公开(公告)号：US5204265A

公开(公告)日：1993-04-20

申请号：US933884

申请日：1992-08-21

申请人： Alan Nelson ,  Henry K. Hui ,  Monte Bennett ,  Soonkap Hahn ,  Charles S. Bankert

发明人： Alan Nelson ,  Henry K. Hui ,  Monte Bennett ,  Soonkap Hahn ,  Charles S. Bankert

IPC分类号： A61B5/00 ,  G01N21/77 ,  G01N33/00

CPC分类号： G01N21/7703 ,  A61B5/1455 ,  A61B5/1495 ,  G01N33/0006 ,  G01N2201/127 ,  Y10T436/10 ,  Y10T436/102499

摘要： The method of stabilizing a carbon dioxide sensor involves treatment of the sensor to reduce the instability that may occur in carbon dioxide sensors when such sensors are exposed to either very low or very high carbon dioxide levels for extended periods of time. This is accomplished by storing the sensor in an aqueous solution containing at least 2 weight percent carbon dioxide, for from several days to several months. The solution may be prepared in advance, or may be dynamically infused with carbon dioxide to provide the desired carbon dioxide content.

摘要翻译： 稳定二氧化碳传感器的方法包括处理传感器以减少在二氧化碳传感器中长时间暴露于非常低或非常高的二氧化碳水平时可能发生的不稳定性。 这通过将传感器储存在含有至少2重量％二氧化碳的水溶液中来实现，从几天到几个月。 该溶液可以预先制备，或者可以动态地注入二氧化碳以提供所需的二氧化碳含量。

公开(公告)号：US5246859A

公开(公告)日：1993-09-21

申请号：US888550

申请日：1992-05-22

申请人： Alan Nelson ,  Henry K. Hui ,  Monte Bennett ,  Soonkap Hahn ,  Charles S. Bankert ,  Jeffrey T. Jackson

发明人： Alan Nelson ,  Henry K. Hui ,  Monte Bennett ,  Soonkap Hahn ,  Charles S. Bankert ,  Jeffrey T. Jackson

IPC分类号： A61B5/145 ,  A61B5/1459 ,  G01N31/22 ,  G01N33/49 ,  G01N33/84

CPC分类号： G01N33/84 ,  G01N31/223 ,  Y10T436/102499 ,  Y10T436/108331 ,  Y10T436/20 ,  Y10T436/204998 ,  Y10T436/255

摘要： The method of stabilizing a carbon dioxide sensor involves formulation of a bicarbonate buffer solution in the sensor with a bicarbonate ion concentration of from about 100 mM to about 200 mM bicarbonate. The method also involves treatment of the sensor to reduce the instability that may occur in carbon dioxide sensors when such sensors are exposed to either very low or very high carbon dioxide levels for extended periods of time. The sensor is treated by exposing the sensor to an aqueous solution containing at least 2 weight percent carbon dioxide, for from several days to several months. The solution may be prepared in advance, or may be dynamically infused with carbon dioxide to provide the desired carbon dioxide content.

摘要翻译： 稳定二氧化碳传感器的方法包括在传感器中配制碳酸氢盐缓冲溶液，碳酸氢根离子浓度为约100mM至约200mM碳酸氢盐。 该方法还涉及传感器的处理，以减少二氧化碳传感器当这种传感器长时间暴露于非常低或非常高的二氧化碳水平时可能发生的不稳定性。 通过将传感器暴露于含有至少2重量％二氧化碳的水溶液中来处理传感器，持续数天至数月。 该溶液可以预先制备，或者可以动态地注入二氧化碳以提供所需的二氧化碳含量。

公开(公告)号：US5326531A

公开(公告)日：1994-07-05

申请号：US989102

申请日：1992-12-11

申请人： Soonkap Hahn ,  Alan Nelson ,  Monte Bennett ,  Henry K. Hui

发明人： Soonkap Hahn ,  Alan Nelson ,  Monte Bennett ,  Henry K. Hui

IPC分类号： A61B5/00 ,  G01N21/64 ,  G01N21/77 ,  G01N21/00 ,  G01N33/50

CPC分类号： G01N21/643 ,  A61B5/1455 ,  G01N21/7703 ,  G01N2021/772 ,  G01N2021/7786

摘要： The carbon dioxide sensor includes a CO.sub.2 sensing matrix formed from a hydrophilic, gas permeable, cross-linked polyurethane. The polyurethane matrix is formed from a polyurethane pre-polymer mixture which cross links when mixed with an aqueous carbon dioxide buffer solution. The dye-buffer solution is physically entrapped as a homogeneous dispersion in the polymer matrix. The matrix is applied to the exposed glass core of an optical fiber, which may first be coated with a primer to allow the polyurethane matrix to bond firmly to the tip of the optical fiber. The hydrophilic polymeric matrix is preferably coated with a hydrophobic material to help avoid leaching of the dye from the matrix, and to prevent diffusion of hydronium ions into the sensing matrix. The hydrophobic polymer overcoat may thereafter be cured by heat treatment. The hydrophobic coating may also contain a light reflective material such as TiO.sub.2.

摘要翻译： 二氧化碳传感器包括由亲水的，透气的交联聚氨酯形成的CO 2感测基质。 聚氨酯基质由与二氧化碳水溶液溶液混合时交联的聚氨酯预聚物混合物形成。 染料缓冲溶液在聚合物基质中物理截留为均匀分散体。 将基质施加到光纤的暴露的玻璃芯上，其可以首先用底漆涂布，以使聚氨酯基质牢固地结合到光纤的末端。 亲水性聚合物基质优选用疏水材料涂覆以帮助避免染料从基质中浸出，并防止水合氢离子扩散到感测基质中。 此后，疏水聚合物外涂层可以通过热处理固化。 疏水涂层还可以含有诸如TiO 2的光反射材料。