中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.011 seconds)

    Nitrogen dioxide analysis
    2.
    发明授权
    Nitrogen dioxide analysis 失效
    二氧化氮分析

    公开(公告)号：US3870468A

    公开(公告)日：1975-03-11

    申请号：US26354372

    申请日：1972-06-16

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA M

    IPC: C01B21/26 ,  G01N21/76 ,  G01N31/00 ,  G01N33/00 ,  G01N31/12 ,  H05B3/10

    CPC classification number: C01B21/262 ,  G01N21/766 ,  G01N31/00 ,  G01N33/0013 ,  Y10T436/178459

    Abstract: A method and apparatus for converting nitrogen dioxide to nitric oxide for the ultimate reaction with ozone to cause a chemiluminescent reaction, the intensity of which is a function of the nitric oxide concentration. The method comprises passing the nitrogen dioxide through a small, confined volume and applying concentrated heat to the volume in the presence of suitable amounts of vitreous carbon. In one preferred embodiment the apparatus includes a quartz container and a filament constructed of vitreous carbon. In an alternative embodiment, loose vitreous carbon or a vitreous carbon rod is confined within the quartz container, and heat is applied by a heated stainless steel or nichrome filament surrounding the quartz container.

    Abstract translation: 用于将二氧化氮转化为一氧化氮以与臭氧最终反应以引起化学发光反应的方法和装置，其强度是一氧化氮浓度的函数。 该方法包括使二氧化氮通过小的限制体积，并在合适量的玻璃碳存在下将浓缩的热量施加到体积上。 在一个优选实施例中，该装置包括石英容器和由玻璃碳构成的细丝。 在替代实施例中，松散的玻璃碳或玻璃碳棒被限制在石英容器内，并且通过围绕石英容器的加热的不锈钢或镍铬丝来施加热量。

    Nitric oxide detection
    3.
    发明授权
    Nitric oxide detection 失效
    氮氧化物检测

    公开(公告)号：US3692485A

    公开(公告)日：1972-09-19

    申请号：US3692485D

    申请日：1971-07-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA M ,  BING COLIN C

    IPC: G01N21/76 ,  G01N21/26

    CPC classification number: G01N21/766 ,  Y10T436/177692

    Abstract: A METHOD OF MEASURING THE NITRIC OXIDE CONCENTRATION IN A GAS STREAM IS DISCLOSED. THE GAS STREAM IS MIXED WITH OZONE AT THE ENTRANCE TO A REACTION CHAMBER SO THAT THE MIXTURE ENTERS THE REACTION CHAMBER AS A POINT SOURCE. THE INTENSITY OF THE LIGHT EMITTED AS A RESULT OF THE CHEMILUMINESCENT REACTION BETWEEN THE OZONE AND THE NITRIC OXIDE AT THE POINT SOURCE IS MEASURED. THE INTENSITY OF THE EMITTED LIGHT A FUNCTION OF THE NITRIC OXIDE CONCENTRATION IN THE GAS STREAM, WHEREBY THE NITRIC OXIDE CONCENTRATION IS MEASURED. APPARATUS FOR MEASURING THE NITRC OXIDE CONCENTRATION IN A GAS STREAM IS ALSO DISCLOSED. THE APPARTUS INCLUDES A WALLED VESSEL HAVING A REACTION CHAMBER AND HAVING TWO INLET PASSAGES AND AN EXHAUST PASSAGE IN THE WALL THEREFORE. THE TWO INLET PASSAGES CONVERGE TOGETHER TO A COMMON INLET OPENING INTO THE CHAMBER. A LIGHT WINDOW IS POSITIONED IN THE WALL OF THE CHAMBER OPPOSITE AND IN CLOSE PROXIMITY TO THE COMMON INLET SO THAT THE LIGHT EMITTED BY A CHEMILUMINESCENT REACTION BETWEEN THE GASES AND THE TWO INLET PASSAGES AT THE COMMON INLET CAN BE MEASURED AS A POINT SOURCE. MEANS ARE ASSOCIALTED WITH THE LIGHT WINDOW FOR MEASURING THE LIGHT EMITTED BY THE CHEMILUMINESCENT REACTION.

    Chemiluminescent ammonia detection
    4.
    发明授权
    Chemiluminescent ammonia detection 失效
    化学发光氨检测

    公开(公告)号：US3904371A

    公开(公告)日：1975-09-09

    申请号：US44802174

    申请日：1974-03-04

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： NETI RADHAKRISHNA M ,  TURNER GEORGE S

    IPC: C01B21/26 ,  G01N31/00 ,  G01N21/52 ,  G01N31/10

    CPC classification number: G01N31/00 ,  C01B21/26 ,  Y10T436/175383

    Abstract: Ammonia content of a gaseous mixture is determined by converting the ammonia to nitric oxide and measuring the nitric oxide. A gaseous mixture sample is passed through a heated mixture of oxides of platinum group metals and/or copper oxide together with vitreous carbon whereby any gaseous ammonia is converted catalytically into nitric oxide. Using the chemiluminescent analysis technique, the ammonia content of the gaseous mixture sample may be monitored in a suitable instrument.

    Abstract translation: 通过将氨转化为一氧化氮并测量一氧化氮来确定气体混合物的氨含量。 将气体混合物样品通过加热的铂族金属和/或氧化铜的氧化物与玻璃碳一起加热，由此任何气态氨被催化转化成一氧化氮。 使用化学发光分析技术，可以在合适的仪器中监测气体混合物样品的氨含量。

    Nitric oxide analysis
    5.
    发明授权
    Nitric oxide analysis 失效
    氮氧化物分析

    公开(公告)号：US3652227A

    公开(公告)日：1972-03-28

    申请号：US3652227D

    申请日：1969-12-15

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： HARMAN JOHN N ,  NETI RADHAKRISHNA M

    IPC: G01N31/00 ,  B01D53/34 ,  C01B21/46 ,  G01N31/10

    CPC classification number: G01N31/002 ,  Y10T436/179228

    Abstract: Method and apparatus for determining the nitric oxide content of a sample gas stream. The nitric oxide in the gas stream is reacted with an excess amount of ozone so as to completely convert the nitric oxide into nitrogen dioxide. The resulting gas containing nitrogen dioxide and residual ozone is passed through a scrubber which removes the ozone and does not affect the nitrogen dioxide content of the gas. The resulting gas is then analyzed for its NO2 content, which is a function of the nitric oxide content of the sample gas. The method and apparatus may also be utilized for determining the total amount of nitrogen dioxide and nitric oxide in a sample gas. The invention is particularly applicable to the monitoring of air for air pollution control.

    Abstract translation: 用于确定样品气流的一氧化氮含量的方法和装置。 气流中的一氧化氮与过量的臭氧反应，以将一氧化氮完全转化为二氧化氮。 所产生的含有二氧化氮和残余臭氧的气体通过洗涤器，其除去臭氧并且不影响气体的二氧化氮含量。 然后分析所得气体的NO 2含量，其是样品气体的一氧化氮含量的函数。 该方法和装置也可用于确定样品气体中二氧化氮和一氧化氮的总量。 本发明特别适用于空气污染控制的空气监测。

    No2 analysis and scrubber therefor
    6.
    发明授权
    No2 analysis and scrubber therefor 失效
    NO2分析和SCRUBBER THEREFOR

    公开(公告)号：US3677708A

    公开(公告)日：1972-07-18

    申请号：US3677708D

    申请日：1969-12-15

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： HARMAN JOHN N ,  NETI RADHAKRISHNA M

    IPC: G01N1/34 ,  B01J11/06 ,  G01N31/06 ,  G01N31/10

    CPC classification number: G01N1/405 ,  Y10T436/178459

    Abstract: METHOD AND APPARTUS FOR DETERMINING NO2 IN A SAMPLE GAS STREAM CONTAINING INTERFERENTS UTILIZING A SCRUBBER AND AN ANALYTICAL INSTRUMENT WHICH IS SENSITIVE BOTH TO NO2 AND THE INTERFERENTS. THE SCRUBBER CONTAINS ARGENTIC OXIDE (AGO) WHICH EFFECTIVELY REMOVES BOTH POSITIVE AND NEGATIVE INTERENTS FROM THE SAMPLE GAS STREAM, BUT DOES NOT AFFECT THE NO2 CONTENT OF THE STREAM. THE INVENTION IS PARTICULARLY APPLICABLE TO THE MONITORING OF THE NO2 CONTENT OF POLLUTED AIR.

Patent Agency Ranking