Vapor recognition with an integrated array of polymer-coated flexural plate wave sensors
Vapor recognition with an integrated array of polymer-coated flexural plate wave sensors
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DOI：
10.1016/s0925-4005(99)00381-0
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发表时间：
2000-02-25
影响因子：
8.4
通讯作者：
Zellers, ET
中科院分区：
文献类型：
--
作者：
Cai, QY;Park, J;Zellers, ET
采用六个聚合物涂层的弯曲板波（FPW）传感器和吸附剂预浓缩器的集成阵列的原型仪器的初步测试。响应热解吸样品的个别有机溶剂蒸气和二元和三元蒸气混合物的浓度是线性的，和混合物的响应是相当于的响应的总和的组分蒸气，这在大多数情况下，从预浓缩器共蒸发。从60秒（34厘米（3））的空气样品中可以达到低至0.3 ppm的检测限，半峰宽范围为1至4秒。在不同流速下的测试表明，传感器涂层膜中的蒸汽吸附动力学可能会限制在较高流速下的响应，然而，低数据采集速率也可能是有贡献的。使用独立的测试数据和Monte Carlo模拟与模式识别的阵列性能的评估表明，个别蒸汽和某些二元和三元混合物可以识别/歧视非常低的错误。更复杂的混合物，以及那些含有同源蒸汽的混合物，是有问题的。这是第一份报告，展示了多蒸气分析与集成FPW传感器阵列。(C)2000 Elsevier Science S.A. All rights reserved.
Preliminary testing of a prototype instrument employing an integrated array of six polymer-coated flexural plate wave (FPW) sensors and an adsorbent preconcentrator is described. Responses to thermally desorbed samples of individual organic solvent vapors and binary and ternary vapor mixtures are linear with concentration, and mixture responses are equivalent to the sums of the responses of the component vapors, which co-elute from the preconcentrator in most cases. Limits of detection as low as 0.3 ppm are achieved from a 60-s (34 cm(3)) air sample and peak widths at half-maximum range from 1 to 4 s. Tests at different flow rates suggest that the kinetics of vapor sorption in the sensor coating films may limit responses at higher flow rates, however, low data acquisition rates may also be contributory. Assessments of array performance using independent test data and Monte Carlo simulations with pattern recognition indicate that individual vapors and certain binary and ternary mixtures can be recognized/discriminated with very low error. More complex mixtures, and those containing homologous vapors, are problematic. This is the first report demonstrating multi-vapor analysis with an integrated FPW sensor array. (C) 2000 Elsevier Science S.A. All rights reserved.