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1.发明授权
公开(公告)号：US4120657A
公开(公告)日：1978-10-17
申请号：US788540
申请日：1977-04-18
申请人： Geza Nagy , Erno Pungor , Klara Toth , Jeno Havas , Zsofia Feher
发明人： Geza Nagy , Erno Pungor , Klara Toth , Jeno Havas , Zsofia Feher
CPC分类号： G01N31/166 , Y10T436/117497 , Y10T436/193333 , Y10T436/203332
摘要： The invention relates to a process of and equipment for a selective, quick and accurate analysis of liquid samples. According to the process of the invention a liquid or a gas sample absorbed by a liquid is allowed to flow at a constant volume rate and overtitrated with an amount of a reagent adequate to the measurement in a definite time. Then the flow of the reagent is decreased to zero in a definite time, meanwhile continuously following, in a known way, the changes occurring in the reaction mixture. The determination of the concentration is carried out by comparing the time elapsed between the appearances of the two chemical equivalence points with calibration curves prepared with standard solutions, said time having a well defined functional relationship with the concentration of the sample.The equipment according to the invention for carryinng out the process according to the invention contains an analysis channel in contact with a sample-storage tank or liquid storage tank or sampling device or liquid feeding device, said analysis channel comprising a gas-permeable membrane contacting a sample gas before the titration section if desired, said analysis channel being equipped with a pump, said analysis channel having a titration section comprising a small-volume flowthrough homogenizing space and a reagent feeder or reagent generator device coupled to a programming unit and joining said channel before the said homogenizing space. For the measurement and recording of changes occurring in time, said analysis channel has, in its section between said homogenizing space and the suitably shaped effluent section, a detector section containing one or more detectors and a recording and/or indicator unit; if desired, said analysis channel has an electronic signal processing unit coupled to the recording and/or indicator unit and to the programming unit.The accuracy of analyses carried out by the process and equipment according to the invention is identical with or higher than that of automatic titrators, and its velocity is identical with that of measurements carried out by flowthrough analysis channels, combining in this way all the advantages of both methods and measuring instruments.
摘要翻译： 本发明涉及用于液体样品选择性，快速和准确分析的方法和设备。 根据本发明的方法，允许液体或气体样品被液体吸收，以恒定的体积速率流动，并在一定时间内用足够量的试剂进行过量滴定。 然后试剂的流动在一定时间内降至零，同时以已知的方式连续跟随反应混合物中发生的变化。 通过将两个化学当量点的出现时间与标准溶液制备的校准曲线进行比较，进行浓度测定，所述时间与样品浓度具有明确的功能关系。
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2.发明授权
公开(公告)号：US4939410A
公开(公告)日：1990-07-03
申请号：US249742
申请日：1988-09-27
申请人： Geza Nagy , Jozsef Tarcali , Erno Pungor , Klara Toth , Veronika, nee Mohacsi Karpati , Zsofia Feher , Gyorgy Horvai , Peter Sarkany , Istvan Bokor
发明人： Geza Nagy , Jozsef Tarcali , Erno Pungor , Klara Toth , Veronika, nee Mohacsi Karpati , Zsofia Feher , Gyorgy Horvai , Peter Sarkany , Istvan Bokor
CPC分类号： G01N27/34
摘要： Electrode arrangement with liquid-metal electrode of controllable surface, comprising a liquid-metal reservoir, a capillary connected thereto through a controllable valve and contact means being in electric contact with the liquid-metal in the capillary. According to the invention at least one section of the capillary is formed within a metal body not reacting chemically with the liquid-metal, said metal body constituting the contact means. Preferably, the metal body is formed so that an elastic closing element of the valve fits to a surface of the metal body surrounding an opening of the capillary section formed therein.
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公开(公告)号：US4673295A
公开(公告)日：1987-06-16
申请号：US850431
申请日：1986-04-08
申请人： Erno Pungor , Klara S. Toth , Zsofia Feher , Geza Nagy , Gyorgy Horvai
发明人： Erno Pungor , Klara S. Toth , Zsofia Feher , Geza Nagy , Gyorgy Horvai
CPC分类号： G01N35/1083 , G01N2035/1086 , G01N27/48
摘要： In a method and an apparatus for performing routine analyses such as polarographic or spectrophotometric analysis on a large set of sample solutions filled into separate sample cups being arranged on or shaped in a sample cup holder (101) along a moving path, wherein the samples are in consecutive cycles sucked out of the sample cup (102) by a suction tube (103) and transferred into a common vessel, wherein the analysis will be performed. The vessel (105) has a lower outlet (107) communicating with an analyzer cell (112) or the ambient space over a channel (116) which is only effective if the sample level in the vessel (105) exceeds a certain threshold level, and an aspirating mouth (108) in the upper part of the vessel (105) communicating over a valve (109) with the ambient space. The suction tube (103) has a fixed end coupled to the inlet (106) of the vessel (105) and a free end can be moved into two different working positions. A continuous suction effect is exerted on the fixed end of the suction tube during the whole series of cycles whereas the free end of the suction tube is in the first phase of each cycle moved into its first working position wherein the free end is dipping into the next sample cup and being thus positioned opposite to the suction tube and in the second phase turned into its second working position wherein the free end is protruding into the ambient space. The analysis is performed when the level of the sample in the vessel has already exceeded a prescribed threshold level and at the end of the analysis operation an overpressure is established in the vessel. Then the suction tube, as the phase of the next following cycle, is moved again into its first working position and this series of operations is cyclically repeated.
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