when stimulated, it will produce a narrowing reaction, which narrows the lumen of the trachea and bronchi and increases airway resistance. Sulfur dioxide can also be absorbed into the blood, causing toxic side effects on the whole body. It can destroy the activity of enzymes, thus obviously affecting the metabolism of carbohydrates and proteins, and causing certain damage to the liver. After chronic sulfur dioxide poisoning, the body's immune received a significant inhibition. The concentration of sulfur dioxide is10~15ppmrespiratory cilia movement and mucous membrane secretion function has been inhibited. When the concentration reaches20ppmIt is easy to cause cough and irritate the eyes, if the daily inhalation concentration is100ppmof sulfur dioxide8HBronchial and lung irritation symptoms, lung tissue damage. If the concentration is high, it can make people difficult to breathe, and if sulfur dioxide and dust work together, it can promote alveolar fiber hyperplasia. If the hyperplasia covers a wide range, fibrous lesions will be formed, which will develop into emphysema. Now workers in coal mining or chemical plants may face this disease.

In industry, sulfur dioxide still has many uses. It can be used to produce sulfur trioxide, sulfuric acid, sulfite, and thiosulfate. It is also used as a fumigant, preservative, disinfectant, reducing agent, and sulfur dioxide is allowed to be used in my country. The reductive bleaching agent has a bleaching effect on food and a strong inhibitory effect on the oxidase in plant food. Our regulations can be used for wine and fruit wine, the maximum use0.25g/kg, the residual amount shall not exceed0.05g/kgIt is used in pesticides, man-made fibers, dyes and other industrial sectors to produce sulfur and as pesticides and fungicides.

At present, the country has increased the policy on the control of sulfur dioxide emissions. For sulfur dioxide, there are also many testing methods in the market.AlphasenseSulfur dioxide sensorSO2-AF, yes.AlphasenseFor the electrochemical sensor for sulfur dioxide detection, the sensor has a filtering function, and the range is small, high resolution, can be used in coal mines, underground, petroleum, chemical and other places of exhaust gas or environmental detection, can be made into a portable handheld instrument, can also support long-term online monitoring, more main parameters are as follows:

Overload:75ppm

Response time ：

Size:Φ20 × 16.5

SO2 detection range ：0-50ppm

Sensitivity ：300- 550nA/ppm

Resolution: <0.1ppm

Linearity:0~10ppmLinearity, full range linearity error <±0.3ppm