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水的臭味分为几个等级
更新时间: 2020-11-06 00:00:00  

臭气等级是指以嗅阙值为基准,依人的嗅觉确定的臭气强度的若干等级。通常将臭气强度分为六级:0一无臭,1-检知阙值,2一认知阙值,3一明显检知,4一强臭,5一剧臭。如氨浓度为lppm定为2.5级,2ppm定为3级,5ppm定为3.5级。各种臭气的臭气等级超过2.5一3.5级,即认为大气受到臭气污染,需采取防治措施。

关键词: 臭味 分为 等级

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