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5169522 |
Column slurry packing compressor
A liquid chromatography column that can be rapidly packed without a reservoir column is disclosed. The column includes a double sealed compressor piston with a mixture delivery bore extending...
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5167810 |
End cell for chromatography column
An end cell for a chromatography column has a moulded plastics structure and an integral screen formed of a woven mesh of fibres of the same plastic material as used for the end cell. A peripheral...
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5167809 |
Chromatography system
A chromatography system comprises a chromatography column 1 consisting of a column tube 7 having end flanges 19 and 27 at its lower and upper ends, supporting an upper end cap 3 carrying a piston...
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5158676 |
Chromatography apparatus
Chromatography systems with devices for compressing the column packing and/or for pulsation damping have incorporate an additional device in which a preselected minimum pressure, which is...
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5154738 |
Chiral separation media
The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas...
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5151110 |
Molecular sieve sensors for selective detection at the nanogram level
The invention relates to a selective chemical sensor for selective detection of chemical entities even at the nanogram level. The invention further relates to methods of using the sensor. The...
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5147538 |
Field-portable apparatus and method for analytical supercritical fluid extraction of sorbent materials
A field-portable supercritical fluid extraction apparatus uses an SFE solvent delivery means, SFE solvent cooling means, and reciprocating high pressure liquid chromatography pump having a cooled...
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5145579 |
Method of manufacturing a separation column
Glass capillaries having an internal diameter of a few micrometers are internally provided with a relatively thick polymer film by in-situ polymerisation of suitable monomers and/or oligomers in a...
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5139680 |
Method for continuous multicomponent separation using anisotropic separation bed
Continuous multicomponent separation is conducted in a two-dimensional anisotropic separation bed which has different separating properties in at least two directions, Y and X. The carrier fluid...
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5137628 |
Sealing arrangement for a chromatography column
The present invention relates to chromatography column for process scale high performance purification, which has high stability and structural integrity regardless of the internal diameter or...
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5132012 |
Liquid chromatograph
A liquid chromatograph comprises an analyzing chip in which a capillary is formed in a substrate and a detector section is disposed downstream of the capillary. The capillary is covered so that an...
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5116495 |
Capillary chromatography device
The invention describes a new fabrication procedure of a capillary chromatography device with at least one sensor unit. The device contains at least one capillary column which is formed between a...
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5104530 |
Chromatography column with carbonaceous adsorbents from pyrolyzed polysulfonated polymers
Carbonaceous adsorbent particles having multimodal pore size, including micropores and macropores, with improved adsorptive and separative properties, are prepared by partial pyrolysis of...
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5098784 |
Supports for gas chromatography comprising aggregates of finely divided carbon particles and process for preparing the same
Supports for gas chromatography comprising aggregates of finely divided carbon particles, said aggregates having a bulk specific gravity of 0.2 to 0.5 and a specific surface area of not more than...
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5098451 |
Vapor concentrator
A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from...
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5087275 |
Electrochemical sensor having microcavities
A method for making a microcavity in an enamel layer is disclosed. For this purpose, a layer of a carbon-based material with the dimensions of the microcavity to be obtained is provided. This layer...
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5087359 |
Quaternized PEI silica solid supports for chromatography
Quaternized non-crosslinked polyethyleneimine silica based solid supports are useful strong anion exchangers for column chromatography separation and purification of proteins and have high binding...
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5082559 |
Glass chromatography capillary with relatively thick coating
Glass capillaries having an internal diameter of a few micrometers are internally provided with a relatively thick polymer film by in-situ polymerization of suitable monomers and/or oligomers in a...
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5057216 |
Capillary flow cell
A capillary flow cell in which a capillary (9) partially extends along the optical path of the cell and has its two end portions (12,13) bent to achieve an essentially Z-shaped configuration. A...
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5049509 |
Chromatographic analyzer
Methods and apparatus for analyzing a hydrocarbon sample are provided. The apparatus employs a highly polar column to separate the aromatics from non-aromatic components. The non-aromatic effluent...
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5043062 |
High performance affinity chromatography column comprising non-porous, nondisperse polymeric packing material
A high performance affinity chromatography separation device comprising: A) a chromatographic column containing: B) a packing material; wherein the packing material is a plurality of...
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5037544 |
Keyed column chromatography apparatus
Keyed column chromatography apparatus comprises a polymer body having a channel extending therethrough, means for coupling the column to insertion apparatus having complimentary coupling means, and...
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5030352 |
Coated media for chromatography
Disclosed are pellicular materials useful in contact with proteins and as chromatography media. Rigid, inert, hydrophobic, polymeric materials are exposed to a solution comprising a solute defining...
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4999162 |
High temperature flame jet for gas chromatography
A flame detector comprising a ceramic flame jet for use in a high temperature gas chromatography system is disclosed. The interior volume of the flame jet is fabricated of a highly inert ceramic...
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H000896 |
Separating column for gas chromatography
A method of fabricating an elution chromatography separating column from an elongated capillary tube, such column having a layer comprising a plurality of disunited particles of porous solid...
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4992083 |
Apparatus for intermediate enrichment of trace substances from a gas stream in a cold trap, and chromatography arrangement provided therewith
For intermediate enrichment of trace substances from a gas stream, a cold ap is used which carries a flow and optionally contains an adsorbent material and which is surrounded by a gas-tight...
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4966785 |
Method for making a non-extractable stationary phase of polymer within a capillary column
A method for coating interior capillary column surfaces, or packing material of a packed column, used for gas chromatography, with a stationary polymer phase that is cross-linked by exposing it to...
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4960444 |
Method for the determination of organic acids in an aqueous sample by; gas chromatography
A gas chromatography method for the determination of organic acids using an otherwise conventional gas chromatography system, the advance being injecting a predetermined volume of an aqueous sample...
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4927532 |
Device for the compensation of the baseline drift of a chromatographic separating column
The baseline drift occurring during a temperature or flow rate program in a chromatographic separating column is compensated for by signals from a function generator. The function generator...
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4917709 |
Permeation pH control system
A simplified, single component resin bed is coupled with a permeation tube and bottle. The permeation bottle contains an ionic species and a dissolved gas. The apparatus makes unnecessary a...
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4771628 |
Chamber for chromatographic analyses
This invention concerns a chamber for chromatographic analyses, in which capillary columns, in particular columns of fused silica, are thermally conditioned. The chamber comprises a thermally...
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4737292 |
HPLC column and a column packing method
This invention relates to a column for use in preparative HPLC so structured as to insure a reproducible packing bed uniformity regardless of the particle size of the medium used.
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4726822 |
Fast response thermochromatographic capillary columns
A thermochromatographic column has a fused silica capillary with a high temperature chemically inert polymer coating thereon supporting a thin heater film formed by the deposition of either a high...
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4699768 |
Apparatus for exchanging substances between fluids
Apparatus and method are provided for the exchange of substances between substance carrier and recovery fluids in predetermined carrier/recovery fluid volumetric ratios, and operate through the...
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4654052 |
Variable molecular separator
A method and device for separating trace amounts of relatively large molecules in the gas or vapor state from a low molecular weight gas or vapor is disclosed. The method and device are...
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4650964 |
Electrically heated transfer line for capillary tubing
A heated transfer line for heating a small glass capillary tube is disclosed. The transfer line is small and removable yet highly efficient, capable of uniformly heating a glass capillary tube over...
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4650499 |
Gas chromatographic apparatus and method
A gas chromatographic method and apparatus are provided wherein a reservoir system including at least one reservoir is utilized to collect each component as it elutes from a chromatographic...
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4599169 |
Heating and cooling apparatus for chromatography column
A baffle divides a housing into first and second compartments. The first compartment includes a chromatography oven having a fan for circulating heated air over the columns while the oven is closed...
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4580036 |
Gas chromatography oven
In a gas chromatography oven, the heated enclosure is designed to be of a low thermal mass to permit more rapid programmed temperature changes, and to provide good oven cooling for work on the...
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4563276 |
Chromatographic apparatus and process
Through the intentional introduction of dopants into a glass structure by utilizing a procedure such as is involved in the modified chemical vapor deposition technique and through subsequent...
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4554436 |
Electric heater for a rotating sample vessel container in a sampling device for gas chromatography
A sample vessel container in a sampling device for use in gas chromatography includes a rotatable metal block having a circular array of axial bores for accommodating a plurality of sample vessels....
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4549584 |
Process and device for filling chromatography columns
A process and apparatus for filling and packing a chromatographic column by the wet route in which a compression chamber is attached to one end of the column having an internal bore equal to the...
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4512897 |
Molecular separation column and use thereof
A molecular separation column for effecting the differential distribution, between two phases, of the components of a sample flowing therethrough. The column contains a substantially homogenous...
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4509964 |
Fused silica capillary column
A gas chromatographic column comprising synthetic fused silica tubing irradiated in its raw state with gamma radiation of pre-selected dosage and dosage rate. The column further comprises a...
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4508624 |
Ceramic body for chromatography and process for preparation thereof
Disclosed is a ceramic body for chromatography, which consists of a calcined molded body of alumina particles composed mainly of α-alumina, preferably containing a minor amount of γ-alumina, and...
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4496433 |
Apparatus and method for determining the amount of a sample gas component
A gas chromatograph for measuring the amounts of selected sample gas components such as oxygen and carbon monoxide. The system comprises a high-temperature (600° C.) zirconia cell detector...
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4483773 |
Narrow bore micro-particulate column packing process and product
A process for packing narrow bore chromatographic columns and the resulting product are provided. A flexible column, preferably of fused silica, of inner diameter less than 500 μm is selected. A...
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4443231 |
Continuous chromatographic separations in a magnetically stabilized fluidized bed
A multicomponent feed mixture may be separated into its components continuously by injecting said feed mixture and a carrier fluid into a magnetically stabilized fluidized bed containing adsorbent...
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4376641 |
Coated capillary chromatographic column
In the production of a wall coated open tubular capillary chromatographic column, improved deactivation of the inner surface of a glass or fused silica capillary tube prior to coating with...
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4321065 |
Lithium aluminates for gas chromatograph columns
Particles of crystalline LiX2A1(OH) 3 nH 2 O, where X is a monovalent, divalent, or trivalent anion, especially chlorine, are useful in gas chromatography in separating hydrocarbons...
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