顶空毛细管气相色谱法同时测定水中丙酮甲醇乙腈  

Headspace Capillary Gas Chromatography Method for the Simultaneous Determination of Acetone,Methanol and Acetonitrile in Water

作　　者：姜建彪 朱高云[1] 杨会珠[1] 袁张燊[1] 强杰[1] 

机构地区：[1]石家庄市环境监测中心,河北石家庄050022

出　　处：《环境监测管理与技术》2012年第6期64-66,共3页The Administration and Technique of Environmental Monitoring

摘　　要：采用顶空毛细管气相色谱法同时测定水中丙酮、甲醇和乙腈,确定顶空平衡温度为95℃,平衡时间为30 min,氯化钠质量浓度为200 g/L。丙酮、甲醇和乙腈在0.500 mg/L～5.00 mg/L范围内线性良好,检出限分别为0.02 mg/L、0.10 mg/L和0.04 mg/L,标准溶液平行测定的RSD≤3.0%,两个质量浓度水平的空白加标回收率范围为90%～108%。苯系物对测定不产生影响,吡啶会影响甲醇的测定。Headspace capillary gas chromatography method for the simultaneous determination of acetone in water, methanol and acetonitrile, determined by headspace equilibrium temperature is 95 C, the balance time is 30 rain, sodium chloride concentration was 200 g,/L. Acetone, methanol and acetonitrile in 0. 500 mg/L 5.00 mg/L range of good linearity,detection limit were 0.02 mg/L,0.10 mg/L and 0.04 mg/L, RSD of repli- cate samples of standard 〈3.0% ,two mass concentration levels of blank recoveries ranged from 90% to 108%. BTEX does not affect the the determination results. Pyridine can affect the determination of methanol.

关 键 词：丙酮 甲醇 乙腈 顶空 毛细管气相色谱法 水质 

分 类 号：O657.71[理学—分析化学]