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１９９７年，对即墨市市区３２０家饭店、宾馆冷菜拼盘制作间空气消毒与污染状况进行了调查。不作空气消毒者达１９２家，仅１２８家采用紫外线消毒，其中１２家紫外线灯辐照度值＜７０μＷ／ｃｍ２。检测空气细菌总数，消毒者中紫外线强度够与不够及不消毒者超标（＞５００ｃ
In 1997, an investigation was conducted on the air disinfection and pollution among the 320 restaurants and hotels in the downtown area of Jimo City. 192 were not air sterilized, only 128 were disinfected with UV light, of which 12 were UV irradiance <70μW / cm2. Detection of the total number of bacteria in the air, disinfection UV intensity enough and not enough and non-disinfectant exceeded (> 500c