What concentration alarm does the phosphine gas detector give?
What concentration alarm does the phosphine gas detector give? Phosphine is a commonly used high-efficiency fumigation insecticide, widely used in insecticidal operations in fields such as grain, tobacco, Chinese herbal medicine, cotton and hemp. However, due to its highly toxic nature, residual phosphine concentration in the environment needs to be tested after use to protect personnel's health. The occupational exposure limit for phosphine is 0.3mg/m ³， So the first level alarm value of the phosphine gas detection alarm device should be 0.3mg/m ³ Within, the second level alarm value should be within 0.6mg/m ³ Within.
During the storage process of grain, Chinese herbal medicine, and tobacco, if pests are infected to a certain extent, a certain amount of phosphides such as aluminum phosphide, calcium phosphide, and zinc phosphide will be buried under sealed conditions. These phosphides react with the water in the environment to release phosphine gas, achieving the effect of killing pests and insect eggs. Phosphine has high efficacy and significant insecticidal effect on different stages of pests, and is widely used.
During the fumigation process, improper use, poor protection, or accidental penetration may lead to acute poisoning among surrounding operators. In addition, during the production, storage, and transportation of phosphorus metal compounds, phosphine gas may be generated due to poor moisture resistance and high air humidity, leading to phosphine poisoning. So when using phosphorus metal compounds for fumigation to kill insects, it is necessary to strictly follow the operating procedures. After the fumigation is completed, it is necessary to thoroughly ventilate and detoxify, and a phosphine detector can be used to detect it, ensuring that the phosphine in the environment is within a safe range before workers can enter.
The toxicity of phosphine is very strong, mainly entering through the respiratory tract. After ingesting phosphorus metal compounds such as aluminum phosphide, calcium phosphide, zinc phosphide, etc. by mistake, phosphine will be hydrolyzed in the intestine to produce phosphine, which will be absorbed and poisoned by the intestine. Mild poisoning of phosphine can cause symptoms such as cough, chest tightness, nausea, vomiting, insomnia, and fatigue. Moderate poisoning can worsen these symptoms, including drowsiness, consciousness disorders, and convulsions. Severe poisoning may directly cause symptoms such as convulsions, coma, shock, and respiratory failure.
