【摘要】 研究了单壁碳纳米管(SWCNTs)作为新型采样吸附剂的性能和效果,并应用于空气中挥发性有机化合物的分析测定。结果表明,单壁碳纳米管具有较大的比表面积,与经典Tenax TA吸附剂相比,对低碳数挥发性强的有机化合物回收率高,有更强的吸附能力;空白实验表明,SWCNTs易获得较低本底,具有化学惰性和疏水特性,采样时水的干扰小。当湿度增加时在误差允许的范围内准确度不受影响;实验测定具有较大的穿透容量和安全采样体积。将单壁碳纳米管吸附剂实际应用于大气中挥发性有机化合物的测定,通过与经典吸附剂Tenax TA相比,更适于采集大气中的挥发性有机化合物。更多还原

【Abstract】 The characteristics of single-walled carbon nanotubes (SWCNTs) as novel adsorbent for collecting volatile organic compounds (VOCs) in ambient air have been studied. The results show that SWCNTs have large surface area and high adsorption and desorption efficiencies for collecting VOCs with low boiling points and strong volatility. The background of SWCNTs is very low through blank experiments due to its chemical inertia. The effect of water can be neglected by increasing humidity in the sampling process because of its particular hydrophobicity. SWCNTs have large breakthrough volumes and safe sampling volume. SWCNTs have been successfully applied to collect the VOCs in air.更多还原