纳米复合材料催化发光法测定空气中的苯系物  

Determination of BTX in air utilizing cataluminescence on nanometer composite materials

作　　者：周考文[1] 赵艳霞[1] 徐峥[1] 佟岳[1] 

机构地区：[1]北京联合大学生物化学工程学院,北京100023

出　　处：《分析试验室》2006年第1期13-16,共4页Chinese Journal of Analysis Laboratory

摘　　要：基于苯系物在纳米材料上的催化发光现象，建立了一种快速测定空气中苯系物的方法。在铜锰铁复合纳米材料上的最佳测定条件为：检测波长460nm，表面温度320℃，气体流速120mL/min。方法的检出限（3σ）为0．5mg／m^3，线性范围为1～80mg／m^3，相关系数为0．9995。对常见共存物的研究表明，方法有较好的选择性。A new method based on cataluminescence （CTL） generated on the surface of nanometer materials is proposed for direct determination of BTX （benzene, toluene, p-xylene, o-xylcnc, m-xylene） in air. The optimum experimental conditions were tested. Selective determination could be achieved at a wavelength of 460 nm. The surfacc temperature of nanosized materials is about 320℃ The flow rate of cartier air is around 120 mL/min. The limit of detection of this method is 0.5 mg/m^3 . The linear range of CTL intensity versus concentration of benzene is 1 - 80 mg/m^3 , and the correlation coefficient is 0. 9995. The recovery of testing 5 standard benzene samples by this method is 98.8 % - 101. 0%. Common coexisting matters, such as carbon monoxide, sulfur dioxide, formaldehyde, methanol and so on, do not disturb the determination of BTX. This method allows rapid determination of BTX in air.

关 键 词：苯系物 催化发光 纳米复合材料 

分 类 号：O657.32[理学—分析化学]