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    Electrochemical cell
    1.
    发明授权
    Electrochemical cell 失效

    公开(公告)号：US3686091A

    公开(公告)日：1972-08-22

    申请号：US3686091D

    申请日：1970-10-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： SAWA KENNETH B ,  NETI RADHAKRISHNA MURTY

    IPC: G01N27/333 ,  G01N27/416 ,  G01N27/30 ,  G01N27/40

    CPC classification number: G01N27/4166 ,  G01N27/3335

    Abstract: THE DISCLOSURE RELATES TO AN IMPROVEMENT IN AN ELECTROCHEMICAL CELL FOR USE IN ION POTENTIAL MEASUREMENTS OF SOLUTIONS THE CELL CONTAINS A SENSING ELECTRODE, A REFERENCE ELECTRODE, AND AN EXTERNAL ELECTROLYTE COMPRISING THE SOLUTION TO BE TESTED. AT LEAST ONE ELECTRODE COMPRISES AN INTERNAL HALF CELLS SUPPORTED IN A CONTAINER OF NONCONDUCTIVE MATERIAL CONTAINING A SALT SOLTUION, AN INTERNAL ELECTROLYTE AND A LIQUID JUNCTION STRUCTURE OF AN ION PERMEABLE MATERIAL. THE IMPROVEMENT COMPRISES A SURFACTANT ADDED TO THE CELL SO THAT THE CONTACT ANGLE BETWEEN THE SOLUTION AND THE LIQUID JUNCTION STRUCTURE IS LESS THAN ABOUT 90*. AS A RESULT THE LIQUID JUNCTION STRUCTURE IS MADE MORE PERMEBLE TO WATER MOLECULES. AN IMPROVED ELECTROCHEMICAL ELECTRODE FOR USE IN ION POTENIAL MEASUREMENTS OF SOLUTIONS IS ALSO DISCLOSED.

    Chemiluminescent detection of ozone
    2.
    发明授权
    Chemiluminescent detection of ozone 失效
    化学发光检测臭氧

    公开(公告)号：US3881869A

    公开(公告)日：1975-05-06

    申请号：US37548173

    申请日：1973-07-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA MURTY ,  REEVES GEORGE I

    IPC: G01N21/76 ,  G01N31/00 ,  G01N31/10

    CPC classification number: G01N21/766 ,  G01N31/00 ,  Y10T436/206664

    Abstract: The concentration of ozone in a gas sample, such as ambient air, can be quantitatively measured by contacting the gas sample with an organic polymer having a backbone chain consisting of carbon atoms to produce a chemiluminescent reaction and measuring the intensity of light emitted by the reaction. The polymer undergoes no apparent chemical change, indicating that it functions as a catalyst in the chemiluminescent reaction.

    Abstract translation: 可以通过使气体样品与具有由碳原子构成的主链的有机聚合物接触以产生化学发光反应并测量由反应发射的光的强度来定量测量气体样品中的臭氧浓度，例如环境空气， 。 聚合物不发生明显的化学变化，表明其在化学发光反应中起催化剂的作用。

    NITRIC OXIDE ANALYSIS
    4.
    发明专利
    NITRIC OXIDE ANALYSIS 未知

    公开(公告)号：AU3640171A

    公开(公告)日：1973-03-29

    申请号：AU3640171

    申请日：1971-12-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA MURTY ,  FRAIN JOHN PATRICK ,  HARMAN JOHN NEPOMUCENE III

    IPC: G01N1/34 ,  G01N31/00 ,  B01D53/04 ,  G01N31/06

    Abstract: A method of analyzing nitric oxide (NO) in a gas stream containing nitrogen dioxide (NO2) and a scrubber apparatus for selectively removing nitrogen dioxide from a gas stream containing nitric oxide. The scrubber apparatus comprises a container having an inlet port for the gas stream and an outlet port. The scrubber material in the container includes silver carbonate whereby the scrubber has an efficiency of at least about 99% and a capacity of about 11.5 parts per million hours of 99% nitrogen dioxide removal per gram of silver carbonate. The method involves passing the gas stream through a scrubber material containing silver carbonate so as to remove nitrogen dioxide from the gas stream while passing the nitric oxide unattenuated and thereafter conveying the gas stream from the scrubber material to an analyzer for nitric oxide. The gas stream is analyzed with the analyzer to determine the nitric oxide concentration therein.

    6.
    发明专利
    未知

    公开(公告)号：DE2231466A1

    公开(公告)日：1973-01-18

    申请号：DE2231466

    申请日：1972-06-27

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： BING COLIN CORNELIUS ,  NETI RADHAKRISHNA MURTY

    IPC: G01N21/76 ,  G01N21/52

    Abstract: 1325976 Detecting nitric oxide BECKMAN INSTRUMENTS Inc 27 March 1972 [2 July 1971] 14211/72 Heading G1A In an apparatus for detecting nitric oxide, ozone and the sample (containing nitric oxide) are passed via separate channels 14, 16 which join at the entrance 22 to a reaction chamber 12 so that the light formed by their chemi-luminescent reaction at the entrance is effectively a point source, and its intensity is measured by a photo-multiplier 28 outside the chamber 12 receiving light that has passed through a filter 24. The results of tests under several different conditions are disclosed.

    8.
    发明专利
    未知

    公开(公告)号：DE2806208A1

    公开(公告)日：1978-08-17

    申请号：DE2806208

    申请日：1978-02-14

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： GRAHAM LAURENCE DRELL ,  NETI RADHAKRISHNA MURTY

    IPC: G01N21/64 ,  G01N21/52

    Abstract: Method and apparatus for improved detection of sulfur dioxide by fluorescence are disclosed wherein the effects of interferent hydrocarbons in the test sample are eliminated. In apparatus detecting sulfur dioxide by detecting the fluorescence of sulfur dioxide from narrow band ultraviolet radiation by photomultiplier means, the test sample being fed to the fluorescence chamber is first passed through a reactor to oxidize the hydrocarbons from the sample. The effect of this oxidization is to convert interfering hydrocarbon components in the sample gas into non-interfering materials. In one embodiment employing ozone, moisture removal apparatus is added prior to the oxidization reaction to prevent the error producing formation of H2SO4.

    10.
    发明专利
    未知

    公开(公告)号：DE2231459A1

    公开(公告)日：1973-01-18

    申请号：DE2231459

    申请日：1972-06-27

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA MURTY ,  ROCKS RAYMOND EWALT

    IPC: C01B21/26 ,  G01N21/76 ,  C01B21/24

    Abstract: 1360527 Preparation of nitric oxide BECKMAN INSTRUMENTS Inc 27 March 1972 [2 July 1971] 14210/72 Heading C1A [Also in Division G1] Nitrogen dioxide is converted to nitric oxide by maintaining the nitrogen dioxide substantially at atmospheric pressure and at a temperature within the range 40‹ C. to 130‹ C., and exposing the nitrogen dioxide to ultraviolet radiation, whereby the nitrogen dioxide is converted to nitric oxide. The radiation preferably has a wavelength within the range 1849Š to 6600Š and more preferably within the range 1849Š to 4070Š. The process can be used as a method of quantitatively measuring the presence of nitrogen dioxide in a gas comprising converting the nitrogen dioxide to nitric oxide as described above, reacting the nitric oxide with ozone and measuring the light emitted by the reaction.

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