| 螺旋管-高效液相色谱法在线检测甲醛的研究 |
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| 引用本文： | 马亿园,王会祥,王少丽,刘斌.螺旋管-高效液相色谱法在线检测甲醛的研究[J].环境科学与技术,2010,33(5). |
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| 作者姓名： | 马亿园 王会祥 王少丽 刘斌 |
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| 作者单位： | 北京大学环境科学与工程学院,环境模拟与污染控制国家重点实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 研究建立了一种大气环境中气态甲醛在线采样分析系统。该系统通过螺旋管液相吸收和高效液相色谱衍生法,实现了对大气气态甲醛的在线分析。大气中的气态甲醛经过在螺旋管内经液相吸收后,与2,4-二硝基苯肼(DNPH)吸收液在加热条件下充分反应,衍生产物通过高效液相色谱(HPLC)分离后进入紫外检测器(UV)进行检测。采样和分析系统通过DasyLab实现自动运行。该方法可实现在线连续检测,时间分辨率为60min,气态甲醛的检测限可达0.10μg/L。将该方法与乙酰丙酮分光光度法(GB/T15516-1995)进行比对实验,两种方法的检测结果线性相关系数R2=0.9815。采用该方法于2007年10月在北京市进行实际采样分析,得到甲醛浓度平均浓度为4.82μg/L,并呈现明显的日变化,夜间最低,中午及午后较高。
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| 关 键 词： | 甲醛 高效液相色谱 螺旋管 |
Development of an Automated Measurement System Based on a Coil Collector and High Performance Liquid Chromatography for Detection of Formaldehyde in Atmosphere |
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| MA Yi-yuan,WANG Hui-xiang,WANG Shao-li,LIU Bin.Development of an Automated Measurement System Based on a Coil Collector and High Performance Liquid Chromatography for Detection of Formaldehyde in Atmosphere[J].Environmental Science and Technology,2010,33(5). |
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| Authors: | MA Yi-yuan WANG Hui-xiang WANG Shao-li LIU Bin |
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| Abstract: | A continuous determination system of atmospheric formaldehyde was established based on high performance liquid chromatography(HPLC). The sampling system employs scrubbing coil to trap atmospheric formaldehyde into an acid solution of 2, 4-dinitrophenylhydrazine (DNPH). Reaction between formaldehyde and DNPH produces a stable product which is determined by reverse-phase HPLC and UV detection. All measurement operations are controlled by DasyLab. The automated measurement can be performed at 60min intervals. The detection limit was 0.10μg/L. The concentration of formaldehyde was determined with the method. The average concentration is 4.82μg/L, and showed obvious diurnal variation in October,2007. |
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| Keywords: | formaldehyde HPLC coil |
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