电子鼻测定植物挥发性有机物方法研究  

Research on the Determination of BVOC_S Using Electronic Nose

作　　者：郭霞[1] 田森林[1] 宁平[1] 蒋蕾[1] 王倩[1] 何姗姗[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《分析科学学报》2012年第4期497-501,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.20607008;21077048);云南省中青年学术技术带头人后备人才培养经费(No.2007PY01-08);昆明理工大学分析测试基金(2010191)

摘　　要：建立了电子鼻技术(GC/SAW)快速实时检测植物挥发性有机物(BVOCS)的分析方法。考察了检测器温度、进样温度、柱温、升温速率等因素的影响,确定了电子鼻技术分析BVOCS的最佳条件为:检测器温度60℃、进样口温度100℃、柱温40～145℃(10℃/s)、阀温145℃、预浓缩管250℃、载气流速3mL/min。在上述条件下,测得不同时间(日内、日间)α-蒎烯和异戊二烯分别在0.027～8.580mg·L-1、0.425～68.100mg·L-1范围内线性良好;α-蒎烯和异戊二烯的回收率分别在90.74%～107.41%和91.29%～102.88%之间;相对标准偏差(RSD)均小于5%;检测限在0.2～1.0μg·L-1内。A method for the determination of plant volatile organic compounds（BVOCs）by electronic nose technology（GC/SAW） was established. The optimal analytical conditions were ascertained to be that the temperature of sensor, inlet, valve and pre-concentration tube were 60 ℃, 100 ℃, 145 ℃ and 250 ℃ ,column temperature was increased from 40 to 145 ℃ （10 ℃/s）,and the flow rate of carrier gas （He） was 3 mL/min. The good linear relationships in the range of 0. 027-8. 580 mg· L-1 for a-pinene and in the range of 0. 425~68. 100 mg-L 1 for isoprene were obtained accompanied by the recovery of 90.74%107.41% for a-pinene and 90.3%~97.4% for isoprene,with the relative standard deviations （RSD） at less than 5.0%. And the limits of detection were both in the range of 0.2-1.0 ·g .L-1. The method was simple, fast, highly sensitive and reproducible.

关 键 词：电子鼻 表面声波检测器(SAW) 植物挥发性有机物(BVOCs) 

分 类 号：O657[理学—分析化学]