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首页> 外文期刊>CHROMATOGRAPHY >Sample Preparation of Volatile Organic Compounds in Air Samples with a Novel Polyimide-Packed Cartridge Designed for the Subsequent Analysis in Capillary Gas Chromatography
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Sample Preparation of Volatile Organic Compounds in Air Samples with a Novel Polyimide-Packed Cartridge Designed for the Subsequent Analysis in Capillary Gas Chromatography

机译：用新型聚酰亚胺填充的小柱设计空气样品中挥发性有机化合物的样品制备，该小柱设计用于随后的毛细管气相色谱分析

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Spherical polyimide particles have been synthesized as an extraction medium of volatile organic compounds (VOCs) in air samples. The polyimide was prepared with the starting materials of pyromellitic dianhydride (PMDA) and 4,4'-diaminodiphenyl ether (4,4'-oxydianiline, ODA), resulting spherical particles having an average diameter of about 5 μm. Packed into a laboratory made mini-extraction tube, the synthesized PMDA-ODA particles were employed as the adsorbent for the subsequent analysis in capillary gas chromatography. The extraction capacities for acetone, hexane, toluene are 0.42, 0.24, 0.78 μmol/g, respectively. The recoveries for these typical organic compounds are more than about 95%. The results clearly showed a good adsorption ability of the PMDA-ODA particles to typical VOCs frequently found in indoor environments, suggesting a future possibility to develop a more miniaturized sample preparation device specially-designed for on-site sampling of indoor air samples.
机译：球形聚酰亚胺颗粒已被合成为空气样品中挥发性有机化合物（VOC）的提取介质。聚酰亚胺用均苯四甲酸二酐（PMDA）和4,4'-二氨基二苯醚（4,4'-氧二苯胺，ODA）的起始原料制备，得到的球形颗粒的平均直径为约5μm。将合成的PMDA-ODA颗粒装入实验室制造的微型萃取管中，用作吸附剂，用于随后在毛细管气相色谱法中进行分析。丙酮，己烷，甲苯的萃取容量分别为0.42、0.24、0.78μmol/ g。这些典型的有机化合物的回收率超过约95％。结果清楚地表明，PMDA-ODA颗粒对常见于室内环境中的典型VOC具有良好的吸附能力，这表明将来有可能开发出专门为室内空气样品现场采样而设计的更加小型化的样品制备设备。

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