Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan.
Anal Chem. 2010 Apr 15;82(8):3315-9. doi: 10.1021/ac100123u.
Preparation and analysis of standard VOC (volatile organic compound) gases are needed when developing and evaluating the performance of analytical methods or instruments to detect VOCs. In this study, we designed and developed a simple system for the analysis of VOCs based on their decomposition into CO(2) by a combustion catalyst and their subsequent detection using a solid electrolyte CO(2) sensor. In this sensor, NASICON (Na(3)Si(2)Zr(2)PO(4); Na(+) conductor) and binary carbonate (Li(2)CO(3)-BaCO(3)) were used as the solid electrolyte and the sensing layer, respectively. This developed system proved to be effective in determining the concentrations of standard gases, including VOCs (ethanol, formaldehyde, and toluene), CO, and hydrocarbons in parts per million concentrations (10-500 ppm). The system also could continuously monitor the variations in ethanol vapors prepared by a diffusion method where liquid ethanol was heated at 25 and 50 degrees C. The advantages and limitations of our developed analytical system are also discussed.
在开发和评估用于检测 VOC 的分析方法或仪器的性能时，需要对标准 VOC（挥发性有机化合物）气体进行制备和分析。在这项研究中，我们设计和开发了一种基于燃烧催化剂将 VOC 分解为 CO(2)，然后使用固体电解质 CO(2)传感器检测 CO(2)的简单 VOC 分析系统。在这种传感器中，NASICON（Na(3)Si(2)Zr(2)PO(4)；Na(+)导体）和二元碳酸盐（Li(2)CO(3)-BaCO(3)）分别用作固体电解质和传感层。该开发系统被证明可以有效地测定标准气体（包括 VOC（乙醇、甲醛和甲苯）、CO 和碳氢化合物）的浓度，浓度范围为百万分之几（10-500 ppm）。该系统还可以通过扩散法连续监测由加热液体乙醇（25 和 50 摄氏度）制备的乙醇蒸气的变化。我们还讨论了开发的分析系统的优点和局限性。
