气相色谱十通阀切换-反吹法测定石脑油中微量MTBE含量
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摘要
采用气相色谱十通阀切换-反吹法,测定了石脑油中微量甲基叔丁基醚(MTBE)的含量,并用外标法进行定量分析。结果表明:在升温速率为10℃/min,温度为240℃,阀切换时间为4.4 min的最佳条件下,该方法线性准确性可达0.999 3,检测下限为0.8μg/g,相对标准偏差小于4%,样品加标回收率为95.8%~103.4%。
The trace methyl tert-butyl ether(MTBE) content of naphtha was determined by gas chromatography ten-valve switching-backflush technology and quantitative analysis was conducted by external standard method. The results showed that under the optimum conditions of heating rate 10 ℃/min,temperature 240 ℃,valve switching time4. 4 min,the linear accuracy reached 0. 999 3,lower limit of detection 0. 8 μg/g,the relative standard deviation was less than 4%,and the sample added recovery was 95. 8%-103. 4%.
The trace methyl tert-butyl ether(MTBE) content of naphtha was determined by gas chromatography ten-valve switching-backflush technology and quantitative analysis was conducted by external standard method. The results showed that under the optimum conditions of heating rate 10 ℃/min,temperature 240 ℃,valve switching time4. 4 min,the linear accuracy reached 0. 999 3,lower limit of detection 0. 8 μg/g,the relative standard deviation was less than 4%,and the sample added recovery was 95. 8%-103. 4%.
引文
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[3]刘文,蒋锐.二维色谱测定石脑油中微量含氧化合物[J].广州化工,2015,43(5):139-141.
[4]李春,彭树红,端裕树,等.气相色谱测定石脑油中的微量含氧化合物[J].环境化学,2015,34(10):1973-1974.
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[6]吴翠玲.石脑油中微量含氧化合物测定气相色谱条件的研究与探讨[J].广东化工,2012,39(2):175-176.
[7]郑利红,邓东珍,王琨,等.石脑油中二甲醚、甲醇和甲基叔丁基醚含氧化合物测定方法的建立[J].分析仪器,2015(4):30-34.
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