Phosphine gas detector how much concentration alarm
Phosphine is commonly used as a highly effective fumigant insecticide, widely used in insecticidal operations in grain, tobacco, herbal medicine, cotton and hemp, etc. However, due to its highly toxic nature, it is necessary to detect the residual phosphine concentration in this environment after use to protect personnel health. The occupational exposure limit of phosphine is 0.3mg/m³, so the primary alarm value of phosphine gas detection alarm should be within 0.3mg/m³ and the secondary alarm value should be within 0.6mg/m³.
In the storage process of grain, herbal medicine and tobacco, if the pests are infected to a certain extent, under closed conditions, a certain amount of aluminum phosphide, calcium phosphide, zinc phosphide and other phosphide will be cast and buried, and these phosphide and the water in the environment undergoes a chemical reaction and releases phosphine gas in order to achieve the effect of killing the pests and insect eggs. Phosphine has high efficacy on different insect stages of pests, with significant insecticidal effect and wide application.
In the process of fumigation to kill pests, if the use of improper, poor protection or accidental penetration, etc., may lead to acute poisoning of the surrounding operators. In addition, in the production, storage and transportation of phosphorus metal compounds, due to poor moisture and air humidity and other problems may produce phosphine gas, resulting in phosphine poisoning. Therefore, in the use of phosphorus metal compounds fumigation insecticide must strictly comply with the operating procedures, fumigation after the end of the thorough ventilation and detoxification, available phosphine detector detection, to ensure that the environment of phosphine in the safe range before allowing staff to enter.
Phosphine toxicity is very strong, mainly by the respiratory tract into the accidental consumption of aluminum phosphide, calcium phosphide, zinc phosphide and other phosphorus metal compounds will be hydrolyzed in the intestinal tract to generate phosphine, by intestinal absorption poisoning. Phosphine mild poisoning will appear cough, chest tightness, nausea, vomiting, insomnia, fatigue and other symptoms, moderate poisoning of the above symptoms aggravated, there will be drowsiness, impaired consciousness, convulsions, and so on, severe poisoning may directly appear convulsions, coma, shock, respiratory failure and other related symptoms.
