专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US4775795A Method and apparatus for detecting very small concentrations of gases in a gas mixture 失效
标题翻译：用于检测气体混合物中非常小浓度的气体的方法和装置
公开(公告)号：US4775795A
公开(公告)日：1988-10-04
申请号：US13983
申请日：1987-02-12
申请人： Karl-Ernst Biehl , Egon Tyssen , Conrad G. von Roedern
发明人： Karl-Ernst Biehl , Egon Tyssen , Conrad G. von Roedern
IPC分类号： G01N27/64 , G01N27/66 , G01P5/18 , G01T1/10
CPC分类号： G01N27/622
摘要： A method for detecting very small concentrations of gases in gas mixtures passed as a gas stream through a measuring cell having a chamber through which the gas stream flows through, a drift zone provided between an inlet and an outlet of the chamber, a gas stream ionizing radiation source located at the inlet of the drift zone, a collector electrode located at the outlet of the drift zone, a grid consisting of two groups of parallel wires located in the drift zone current adjacent grid wires are supplied with different electrical voltages and whereat an AC voltage of adjustable frequency is fed to the two groups of grid wires, and a measuring apparatus for detecting the collector current, including the steps of inducing the movement of the ions through the drift zone by means of a ventilator which generates a controlled gas flow to the collector electrode, periodically changing the frequency of the AC voltage applied to the groups of grid wires either continuously or stepwise, simultaneously measuring the collector current dependent on the grid frequency, digitizing and storing the measured collector current in a memory as a function of the frequency, storing in a further memory a table of collector current/frequency curves for different gases, comparing the measured curves with the stored curves and, if a measured curve is identical with one of the stored curves, producing an indication signal characterizing the gas corresponding to the particular stored curve. An apparatus for measuring a gas concentration is provided using this method.
摘要翻译：一种用于检测气体混合物中气体混合物中非常小浓度的气体的方法，该气体混合物通过具有气体流过的室的测量池通过，设置在室的入口和出口之间的漂移区，气流离子化辐射源位于漂移区的入口处，位于漂移区出口处的集电极，由两组平行的电线组成的电网，位于漂移区中，电流相邻的电网电线被提供有不同的电压，其中可调频率的交流电压被馈送到两组栅格线，以及用于检测集电极电流的测量装置，包括通过产生受控气流的呼吸机使离子通过漂移区移动的步骤到集电极电极，连续或逐步地周期性地改变施加到栅格线组的AC电压的频率根据电网频率测量集电极电流，将测量的集电极电流数字化并存储在存储器中作为频率的函数，在另一存储器中存储不同气体的集电极电流/频率曲线表，将测量的曲线与存储的曲线，如果测量曲线与所存储的曲线之一相同，则产生表征与特定存储曲线对应的气体的指示信号。使用该方法提供测量气体浓度的装置。

32. 发明授权

US4740695A Ionization detectors for gas chromatography 失效
标题翻译：气相色谱电离检测器
公开(公告)号：US4740695A
公开(公告)日：1988-04-26
申请号：US787563
申请日：1985-10-15
申请人： Colin F. Simpson
发明人： Colin F. Simpson
IPC分类号： G01N27/64 , G01N27/66 , G01N30/64 , B01D59/44
CPC分类号： G01N30/64 , G01N27/66
摘要： There are disclosed gas chromatographic ionization detectors of the argon and electron capture types. The free electrons required for the functioning of the detectors is achieved by irradiating a solid photoemissive element with ultraviolet radiation.
摘要翻译：公开了氩气和电子捕获类型的气相色谱电离检测器。通过用紫外线辐射照射固体光发射元件来实现检测器功能所需的自由电子。

33. 发明授权

US4680472A Process and apparatus for the stabilization of measuring results furnished by an "electron capture" detector with identification of anomalies affecting the detector 失效
标题翻译：用于稳定由“电子捕获”检测器提供的测量结果的方法和装置，其识别影响检测器的异常
公开(公告)号：US4680472A
公开(公告)日：1987-07-14
申请号：US818635
申请日：1986-01-14
申请人： Claude Mendes
发明人： Claude Mendes
IPC分类号： G01N27/66 , G01N30/70
CPC分类号： G01N30/70 , G01N27/66
摘要： When using an electron capture detector for the molecular identification of electrophilic compounds, the sensitivity of the detector is made reproducible by controlling the voltage or frequency of the pulses applied to it to maintain a reference current whose set value is produced automatically by the device after determination of the characteristics of the state of the detector, namely a so-called saturation current CM and a so-called spontaneous current CS, according to a law of proportionality between these two currents.In addition, knowledge of these state characteristics gives information on the physical and physicochemical anomalies of the analysis device having an effect on the sensitivity of the detector, and consequently enables them to be remedied.
摘要翻译：当使用电子捕获检测器进行亲电子化合物的分子鉴定时，通过控制施加到其上的脉冲的电压或频率来维持检测器的灵敏度，使得检测器的灵敏度可以重现，以保持参考电流，其设定值在确定后由器件自动产生的检测器状态的特性，即所谓的饱和电流CM和所谓的自发电流CS，根据这两个电流之间的比例定律。此外，这些状态特征的知识提供了对分析装置的物理和物理化学异常的信息，其对检测器的灵敏度具有影响，并且因此使得它们得到补救。

34. 发明授权

US4398152A Photoionization detector 失效
标题翻译：光电检测器
公开(公告)号：US4398152A
公开(公告)日：1983-08-09
申请号：US353989
申请日：1982-03-02
申请人： Richard C. Leveson
发明人： Richard C. Leveson
IPC分类号： G01N27/66 , G01N30/64 , G01N27/00
CPC分类号： G01N30/64 , G01N27/66 , G01N2030/642
摘要： A gas discharge tube is provided for use in a detector of the type capable of identifying ionizable species in a carrier gas. The tube contains an inert gas at reduced pressure and the gas is excited by an external circuit including a coil about the tube. The circuit generates a radio frequency which excites the gas and emits ultraviolet radiation. This radiation passes through a transversely located window at the end of the tube for ionizing the species in a chamber. Electrodes are also described for use in association with the chamber to sense ionization. These electrodes form part of a sensing circuit.
摘要翻译：提供了一种气体放电管，用于能够识别载气中的可离子化物质的类型的检测器。该管在减压下含有惰性气体，并且气体由包括围绕管的线圈的外部电路激发。该电路产生激发气体并发射紫外线的射频。该辐射通过管的端部处的横向定位的窗口，用于电离室中的物质。电极也被描述为与室联合以用于感测电离。这些电极构成感测电路的一部分。

35. 发明授权

US4374090A Chemical bias agent detection 失效
标题翻译：化学偏置剂检测
公开(公告)号：US4374090A
公开(公告)日：1983-02-15
申请号：US280438
申请日：1981-07-06
申请人： B. Thompson McClure
发明人： B. Thompson McClure
IPC分类号： G01N27/66 , G01N27/70 , G01Q90/00
CPC分类号： G01N27/66 , G01N27/70
摘要： The present invention is directed to an ionization cell for detecting the presence of very minute concentrations of certain chemical agents. The effective sensitivity of conventional chemical agent detectors is restricted in the presence of certain interferants such as jet fuel, gasoline, smoke, turpentine and the like. Herein a "chemical bias," that is a background concentration of a simulant is provided at the inlet of an ionization detector, which chemical bias is effective by charge exchange to prevent the interferants from dominating the signal.
摘要翻译：本发明涉及用于检测非常微小浓度的某些化学试剂的存在的电离池。常规化学试剂检测器的有效灵敏度在某些干扰剂如喷气燃料，汽油，烟雾，松节油等的存在下受到限制。这里，在电离检测器的入口处提供作为模拟物的背景浓度的“化学偏压”，该化学偏压通过电荷交换有效，以防止干扰物主导信号。

36. 发明授权

US4345154A Bias-compensated, ionization sensor for gaseous media and method for attaining proper bias for same 失效
标题翻译：用于气体介质的偏置补偿电离传感器和用于获得适当偏差的方法
公开(公告)号：US4345154A
公开(公告)日：1982-08-17
申请号：US264873
申请日：1981-05-18
申请人： Augustus S. Bainbridge
发明人： Augustus S. Bainbridge
IPC分类号： G01N27/62 , G01N27/66 , H01J39/28
CPC分类号： G01N27/62 , G01N27/66
摘要： An ionization detector unit innovatively adapted to provide mobility to thenit and to render it especially suitable for convenient "field-use" in point-source sampling and monitoring of the compositional characteristics of a gaseous medium such as, for example, the ambient atmosphere, and in emitting a discernible electrical signal which in response to a perceptible change in the compositional characteristics in the medium being monitored by the detector will be altered sufficiently to activate, or trigger, a suitable alarm or warning mechanism.The detector unit includes an ionization sensor cell for emitting an output signal and is powered by a suitable electrical source such as, for example, a miniature power source, and means for delivering or feeding to the sensor cell a representative stream or flow of the gaseous medium to be ionization monitored, and features a method and means for effectively compensating for variations and/or fluctuations in the electrical output signal emitted by the sensor cell as a consequent result of variations and/or fluctuations occurring in the rate of flow of the medium being delivered to and monitored thereby. The featured means is in the form of a low-voltage, battery-operated, bias device having a selectively predetermined, optimum, electrical resistance and a diode controlled voltage output operationally interconnected between one terminal or electrode of the sensor cell and an electrical ground.An innovative process and apparatus also are disclosed for determining the most effective bias voltage and preselected resistance to be provided by the biasing means.
摘要翻译：电离检测器单元创新地适于提供对单元的移动性，并使其特别适合于在点源采样和监测气态介质（例如环境大气）的组成特征方面的方便的“现场使用” 并且在发出可识别的电信号时，响应于由检测器监测的介质中的组成特征的可察觉的变化将被充分改变以激活或触发合适的报警或警告机构。检测器单元包括用于发射输出信号并由合适的电源（例如微型电源）供电的电离传感器单元，以及用于向传感器单元传送或馈送代表性气流或气体流的装置介质被电离监测，并且具有用于有效地补偿由传感器单元发射的电输出信号的变化和/或波动的方法和装置，作为在介质的流动速率中发生的变化和/或波动的结果被交付并由其监控。特征装置是具有选择性地预定的最佳电阻的低电压，电池供电的偏置装置的形式，以及在传感器单元的一个端子或电极与电接地之间可操作地互连的二极管受控电压输出。公开了一种创新的工艺和装置，用于确定由偏置装置提供的最有效的偏置电压和预选电阻。

37. 发明授权

US4273742A Drain apparatus for the reaction vessel in an atomic absorption instrument 失效
标题翻译：用于原子吸收仪器中的反应容器的排水装置
公开(公告)号：US4273742A
公开(公告)日：1981-06-16
申请号：US78977
申请日：1979-09-26
申请人： Bernhard Huber , Winfried Gonner
发明人： Bernhard Huber , Winfried Gonner
IPC分类号： G01N1/00 , G01N27/66 , G01N21/13 , G01N33/20
CPC分类号： G01N35/1097 , Y10T436/12 , Y10T436/25
摘要： Disclosed is a system for the measurement of the atomic absorption of gaseous samples including a reaction vessel and conduits for supplying liquid sample, carrier gas and a reagent to the vessel. A discharge conduit is coupled between the reaction vessel and the measuring cell of an atomic absorption spectrometer. The reaction vessel has a drain conduit and a relief valve in the drain conduit. Control means are provided for controlling the flow of liquid sample, carrier gas, reagent and gaseous sample through the corresponding conduits in accordance with the predetermined program for making consecutive measurements. A pressure sensor is provided for sensing pressure in the reaction vessel above a specified pressure indicative of incomplete draining of the vessel and below a specified pressure indicative of substantially complete draining of the vessel. The control means is coupled to the pressure sensor and is responsive to a pressure above the specified pressure to disable the system from a subsequent measurement.
摘要翻译：公开了一种用于测量气态样品的原子吸收的系统，包括用于向容器供应液体样品，载体气体和试剂的反应容器和导管。排放管道连接在反应容器和原子吸收光谱仪的测量池之间。反应容器在排水管道中具有排水管道和安全阀。提供控制装置，用于根据用于进行连续测量的预定程序，通过相应的导管控制液体样品，载体气体，试剂和气体样品的流动。提供压力传感器用于感测反应容器中的压力高于指示容器不完全排出的指定压力并低于指示容器基本上完全排水的指定压力。控制装置联接到压力传感器并且响应于高于指定压力的压力以使系统免于随后的测量。

38. 发明授权

US4273559A Elemental superselective gas chromatographic detection apparatus and method 失效
标题翻译：元素超选择性气相色谱检测装置及方法
公开(公告)号：US4273559A
公开(公告)日：1981-06-16
申请号：US972089
申请日：1978-12-21
申请人： Norvell J. Nelson
发明人： Norvell J. Nelson
IPC分类号： G01N30/68 , G01N21/72 , G01N27/66
CPC分类号： G01N30/68 , Y10T436/141111 , Y10T436/16 , Y10T436/163333
摘要： An alkali flame ionization detector having an independently biased activator intermediate the flame tip member and the ion collector has been found to yield ion current collector signals which will be selectively positive-going, negative-going or null in response to selected ionic species at an appropriately chosen value of bias potential. Elemental specificity has been found for those values of bias potential which produce a null signal in the presence of a sample.
摘要翻译：已经发现具有位于火焰尖端部件和离子收集器之间的独立偏置的激发器的碱性火焰离子化检测器产生离子集电器信号，其将响应于所选择的离子物质在适当地选择性地正向，负向或无效选择偏置电位值。已经发现了在样品存在下产生无效信号的偏置电位值的元素特异性。

39. 发明授权

US4230665A Apparatus for automatically generating and measuring gaseous measuring samples from a series of liquid samples 失效
标题翻译：用于从一系列液体样品自动生成和测量气体测量样品的装置
公开(公告)号：US4230665A
公开(公告)日：1980-10-28
申请号：US917829
申请日：1978-06-22
申请人： Bernhard W. Huber
发明人： Bernhard W. Huber
IPC分类号： G01N1/00 , G01N21/31 , G01N27/66 , G01N21/13 , G01N33/20
CPC分类号： G01N21/3103 , G01N1/22 , G01N1/24
摘要： Gaseous measuring samples like element hydrides are generated from liquid samples by reacting the same with reducing reagents in a reactor. In the reactor a countercurrent of inert gas strips the volatile reduction products from the reactor to convey the products to the measuring cell of an analytical measuring instrument. Various embodiments of the apparatus automatically controlling the supply of liquid sample and reagents to the reactor are disclosed such as mechanically or pneumatically controlled pumps. In each measuring cycle the reactor and respective components are washed to prevent contamination of succeeding samples; also, analytical determination of blank values as well as reference values can be included in each measuring cycle.
摘要翻译：通过与反应器中的还原剂反应，从液体样品中产生气态测量样品，如元素氢化物。在反应器中，逆流的惰性气体将挥发性还原产物从反应器中分离出来，将产物输送到分析测量仪器的测量池。所述设备的各种实施例自动控制向反应器供应液体样品和试剂，例如机械或气动控制的泵。在每个测量循环中，反应器和各个部件被洗涤以防止后续样品的污染; 也可以在每个测量周期中包括空白值的分析确定以及参考值。

40. 发明授权

US4117332A Circuit for linearizing the response of an electron capture detector 失效
标题翻译：用于线性化电子捕获探测器的响应的电路
公开(公告)号：US4117332A
公开(公告)日：1978-09-26
申请号：US661467
申请日：1976-02-26
申请人： John Robert Felton , Russell S. Gutow, Jr.
发明人： John Robert Felton , Russell S. Gutow, Jr.
IPC分类号： G01N27/64 , G01N27/66 , H03K7/06 , G01T1/18
CPC分类号： G01N27/66
摘要： A circuit improvement is disclosed for use in an electron capture detector of the type including an electron capture cell, means for applying polarization pulses to the cell to derive a cell current, means for varying the pulse rate to maintain the cell current constant, and means for converting the pulse frequency to an analog signal indicative of the concentration of an electron-capturing component. Pursuant to the improvement, the pulse rate is varied by means which include an electrometer-amplifier for receiving the cell current and providing an output indicative of cell current departure from a reference current; an integrator for receiving the electrometer-amplifier output, the integrator generating a saw-tooth wave form, the slope of which is proportional to the magnitude of the electrometer-amplifier output signal; means for comparing the integrator output signal with a fixed reference voltage and for generating a triggering pulse when the two are equal; and pulse generator means coupled to the comparator output for generating the polarization pulses in response to the triggering pulses.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式