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    • 7. 发明申请
    • Detection and Molecular Weight Determination of Organic Vapors
    • 有机蒸汽的检测和分子量测定
    • US20130303402A1
    • 2013-11-14
    • US13980068
    • 2012-01-19
    • Isiah M. WarnerBishnu P. RegmiBilal El-ZahabDaniel J. Hayes
    • Isiah M. WarnerBishnu P. RegmiBilal El-ZahabDaniel J. Hayes
    • B01J20/22
    • B01J20/22G01N29/022G01N29/036G01N33/0047G01N2291/021G01N2291/0426
    • Composite films comprising an organic salt (or GUMBOS) such as 1-n-butyl-2,3-dimethylimidazolium hexafluoro-phosphate and a polymer such as cellulose acetate are prepared. These films are useful in detecting vapors of volatile organic compounds, and in determining their molecular weights. A quartz crystal microbalance-based sensor was designed by depositing a thin film of this composite material on the gold electrode surface of a quartz crystal resonator. The sensor exhibited rapid response toward a variety of volatile organic compounds, and complete regeneration, high sensitivity, low detection limits, and wide dynamic ranges. The ratio of the change in frequency to the change in motional resistance is a concentration-independent quantity that is proportional to the molecular weight of the absorbed chemical species. These properties facilitate the easy identification and molecular weight determination of a broad range of organic vapors.
    • 制备包含有机盐(或GUMBOS)如1-正丁基-2,3-二甲基咪唑鎓六氟磷酸盐和聚合物如乙酸纤维素的复合膜。 这些膜可用于检测挥发性有机化合物的蒸气,以及确定其分子量。 通过在石英晶体谐振器的金电极表面上沉积该复合材料的薄膜来设计石英晶体微量天平传感器。 传感器对各种挥发性有机化合物表现出快速反应,完全再生,灵敏度高,检测限低,动态范围广。 频率变化与运动阻力变化的比率是与吸收的化学物质的分子量成比例的浓度非依赖性量。 这些性质有助于容易地鉴定和分子量测定范围广泛的有机蒸气。