CHEMICAL SENSOR AND COATING FOR SAME
    3.
    发明申请
    CHEMICAL SENSOR AND COATING FOR SAME 审中-公开
    化学传感器和涂料相同

    公开(公告)号:WO2001025772A1

    公开(公告)日:2001-04-12

    申请号:PCT/US2000025906

    申请日:2000-09-21

    Abstract: An acoustic wave based-chemical sensor containing a crystal substrate and a coating of small particulate matter is disclosed. The small particulate matter can be graphite particles. Transducers are connected to the crystal substrate to generate an alternating potential across the crystal substrate, which in turn causes the crystal to resonate due to the converse piezoelectric effect. The coating absorbs the analyte, thus changing the mass of the sensor, and accordingly changing its resonant frequency. The transducers detect this change in resonant frequency to indicate that the analyte is present. The use of small particulate matter results in a coating having a large surface area which facilitates mass uptake of large amounts of VOCs, improved acoustic properties even with relatively thick coatings, and a high operational temperature range.

    Abstract translation: 公开了一种包含晶体衬底和小颗粒物质涂层的基于声波的化学传感器。 小颗粒物可以是石墨颗粒。 传感器连接到晶体衬底以在晶体衬底之间产生交替电位,这又导致晶体由于相反的压电效应而谐振。 涂层吸收分析物,从而改变传感器的质量,从而改变其共振频率。 传感器检测谐振频率的这种变化,以表明分析物存在。 使用小的颗粒物质可形成具有大表面积的涂层,其有利于大量挥发性有机物的吸收,甚至在相对较厚的涂层和较高的操作温度范围内也改善了声学性能。

    ION CHROMATOGRAPHIC SEPARATIONS USING STEP AND LINEAR VOLTAGE WAVEFORMS AT A CHARGE-CONTROLLABLE POLYMERIC STATIONARY PHASE
    4.
    发明申请
    ION CHROMATOGRAPHIC SEPARATIONS USING STEP AND LINEAR VOLTAGE WAVEFORMS AT A CHARGE-CONTROLLABLE POLYMERIC STATIONARY PHASE 审中-公开
    在充电控制聚合态下使用步进和线性电压波形的离子色谱分离

    公开(公告)号:WO1994000215A1

    公开(公告)日:1994-01-06

    申请号:PCT/US1993005936

    申请日:1993-06-22

    Abstract: A method and apparatus for chromatographic separations comprising a conductive-polymer stationary phase for controlled interaction with ionic species. The conductive polymer stationary phase is held at an initial voltage while analyte containing ionic species is added. The ionic species interact with and are held by the stationary phase. Voltage across the stationary phase is varied by linear or step waveforms which alters the stationary phase charge characteristics. Ionic species are selectively released from the stationary phase as its charge characteristics change due to the individual charges of each ionic species. Ionic species released from the stationary phase are flushed from the column by an ionic mobile phase.

    Abstract translation: 一种用于色谱分离的方法和装置,包括用于与离子物质的受控相互作用的导电聚合物固定相。 将导电聚合物固定相保持在初始电压,同时加入含离子物质的分析物。 离子物质与固定相相互作用并由固定相保持。 固定相两端的电压由改变静态相电荷特性的线性或阶跃波形变化。 离子物质由于每个离子物质的单独电荷而随着其电荷特性变化而从固定相中选择性地释放。 从固定相释放的离子物质通过离子流动相从柱中冲洗掉。

    DUAL-WAVELENGTH PHOTOMETER AND FIBER OPTIC SENSOR PROBE
    5.
    发明申请
    DUAL-WAVELENGTH PHOTOMETER AND FIBER OPTIC SENSOR PROBE 审中-公开
    双波长光电测量仪和光纤传感器探头

    公开(公告)号:WO1993006459A1

    公开(公告)日:1993-04-01

    申请号:PCT/US1992007883

    申请日:1992-09-17

    Abstract: A dual wavelength optical sensor for measuring the optical characteristics of sensing films which are responsive to a particular quantity to be measured. The optical sensor includes a light source (16, 18) for producing light outputs at two distinct wavelengths and transmitting twin components of light to first and second outputs. A time-shared optical fiber (26) receives the two distinct wavelengths of light from the first output and carries the light on a time-shared basis to a sensor probe (14). A sample detector (30) receives the two distinct wavelengths of light transmitted from the thin sensing film. A reference detector (34) receives the two distinct wavelengths of light from the second output and monitors the output intensity of the light source. A signal processing system (35) combines the measurements of the optical characteristics of the thin sensing film in response to each of the two distinct wavelengths to provide measurements which account for changes in the optical properties of the thin sensing film.

    Abstract translation: 一种双波长光学传感器,用于测量响应于要测量的特定量的感测膜的光学特性。 光学传感器包括用于产生两个不同波长的光输出的光源(16,18),并将光的双分量传输到第一和第二输出。 时分共享的光纤(26)从第一输出接收两个不同波长的光,并将时间共享的光传送到传感器探头(14)。 样本检测器(30)接收从薄感测膜传输的两种不同波长的光。 参考检测器(34)接收来自第二输出端的两个不同波长的光,并监视光源的输出强度。 信号处理系统(35)响应于两个不同波长中的每一个组合了薄感测膜的光学特性的测量,以提供考虑薄感测膜的光学性质变化的测量。

    DUAL-WAVELENGTH PHOTOMETER AND FIBER OPTIC SENSOR PROBE
    6.
    发明公开
    DUAL-WAVELENGTH PHOTOMETER AND FIBER OPTIC SENSOR PROBE 失效
    双波长光度计和光纤传感器。

    公开(公告)号:EP0604582A1

    公开(公告)日:1994-07-06

    申请号:EP92920962.0

    申请日:1992-09-17

    Abstract: Capteur optique à double longueur d'onde servant à mesurer les caractéristiques optiques des couches détectrices sensibles à une certaine grandeur à mesurer. Le capteur comprend une source lumineuse (16, 18) produisant des sorties lumineuses ayant deux longueurs d'onde distinctes, et émettant une paire de composantes lumineuses vers une première et une seconde sortie. Une fibre optique exploitée en temps partagé (26) reçoit la lumière ayant deux longueurs d'ondes distinctes et étant émise par la première sortie, et transmet cette lumière, dans des conditions d'exploitation en temps partagé, à une sonde détectrice (14). Un détecteur d'échantillonnage (30) reçoit la lumière ayant deux longueurs d'ondes distinctes et étant émise par la couche mince détectrice. Un détecteur de référence (34) reçoit la lumière ayant deux longueurs d'ondes distinctes et étant émise par la seconde sortie, et contrôle l'intensité à la sortie de la source lumineuse. Un système de traitement de signaux (35) associe les unes aux autres les mesures des caractéristiques optiques de la couche mince détectrice en réponse à chacune des deux longueurs d'ondes distinctes, afin de produire des mesures exprimant les variations des caractéristiques optiques de la couche mince détectrice.

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