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一氧化碳为一毒性气体,极微量浓度即具毒性。当空气中含有一氧化碳达0.02—0.05%(容积)时,若长时期接触,就可引致头痛、头晕、心跳加快等症状。达0.1—0.2%时,症状出现加快且加剧,甚至发生呼吸困难、恶心和昏迷。达0.3—0.4%时,可危及生命,在此浓度下经过半小时至一小时即能致命。苏联规定工作场所每升空气中一氧化碳的最大容许量(指危害人体的近似浓度——译者)为0.02—0.03毫克。如工作时间不超过一小时,一氧化碳的最大容许量达0.05毫克/升;不超过半小时者,可达0.1毫克/升;不起过15—20分钟者,可达0.2毫克/升。一氧化碳的毒性在於其与血中血红素的亲和
Carbon monoxide is a toxic gas, a trace concentration that is toxic. When the air contains carbon monoxide 0.02-0.05% (volume), if prolonged exposure, can cause headache, dizziness, rapid heartbeat and other symptoms. At 0.1-0.2%, the symptoms accelerated and intensified, even with dyspnea, nausea and coma. Up to 0.3-0.4%, can be life-threatening, at this concentration after half an hour to one hour can be fatal. The Soviet Union stipulates that the maximum allowable amount of carbon monoxide per liter of air in the workplace is 0.02-0.03 mg. If the working hours of not more than one hour, the maximum allowable carbon monoxide 0.05 mg / l; not more than half an hour, up to 0.1 mg / l; can not afford 15-20 minutes, up to 0.2 mg / l. The toxicity of carbon monoxide lies in its affinity with the heme in the blood