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公开(公告)号：US4911837A
公开(公告)日：1990-03-27
申请号：US339473
申请日：1989-04-17
CPC分类号： B01D15/22 , G01N30/603 , G01N30/6017 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than two millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall. The frit is formed of gold-plated nickel spheres sintered together at a temperature lower than the gold-nickel eutectic temperature of 950 degrees Celsius but above the phase-immiscibility temperature of 720 degrees Celsius. The size and shape of the frit is selected to reduce tailing by causing the flow path from the column to be uniform.
摘要翻译： 为了减少拖尾，液相色谱柱出口处的玻璃料的直径基本上等于柱的出口端的内径，直径小于2毫米。 它被直接抵靠在具有肩部的圆柱形构件的圆柱形构件中，所述圆柱形构件具有至少具有中心孔的至少大小的玻璃料和圆柱形壁的直径的尺寸，所述玻璃料和圆柱形壁被紧固以抵抗在柱的轴线方向上的力 其入口到其出口。 垫圈将柱形保持器密封在柱壁上。 玻璃料由在950℃以下的金 - 镍共晶温度下高于720℃的相互不混溶温度的温度下烧结在一起的镀金镍球形成。 选择玻璃料的尺寸和形状以通过使来自塔的流动路径均匀来减少拖尾。
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公开(公告)号：US5080785A
公开(公告)日：1992-01-14
申请号：US523475
申请日：1990-05-15
申请人： Robert W. Allington , John N. Jones
发明人： Robert W. Allington , John N. Jones
IPC分类号： G01N30/34
CPC分类号： G01N30/34
摘要： To prevent the solvents forming a gradient from mixing at the wrong place and to provide for accurate composition at start of the gradient in spite of solvent pressure variations, a microliquid or supercritical fluid chromatograph includes a combined mixer and pressure detector in which equal pressures of the two solvents in the gradient are detected by displacement of a ferromagnetic poppet in the mixing chamber. The poppet serves as a stop for the final solvent until the pressures are substantially equal and then its movement is detected by a circuit related to a linear variable differential transformer. The signal energizes a circuit which drives one of the sensing coils to drive the poppet during the gradient to provide mixing.
摘要翻译： 为了防止形成梯度的溶剂在错误的地方混合，并且尽管有溶剂压力变化而在梯度开始时提供精确的组成，但微液体或超临界流体色谱仪包括组合的混合器和压力检测器，其中相同的压力 梯度中的两种溶剂通过在混合室中的铁磁提升阀的位移来检测。 提升阀作为最终溶剂的停止点，直到压力基本相等，然后通过与线性可变差动变压器相关的电路检测其运动。 该信号激励驱动其中一个感测线圈的电路，以在梯度期间驱动提升阀以提供混合。
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公开(公告)号：US4765890A
公开(公告)日：1988-08-23
申请号：US104437
申请日：1987-10-05
CPC分类号： B01D15/08 , G01N30/603 , G01N30/6017 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than two millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall. The frit is formed of gold-plated nickel spheres sintered together at a temperature lower than the gold-nickel eutectic temperature of 950 degrees Celsius but above the phase-immiscibility temperature of 720 degrees Celsius. The size and shape of the frit is selected to reduce tailing by causing the flow path from the column to be uniform.
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公开(公告)号：US5071562A
公开(公告)日：1991-12-10
申请号：US621648
申请日：1990-12-03
申请人： Robert W. Allington , John N. Jones
发明人： Robert W. Allington , John N. Jones
IPC分类号： G01N30/34
CPC分类号： G01N30/34
摘要： To prevent the solvents forming a gradient from mixing at the wrong place and to provide for accurate composition at start of the gradient in spite of solvent pressure variations, a microliquid or supercritical fluid chromatograph includes a combined mixer and pressure detector in which equal pressures of the two solvents in the gradient are detected by displacement of a ferromagnetic poppet in the mixing chamber. The poppet serves as a stop for the final solvent until the pressures are substantially equal and then its movement is detected by a circuit related to a linear variable differential transformer. The signal energizes a circuit which drives one of the sensing coils to drive the poppet during the gradient to provide mixing.
摘要翻译： 为了防止形成梯度的溶剂在错误的地方混合，并且尽管有溶剂压力变化而在梯度开始时提供精确的组成，但微液体或超临界流体色谱仪包括组合的混合器和压力检测器，其中相同的压力 梯度中的两种溶剂通过在混合室中的铁磁提升阀的位移来检测。 提升阀作为最终溶剂的停止点，直到压力基本相等，然后通过与线性可变差动变压器相关的电路检测其运动。 该信号激励驱动其中一个感测线圈的电路，以在梯度期间驱动提升阀以提供混合。
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公开(公告)号：US4966696A
公开(公告)日：1990-10-30
申请号：US368112
申请日：1989-06-16
CPC分类号： B01D15/22 , G01N30/603 , G01N30/6017 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than two millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall. The frit is formed of gold-plated nickel spheres sintered together at temperature lower than the gold-nickel eutectic temperature of 950 degrees Celsius but above the phase-immiscibility temperature of 720 degrees Celsius. The size and shape of the frit is selected to reduce tailing by causing the flow path from the column to be uniform.
摘要翻译： 为了减少拖尾，液相色谱柱出口处的玻璃料的直径基本上等于柱的出口端的内径，直径小于2毫米。 它被直接抵靠在具有肩部的圆柱形构件的圆柱形构件中，所述圆柱形构件具有至少具有中心孔的至少大小的玻璃料和圆柱形壁的直径的尺寸，所述玻璃料和圆柱形壁被紧固以抵抗在柱的轴线方向上的力 其入口到其出口。 垫圈将柱形保持器密封在柱壁上。 玻璃料由低于950℃的金 - 镍共晶温度但高于720℃的相不混溶温度在一起烧结在一起的镀金镍球形成。 选择玻璃料的尺寸和形状以通过使来自塔的流动路径均匀来减少拖尾。
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公开(公告)号：US4882063A
公开(公告)日：1989-11-21
申请号：US73079
申请日：1987-07-13
申请人： Robert W. Allington , John N. Jones
发明人： Robert W. Allington , John N. Jones
IPC分类号： G01N30/34
CPC分类号： G01N30/34
摘要： To prevent the solvents forming a gradient from mixing at the wrong place and to provide for accurate composition at start of the gradient in spite of solvent pressure variations, a microliquid or supercritical fluid chromatograph includes a combined mixer and pressure detector in which equal pressures of the two solvents in the gradient are detected by displacement of a ferromagnetic poppet in the mixing chamber. The poppet serves as a stop for the final solvent until the pressures are substantially equal and then its movement is detected by a circuit related to a linear variable differential transformer. The signal energizes a circuit which drives one of the sensing coils to drive the poppet during the gradient to provide mixing.
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公开(公告)号：US4863592A
公开(公告)日：1989-09-05
申请号：US117371
申请日：1987-10-28
CPC分类号： G01N30/603 , B01D15/08 , G01N30/6017 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than two millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall. The frit is formed of gold-plated nickel spheres sintered together at a temperature lower than the gold-nickel eutectic temperature of 950 degrees Celsius but above the phase-immiscibility temperature of 720 degrees Celsius. The size and shape of the frit is selected to reduce tailing by causing the flow path from the column to be uniform.
摘要翻译： 为了减少拖尾，液相色谱柱出口处的玻璃料的直径基本上等于柱的出口端的内径，直径小于2毫米。 它被直接抵靠在具有肩部的圆柱形构件的圆柱形构件中，所述圆柱形构件具有至少具有中心孔的至少大小的玻璃料和圆柱形壁的直径的尺寸，所述玻璃料和圆柱形壁被紧固以抵抗在柱的轴线方向上的力 其入口到其出口。 垫圈将柱形保持器密封在柱壁上。 玻璃料由在950℃以下的金 - 镍共晶温度下高于720℃的相互不混溶温度的温度下烧结在一起的镀金镍球形成。 选择玻璃料的尺寸和形状以通过使来自塔的流动路径均匀来减少拖尾。
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公开(公告)号：US4759843A
公开(公告)日：1988-07-26
申请号：US104422
申请日：1987-10-05
CPC分类号： B01D15/22 , G01N30/603 , G01N30/6017 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than two millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall. The frit is formed of gold-plated nickel spheres sintered together at a temperature lower than the gold-nickel eutectic temperature of 950 degrees Celsius but above the phase-immiscibility temperature of 720 degrees Celsius. The size and shape of the frit is selected to reduce tailing by causing the flow path from the column to be uniform.
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公开(公告)号：US4575424A
公开(公告)日：1986-03-11
申请号：US585347
申请日：1984-03-01
申请人： Robert W. Allington , John N. Jones
发明人： Robert W. Allington , John N. Jones
CPC分类号： G01N30/74 , G01N21/05 , G01N2021/0346 , G01N2030/746
摘要： To accommodate microscale chromatographs, a flow cell has an inlet port, inlet path, light path, outlet path and outlet port, with the inlet and outlet paths being formed continuously around wires of the proper diameters during molding. The wires pass through the mold and against a metal light-path insert during molding and are removed from the plastic after molding to form portions of the inlet and outlet paths. The insert for the light path is formed in two parts, each having a groove in the form of a half cylinder along its center for the light path and having channels on each side. The paths are machined prior to lapping, and after lapping, the light path is coated with a bright metal such as rhodium and then it is burnished for a mirror image with a roughness of less than sixteen RMS micro inches.
摘要翻译： 为了适应微量色谱，流通池具有入口，入口路径，光路，出口路径和出口，入口和出口路径在成型期间连续地围绕适当直径的线形成。 导线在模制期间通过模具并抵靠金属光路插入件，并且在模制之后从塑料上移除以形成入口和出口路径的部分。 用于光路的插入件形成为两个部分，每个部分具有半圆形形式的凹槽，沿着其中心的光路并且在每侧具有通道。 路径在研磨之前被加工，并且在研磨之后，光路涂覆有诸如铑的明亮金属，然后被抛光用于具有小于十六RMS RMS英寸的粗糙度的镜像。
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公开(公告)号：US4545904A
公开(公告)日：1985-10-08
申请号：US585298
申请日：1984-03-01
CPC分类号： B01D15/08 , B01D15/22 , G01N30/603 , G01N30/6026 , G01N30/6052 , G01N30/74
摘要： To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than 2 millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall.
摘要翻译： 为了减少拖尾，液相色谱柱出口处的玻璃料的直径基本上等于柱的出口端的内径，直径小于2毫米。 它被直接抵靠在具有肩部的圆柱形构件的圆柱形构件中，所述圆柱形构件具有至少具有中心孔的至少大小的玻璃料和圆柱形壁的直径的尺寸，所述玻璃料和圆柱形壁被紧固以抵抗在柱的轴线方向上的力 其入口到其出口。 垫圈将柱形保持器密封在柱壁上。
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