顶空-气相色谱法测定底泥中氰化物含量  

Determination of Cyanide in Sediment by Headspace Gas Chromatography

作　　者：赵治兵[1,2] 王瑞[1,2] 刘晓燕[1,2] 刘志刚[1,2] 马立志[1,2] 

机构地区：[1]贵阳学院食品与制药工程学院,贵州贵阳550003 [2]贵州省果品加工工程技术研究中心,贵州贵阳550003

出　　处：《贵州农业科学》2015年第4期68-70,74,共4页Guizhou Agricultural Sciences

基　　金：贵州省教育厅项目"贵州省食品科学与工程重点学科建设"[黔学位合字ZDXK(2014)13]

摘　　要：为建立一种快速、准确的测定底泥中的氰化物方法,采用顶空-气相色谱法对底泥中的氰化物进行测定。结果表明:将底泥经纯水超声、萃取、离心后取上层清液置于50mL顶空瓶中,加入衍生化试剂、置于45℃恒温水浴中,反应、平衡25min,抽取顶空气体100μL注入气相色谱仪配电子捕获检测器进行测定的标准加入回收率为97.36%,方法精密度为3.43%,方法检出限为0.3ug/kg,该方法简单、快速、对人体伤害小。To establish a rapid,accurate method for the determination of cyanide in the sediment, cyanide was determined in sediment by headspace gas chromatography. Results： The sediment was ultrasounded by pure water,extracted and centrifuged.Taking the supernatant to 50 mL headspace bottle,adding derivatization reagent,constant temperature water bath at 45℃,reaction,equilibrium 25 min.100 μL headspace gas wa injected into the gas chromatograph and measured by the electron capture detector.The rate of recovery is 97.36%,precision is 3.43%,detection limit of the method is 0.3 ug/kg, this method is simple and rapid with less damage to human body.

关 键 词：底泥 顶空气相法 衍生化 

分 类 号：O657.7[理学—分析化学]