广东化工2023年第4期·160·www.gdchem.com第50卷总第486期酶底物法检测水中总大肠菌群影响因素的探讨吴海鹏(江门公用水务环境股份有限公司,广东江门529000)[摘要]采用酶底物法测定水中总大肠菌群。通过正交实验从样品放置室温时间、培养温度、培养时间和稀释用水等方面探讨酶底物法测定水中总大肠菌群的各种因素的影响。实验表明样品放置室温时间对水中总大肠菌群的测定的影响因素最大,第二为培养温度,第三为培养时间,影响最低的为稀释用水。酶底物法测定水中总大肠菌群的条件为:室温放置时间在20~23min,培养温度在35.0~38.0℃,培养时间在24~28h,采用稀释溶液(爱德士公司)、灭菌生理盐水(自配)来稀释样品。[关键词]酶底物法;总大肠菌群;室温放置时间;培养温度;培养时间[中图分类号]X832[文献标识码]A[文章编号]1007-1865(2023)04-0160-03DiscussiononInfluencingFactorsofDetectingTotalColiforminWaterbyEnzymeSubstrateMethodWuHaipeng(JiangmenPublicWaterEnvironmentCo.,Ltd.,Jiangmen529000,China)Abstract:Theenzymesubstratemethodwasusedtodeterminethetotalcoliformbacteriainwater.Theinfluenceofvariousfactorsonthedeterminationoftotalcoliformbacteriainwaterbyenzymesubstratemethodwasdiscussedfromtheaspectsofroomtemperature,culturetemperature,culturetimeanddilutionwater.Theexperimentshowedthatthetemperatureofthesamplewasthemostinfluentialfactoronthedeterminationoftotalcoliformbacteriainwater.Thesecondwasculturetemperature,thethirdwasculturetime,andthelowestwasdilutionwater.Theconditionsforthedeterminationoftotalcoliformbacteriainwaterbyenzymesubstratemethodwereasfollows:theincubationtimewas20~23minatroomtemperature,theincubationtemperaturewas35.0~38.0℃,andtheincubationtimewas24~28h.Thesamplesweredilutedwithdilutedsolution(IDEXXCo.,Ltd)andsterilizedsaline(self-prepared).Keywords:enzymesubstratemethod;totalcoliform;roomtemperaturestoragetime;culturetemperature;cultivationtime总大肠菌群是指一群在37℃培养24h,能发酵乳糖、产酸产气、需氧和兼性厌氧的革兰氏阴性无芽孢杆菌[1]。天然水体中含有多种微生物,有几万种,大部分对人体有益,只有一小部分能致病。水中致病微生物种类繁多,但数量较少、较易变异和死亡,而且目前还缺乏对这些病原体进行...