公开(公告)号：US20240068998A1

公开(公告)日：2024-02-29

申请号：US18239049

申请日：2023-08-28

Applicant: OHIO STATE INNOVATION FOUNDATION

Inventor： Jacob WILDOFSKY ,  Kenneth COPLEY ,  Boian ALEXANDROV

IPC: G01N30/86 ,  G01N30/66 ,  G01N33/00

CPC classification number: G01N30/8665 ,  G01N30/66 ,  G01N33/005 ,  G01N2030/025

Abstract: Provided herein are calibration valves that can be used to direct the flow of gases within a gas chromatograph (GC) equipped with a thermal conductivity detector (TCD). The calibration valves can provide both gas calibration and flow control to a GC TCD in a single compact design. For example, the calibration valves can serially deliver a series of small, predetermined volumes of a gas of interest to a GC TCD to facilitate calibration of the GC TCD for detection and/or quantification of the gas of interest in a sample. In certain aspects, the calibration valve can be designed to calibrate the GC TCD with small volumes of a gas of interest (e.g., hydrogen) ranging from 5 mm3 to 100 mm3 with high precision. Such a calibration valve can be used to calibrate a GC TCD to detect and/or quantify the gas of interest in a sample.

公开(公告)号：US11561208B2

公开(公告)日：2023-01-24

申请号：US16713245

申请日：2019-12-13

Applicant: Siemens Aktiengesellschaft

Inventor： Stefan Klehr ,  Günter Marcaux

IPC: G01N30/66 ,  G01N25/18 ,  G01N30/02 ,  G01N30/30 ,  G01F1/684 ,  G01F1/69 ,  G01F1/692 ,  G01N25/20

Abstract: A thermoresistive gas sensor includes two identical, flat meshes that consist of a semiconductor material with a predetermined type of conductivity and that are interconnected in sections of an electric measuring bridge that are diametrically opposite one another, wherein each mesh of the two identical, flat meshes has mesh webs that extend parallel, adjacent to one another and that are connected electrically in parallel at the ends, where the mesh webs of the two meshes extend alternately adjacent to one another in a shared mesh plane horizontally across a window opening in a carrier plate.

公开(公告)号：US11480552B2

公开(公告)日：2022-10-25

申请号：US16343261

申请日：2018-01-03

Applicant: LG Chem, Ltd.

Inventor： Min-Jeong Lee ,  Jong-Mo Jung

IPC: G01N30/66 ,  G01N1/40 ,  G01N1/22 ,  H01M10/42 ,  H01M10/48 ,  G01N30/02 ,  B32B27/32 ,  H01M50/40 ,  H01M50/409 ,  H01M50/411 ,  H01M50/446 ,  H01M50/449

Abstract: The present invention provides a method for measuring moisture content in a separator of secondary battery by using a gas chromatograph equipped with a headspace sampler. The separator of secondary battery may be a safety reinforced separator (SRS) in which inorganic substance particles and a binder polymer are coated on a polyolefin substrate.

公开(公告)号：US11243180B2

公开(公告)日：2022-02-08

申请号：US16760599

申请日：2017-12-19

Applicant: SHIMADZU CORPORATION

Inventor： Yuji Nakama

IPC: G01N25/18 ,  G01N30/66

Abstract: Provided is a thermal conductivity detector including a detection channel through which a gas to be measured flows as a fluid, a heat conducting part that includes at least a filament provided at a position in the detection channel at which the filament is in direct contact with the fluid flowing through the detection channel, the filament being folded at least once in a direction substantially parallel to a flow direction of the fluid flowing through the detection channel, and that conducts heat via the fluid flowing through the detection channel, and a detection circuit that detects an electric signal in accordance with a change in current or voltage of the filament. The filament is folded by being holed on a folding pin provided substantially perpendicular to the flow direction in the detection channel, and the folding pin has a position shift prevention structure for preventing a fold of the filament hooked on the folding pin from shifting in a longitudinal direction of the folding pin.

公开(公告)号：US20200209201A1

公开(公告)日：2020-07-02

申请号：US16646248

申请日：2018-09-11

Applicant: NORTH CAROLINA STATE UNIVERSITY

Inventor： Milad ABOLHASANI ,  Robert W. EPPS ,  Kobi C. FELTON

IPC: G01N30/60 ,  G01N30/30 ,  G01N30/66 ,  G01N30/24

Abstract: Disclosed herein are devices comprising: a sample conduit providing a path for fluid flow extending from a sample inlet to a sample outlet; a thermal housing enclosing the sample conduit, wherein the thermal housing comprises a plurality of measurement regions; and a motorized stage translatable along the thermal housing from a first location to a second location so as to align a detector with one or more of the plurality of measurement regions. Also disclosed are methods of use of the devices described herein.

公开(公告)号：US10408802B2

公开(公告)日：2019-09-10

申请号：US15529944

申请日：2015-11-27

Applicant: Cambridge Enterprise Limited

Inventor： Vasant Ramachandran Kumar ,  Sohab Sarfraz ,  Florin Udrea

IPC: G01N30/66 ,  G01N25/18 ,  G01N27/18 ,  G01N30/60 ,  G01N33/497

Abstract: A thermal conductivity sensing device (1) is disclosed, along with a method for operation of the thermal conductivity sensing device and use of the thermal conductivity sensing device in a system for gas chromatography and a method of carrying out gas chromatography. The thermal conductivity sensing device is for use in sensing one or more gaseous components in a flowing gaseous environment. The device has a first sensor (4B) and a second sensor (4A) for exposure to the same flowing gaseous environment (G). The first sensor has an associated flow altering means (20) to affect gas flow at least at part of the surface of the first sensor, to be different to gas flow at the surface of the second sensor. Each sensor provides an output relating to heat transfer between a surface of the sensor and the gaseous environment. The device is operable to compare outputs of the first and second sensors. The sensor is able to reduce the effects of bulk convection of the flowing gas on thermal conductivity measurements.

公开(公告)号：US20190128858A1

公开(公告)日：2019-05-02

申请号：US16161437

申请日：2018-10-16

Applicant: Shimadzu Corporation

Inventor： Shinji Uchiyama

IPC: G01N30/66 ,  G01N27/62

Abstract: To increase the difference between the thermal conductivity of the carrier gas and the thermal conductivity of each component of the sample gas. The analysis method is an analysis method that performs analysis using a gas chromatograph including a thermal conductivity detector. The analysis method includes introducing a carrier gas and a sample gas into a separation column, introducing the sample gas separated in the separation column into a gas introduction chamber including an element having an electrical characteristic changed by temperature, detecting a change in the electrical characteristic of the element due to the sample gas being introduced, and switching the carrier gas from a first carrier gas to a second carrier gas that is a different type from the first carrier gas, while a component of the sample gas is passing through the separation column

公开(公告)号：US10274447B2

公开(公告)日：2019-04-30

申请号：US15665712

申请日：2017-08-01

Applicant: SHIMADZU CORPORATION

Inventor： Yuji Nakama

IPC: G01N27/18 ,  G01N25/18 ,  G01N30/66 ,  G01N30/02 ,  G01N30/12

Abstract: Detection sensitivity of a single-filament thermal conductivity detector is to be increased. A thermal conductivity detector is a single-filament thermal conductivity detector, and includes a measurement cell, a phase switching mechanism, and a measurement section. The measurement section starts measurement of thermal conductivity of a sample gas after a lapse of a sample gas measurement start time that is set in advance, after a reference phase is switched to a sample phase by the phase switching mechanism, and starts measurement of thermal conductivity of a reference gas after a lapse of a reference gas measurement start time that is set in advance as a length of time different from the sample gas measurement start time, after the sample phase is switched to the reference phase by the phase switching mechanism.

公开(公告)号：US10024829B2

公开(公告)日：2018-07-17

申请号：US14499383

申请日：2014-09-29

Applicant: PERKINELMER HEALTH SCIENCES, INC.

Inventor： Andrew Tipler ,  John Irion

IPC: G01N33/66 ,  G01N30/66 ,  G01N30/02 ,  G01N30/88 ,  G01N30/60 ,  B01L3/00 ,  B01D63/00 ,  G01N25/00 ,  B01D35/00 ,  B01D15/18 ,  B01D53/04 ,  B01D15/08 ,  B01D15/26 ,  G01N30/62

Abstract: Certain embodiments described herein are directed to devices that can be used to control fluid flow through one or more detectors. In some configurations, the device can be configured as a manifold that can receive a positive pressure to decouple the flow of fluid through a chromatography column from fluid flow through a detector. In certain configurations, sample flow can be accelerated into a detector cell comprising one or more filaments.

公开(公告)号：US09903770B2

公开(公告)日：2018-02-27

申请号：US14669981

申请日：2015-03-26

Applicant: Siemens Aktiengesellschaft

Inventor： Glen Eugene Schmidt ,  Udo Gellert ,  Aosheng Wang

IPC: G01K17/00 ,  G01N25/18 ,  G01N30/66 ,  G01N30/86

CPC classification number: G01K17/00 ,  G01N25/18 ,  G01N30/66 ,  G01N30/8641

Abstract: A thermal conductivity detector includes a switch controllable to short-circuit the input of an amplifier to improve the thermal conductivity detector for use in gas chromatography without the need of an additional reference cell, wherein a digital signal processor calculates a transfer function of an analog signal processor from a digitized difference signal received in response to short-circuiting the input of the amplifier at a given time when solely a reference carrier fluid passes through a measuring cell, and the digital signal processor recovers a detector signal by deconvoluting the digitized difference signal with a transfer function.