| 气相色谱法同时测定甲醇中共存杂质和微量芳烃 |
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| 引用本文： | 曹喜焕,张永夏,宋乐林,施文杰,叶忠伟.气相色谱法同时测定甲醇中共存杂质和微量芳烃[J].理化检验(化学分册),2012(5):567-569. |
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| 作者姓名： | 曹喜焕 张永夏 宋乐林 施文杰 叶忠伟 |
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| 作者单位： | 太仓出入境检验检疫局 |
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| 摘 要： | 提出了甲醇中共存杂质(丙酮、乙酸甲酯、乙醇)和微量芳烃(乙苯、对二甲苯、间二甲苯和邻二甲苯)含量的气相色谱测定方法。用INNOWAX色谱柱,采取程序控制柱温升温,用氢火焰离子检测器,各种化合物完全分离。丙酮、乙酸甲酯和乙醇的线性范围为4.0～20mg.L-1,各芳烃化合物的线性范围为0.4～2.0mg.L-1。方法用于甲醇样品的分析,加标回收率在88%～114%之间,相对标准偏差(n=7)为2.56%～4.68%。
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| 关 键 词： | 气相色谱法 芳烃 共存杂质 甲醇 |
GC Simultaneous Determination Co-existing Impurities and Micro-amount of Aromatic Hydrocarbons in Methanol |
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| CAO Xi-huan,ZHANG Yong-xia,SONG Le-lin,SHI Wen-jie,YE Zhong-wei.GC Simultaneous Determination Co-existing Impurities and Micro-amount of Aromatic Hydrocarbons in Methanol[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2012(5):567-569. |
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| Authors: | CAO Xi-huan ZHANG Yong-xia SONG Le-lin SHI Wen-jie YE Zhong-wei |
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| Institution: | (Taicang Entry-Exit Inspection and Quarantine Bureau,Taicang 215400,China) |
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| Abstract: | Three co-existing impurities(i.e.,acetone,methyl acetate and ethanol) and 4 aromatic hydrocarbons(i.e.,ethyl benzene,p-xylene,m-xylene and o-xylene) in methanol were determined by gas chromatography,with INNOWAX capillary column and FID detector under programmed column temperature elevation.Under the optimum analytical conditions,the 7 compounds were successfully separated.Linearity ranges were obtained between 4.0 and 20 mg·L-1 for acetone,methyl acetate and ethanol,and between 0.4 and 2.0 mg·L-1 for the 4 aromatic hydrocarbons.The proposed method was used in the analysis of methanol samples,giving recovery obtained by standard addition method in the range of 88%-114% with RSD′s(n=7) in the range of 2.56%-4.68% respectively. |
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| Keywords: | GC Aromatic hydrocarbons Co-existing impurities Methanol |
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