利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

35 条记录 (耗时 0.028 秒)

    Solid phase extraction method and apparatus
    12.
    发明授权
    Solid phase extraction method and apparatus 失效
    固相萃取方法及装置

    公开(公告)号：US5403489A

    公开(公告)日：1995-04-04

    申请号：US81647

    申请日：1993-06-24

    申请人： Donald F. Hagen ,  Craig G. Markell

    发明人： Donald F. Hagen ,  Craig G. Markell

    IPC分类号： G01N1/10 ,  B01D15/00 ,  B01D43/00 ,  B01D61/00 ,  B01D65/00 ,  B01D65/02 ,  C02F1/00 ,  G01N30/00 ,  B01D15/04

    CPC分类号： B01D43/00 ,  B01D15/00 ,  B01D15/08 ,  B01D61/00 ,  B01D65/00 ,  B01D65/02 ,  B01D2321/2083 ,  Y10S210/909

    摘要： A method and apparatus for performing solid phase extraction (SPE) on a fluid that contains solubles and suspended solids. The method includes: (a) providing a volume of fluid that contains solubles and suspended solids, (b) processing the volume of fluid to extract solubles therefrom by the steps comprising: (i) passing a first portion of the volume of fluid through a SPE medium that has first and second sides, the first portion of the volume of fluid passing through the SPE medium from the first side to the second side; and then (ii) passing a second portion of the volume of fluid through the SPE medium from the second side to the first side; and (c) repeating step (b) a plurality of times such that no substantial amount of the suspended solids is removed from the processed volume of fluid and solubles are retained on the SPE medium. The apparatus includes a conduit, a SPE medium located in the conduit, and a fluid flow direction altering mechanism or a SPE rotating mechanism.

    摘要翻译： 在含有可溶物和悬浮固体的流体上进行固相萃取（SPE）的方法和装置。 该方法包括：（a）提供含有可溶物和悬浮固体的体积的流体，（b）通过以下步骤处理流体的体积以从中提取可溶物，所述步骤包括：（i）将流体体积的第一部分通过 SPE介质，其具有第一和第二侧，流体体积的第一部分从第一侧通过SPE介质到第二侧; 然后（ii）将所述体积的流体的第二部分从所述第二侧通过所述SPE介质到所述第一侧; 和（c）多次重复步骤（b），使得没有大量的悬浮固体从处理体积的流体中除去，可溶物保留在SPE介质上。 该设备包括导管，位于导管中的SPE介质，以及流体流动方向改变机构或SPE旋转机构。

    Separation method using controlled pore composite polytetrafluoroethylene article
    13.
    发明授权
    Separation method using controlled pore composite polytetrafluoroethylene article 失效
    使用受控孔复合聚四氟乙烯制品的分离方法

    公开(公告)号：US5207915A

    公开(公告)日：1993-05-04

    申请号：US897110

    申请日：1992-06-11

    申请人： Donald F. Hagen ,  Craig G. Markell ,  William V. Balsimo ,  Louis A. Errede

    发明人： Donald F. Hagen ,  Craig G. Markell ,  William V. Balsimo ,  Louis A. Errede

    IPC分类号： B01D15/08 ,  B01J20/28 ,  G01N30/52

    CPC分类号： B01J20/28033 ,  B01D15/08 ,  B01J20/28028 ,  B01J20/28069 ,  B01J20/28078 ,  B01D15/361 ,  B01D15/40 ,  G01N2030/528

    摘要： A composite article having controlled void volume and mean pore size comprises:(a) polytetrafluoroethylene (PTFE) fibril matrix, and(b) insoluble, non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to PTFE is in the range of 40:1 to 1:4 by weight, the composite article having a porosity in the range of 30 to 80 percent void volume and a mean pore size in the range of 0.3 to 5 micrometers, preferably with at least 90 percent of pores having a size less than 3.6 micrometers.The article is prepared by incorporating lubricant in the precursor admixture in an amount sufficient to exceed the lubricant sorptive capacity of the particles by at least 3 weight percent and up to an amount at which the mass loses its integrity.

    摘要翻译： 具有控制的空隙体积和平均孔径的复合制品包括：（a）聚四氟乙烯（PTFE）原纤维基质，和（b）不溶的不溶胀的吸附颗粒，其嵌入所述基质中，非溶胀性吸附颗粒与PTFE的比例为 在40:1至1:4的范围内，该复合制品的孔隙率在30至80％范围内，空隙体积和平均孔径在0.3至5微米的范围内，优选至少为90％ 的孔尺寸小于3.6微米。 该制品通过将前体混合物中的润滑剂以足以超过颗粒的润滑剂吸附能力至少3重量％的量并且高达质量损失其完整性的量来制备。

    Method of preparing composite chromatographic article
    14.
    发明授权
    Method of preparing composite chromatographic article 失效
    复合色谱制品的制备方法

    公开(公告)号：US4971736A

    公开(公告)日：1990-11-20

    申请号：US421280

    申请日：1989-10-13

    申请人： Donald F. Hagen ,  Steven J. St. Mary ,  Louis A. Errede

    发明人： Donald F. Hagen ,  Steven J. St. Mary ,  Louis A. Errede

    IPC分类号： B01J20/28

    CPC分类号： B01J20/28033 ,  B01J20/28028 ,  B01J20/282 ,  Y10S264/62

    摘要： A composite chromatographic sheet-like article is prepared by the steps comprising blending one or more non-swellable sorptive hydrophobic particulate materials in the presence of an amount of polar organic masking agent sufficient to allow rapid wetting of the surface of the particulate and in the presence of sufficient lubricant water to exceed the sorptive capacity of the particulate, provided that the volume ratio of water to masking agent does not exceed 3:1, adding with stirring an aqueous emulsion of polytetrafluoroethylene so that the resulting mass has a dough-like consistency, mixing the mass in an intensive mixer at a temperature between 50 C. and 100 C. for a time sufficient to cause fibrillation of the polytetrafluoroethylene particles, biaxially calendering the mass, while maintaining water at a level near the absorptive capacity of the particulate, between a gap in the calendering rolls maintained at about 50 C. to about 100 C. to cause additional fibrillation and consolidation of the polytetrafluoroethylene particles while closing the gap with each successive calendering operation, for a time sufficient to produce a composite chromatographic article having a net surface energy in the range of 20 to 300 milliNewtons per meter, and drying the resultant sheet.

    摘要翻译： 通过以下步骤制备复合色谱片状制品，所述步骤包括在一定量的极性有机掩蔽剂的存在下共混一种或多种不溶胀的吸附性疏水性颗粒材料，所述极性有机掩蔽剂足以允许颗粒表面的快速润湿 足够的润滑剂水超过颗粒的吸附能力，条件是水与掩蔽剂的体积比不超过3:1，在搅拌下加入聚四氟乙烯的水性乳液，使得所得物料具有面团状稠度， 在密集混合器中在50℃和100℃之间的温度下混合物料一段足以使聚四氟乙烯颗粒原纤化的时间，双轴压延该物料，同时将水保持在接近颗粒的吸收能力的水平之间， 压延辊中的间隙保持在约50℃至约100℃，以引起额外的原纤维化和辅助 同时在每个连续的压延操作中封闭间隙的同时，足以产生净表面能为20-300毫牛顿每米的复合色谱制品，并干燥所得到的片材。

    Composite reactive articles for the determination of cyanide
    18.
    发明授权
    Composite reactive articles for the determination of cyanide 失效
    用于测定氰化物的复合反应物品

    公开(公告)号：US5340746A

    公开(公告)日：1994-08-23

    申请号：US2198

    申请日：1993-01-08

    申请人： Donald F. Hagen ,  Louis C. Haddad ,  Robert E. Perkins ,  Craig G. Markell

    发明人： Donald F. Hagen ,  Louis C. Haddad ,  Robert E. Perkins ,  Craig G. Markell

    IPC分类号： G01N31/00 ,  G01N31/16 ,  G01N31/22 ,  G01N33/00

    CPC分类号： G01N31/22 ,  Y10T436/172307

    摘要： Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can be particulate, porous fibrous membranes, or solution-cast membranes. Alternatively, the composite reactive articles can comprise porous fibrous membranes having enmeshed therein the aforementioned porous supports which can be in particulate or fibrous forms. The method for quantifying cyanide ions in solution comprising the steps of contacting and passing a solution containing cyanide ions through a reactive support comprising a porous, high surface area, inert substrate on which is immobilized finely divided elemental gold at a controlled rate to provide for a time to provide sufficient contact time for the gold and cyanide ions to react and provide a soluble gold cyanide complex, recovering the effluent comprising said gold cyanide complex, and determining the quantity of cyanide present in the gold cyanide complex.

    摘要翻译： 复合反应性物质可用于定量溶液中的氰化物离子。 复合反应性物品可以是多孔反应性载体，其包括在其上固定有细碎金的惰性底物。 多孔反应性载体可以是颗粒状，多孔纤维膜或溶液 - 流延膜。 或者，复合反应性制品可以包括多孔纤维膜，其中包含可以是颗粒或纤维形式的上述多孔载体。 用于定量溶液中的氰化物离子的方法包括以下步骤：使含有氰离子的溶液通过反应性载体接触并通过包含多孔，高表面积的惰性基质的步骤，在其上以受控的速率固定细分的元素金以提供 时间为金和氰离子提供足够的接触时间进行反应并提供可溶性氰化金络合物，回收包含所述氰化金络合物的流出物，并测定氰化金络合物中存在的氰化物的量。