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    Measuring method for low background radioactivity
    11.
    发明专利
    Measuring method for low background radioactivity 失效
    用于低背景放射性的测量方法

    公开(公告)号：JPS5965781A

    公开(公告)日：1984-04-14

    申请号：JP17610082

    申请日：1982-10-08

    Applicant: Aloka Co Ltd

    Inventor： TOKUNAGA NOBORU ,  SAITOU GOICHI

    IPC: G01T1/167

    CPC classification number: G01T1/167

    Abstract: PURPOSE:To reduce the background count value within a measuring room and to improve accuracy for measurement of radioactivity, by filling gas containing no radioactive substance into the measuring room when the radiant rays are detected. CONSTITUTION:A measuring barrel 40 made of a material containing a small amount of radioactive impurities such as oxygen-free copper, etc. forms a measuring room 44 of a measurement bottle 42. A feed pipe 60 and a discharge pipe 62 are fixed at the lower part of the barrel 40. A lift 58 is positioned and fixed at the lower end of the barrel 40 to seal up the inside of the room 44, and then the gas containing no radioactive material like nitrogen, etc. is supplied continuously into the room 44 through the pipe 60. As a result, the gas containing a radioactive substance within the room 44 is discharged through the pipe 62. Thus the room 44 is always filled with the gas containing no radioactive substance. The background count value within the room 44 is reduced, and then the radiant rays are detected by a center detector 49 and a reverse simultaneous detector 54.

    Abstract translation: 目的：为了减少测量室内的背景计数值，提高测量放射性的准确性，当检测到辐射线时，将不含放射性物质的气体填充到测量室。 构成：由含有少量放射性杂质如无氧铜等的材料制成的测量筒40形成测量瓶42的测量室44.进料管60和排出管62固定在 升降机58定位并固定在筒体40的下端，以密封房间44的内部，然后将不含放射性物质如氮气等的气体连续地供应到 室44通过管道60.结果，在房间44内容纳放射性物质的气体通过管道62排出。因此，房间44总是被不含放射性物质的气体填充。 室44内的背景计数值减小，然后由中心检测器49和反向同步检测器54检测辐射线。

    ANALYZER FOR TRACE COMPONENT IN TEST SUBSTANCE
    13.
    发明专利
    ANALYZER FOR TRACE COMPONENT IN TEST SUBSTANCE 失效

    公开(公告)号：JPS55155236A

    公开(公告)日：1980-12-03

    申请号：JP6223179

    申请日：1979-05-22

    Applicant: ALOKA CO LTD

    Inventor： ARAYAMA HIROSHI ,  TOKUNAGA NOBORU ,  TAGUCHI IKUO

    IPC: G01N33/483 ,  C12M1/34 ,  G01N21/76

    Abstract: PURPOSE:To achieve analysis of trace component proportional to the level of the luminance quickly with a better sensitivity by introducing luminance from the mixture of the test substance and a reagent in a black box to a photoelectric multiplier through optical fiber and the electric output of the multiplier is counted. CONSTITUTION:The test substance and the reagent which causes luminance when added thereto are put and mixed in a vial 14 outside the black box 10 and simultaneously the switch 34 is turned on. Both the test substance and the reagent starts reaction to produce luminance. The vial is inserted into a container 12 immediately and the first optical shutter 18 is closed while the second shutter 27 is opened. Introduced through optical fiber 24, the luminance in the vial 14 enters a light detecting surface 26a of the photoelectric multiplier 26, which provides the electric output proportional to the level of luminance. As the output is counted by an amplification counting circuit 28 and the counting time is controlled as specified by the timer of a time setting circuit 32, counting is performed only for the specified reaction time after a given time elapses from the start of the luminance. The discrete value of the circuit is digitally indicated on the display for analysis and indication of the trace component in the test substance corresponding to the level of the luminance.

    ANALYSIS FOR TRACE COMPONENT IN TEST PIECE
    14.
    发明专利
    ANALYSIS FOR TRACE COMPONENT IN TEST PIECE 失效

    公开(公告)号：JPS55155235A

    公开(公告)日：1980-12-03

    申请号：JP6223079

    申请日：1979-05-22

    Applicant: ALOKA CO LTD

    Inventor： ARAYAMA HIROSHI ,  TOKUNAGA NOBORU ,  TAGUCHI IKUO

    IPC: G01N33/483 ,  C12M1/34 ,  G01N21/76

    Abstract: PURPOSE:To achieve analysis of trace components proportional to the level of luminace quickly with a better sensitivity by putting a specified amount of the test piece and the reagent into the storage of the black box to react thereto and the electric output of the photoelectric multiplier is counted. CONSTITUTION:The test piece and the reagent are put into the specified amount detection cell 14 with distributors 40 and 42 from the test piece container 36 and the reagent container 38 and simulanteously, the switch 34 is turned on. With the mixing, the test piece and the reagent start chemical and biochemical reaction and the luminance is caused corresponding to the trace component in the test piece. The luminance in the cell is made incident on the light detecting surface 24a of the photoelectric multiplier 24 through the transparent plate 20, which provides the electric output proportional to the level of luminance. The ouput is counted by the amplification counting circuit 28, where the counting time is controlled as specified by the timer of the time setting circuit 32. The counted value by the circuit 28 is digitally indicated on the display 30 for analysis and indication of the trace component in the test piece corresponding to the level of the luminance.

    ANALYTICAL APPARATUS FOR MINOR CONSTITUENT IN SPECIMEN
    15.
    发明专利
    ANALYTICAL APPARATUS FOR MINOR CONSTITUENT IN SPECIMEN 失效

    公开(公告)号：JPS55154440A

    公开(公告)日：1980-12-02

    申请号：JP6222879

    申请日：1979-05-22

    Applicant: ALOKA CO LTD

    Inventor： ARAYAMA HIROSHI ,  TOKUNAGA NOBORU ,  TAGUCHI IKUO

    IPC: G01N21/76

    Abstract: PURPOSE:To analyze the minor constituent in the specimen with high sensitivity and in a short time by detecting the light emission which occurs when a reagent is added into the specimen by a photoelectric multiplier. CONSTITUTION:A light-shielding chamber 22 provided with a second shutter 26 in the upper part and installed with a photoelectric multiplier 24 is disposed below the dark box 10 having a housing part 12 and provided with a transparent plate 20 in the bottom and the first shutter 18 in the housing port 16 in the upper part. The specimen and reagent are injected and mixed in a vial 14 and light emission is induced in the minor constituent in the specimen. The vial is immediately inserted into the housing part 12, thence the first shutter is closed and the second shutter 26 opened. At the same time, a time setting circuit 32 is operated by a switch 34 to count the signals from the photoelectric multiplier 24 having detected the light emission be counted in an amplifying and counting circuit 28 for the specified time T2 (t1 is reaction starting time, t2 count starting time and t3 count end time). This is then displayed as the analyzed value of the minor constituent in a display device 30.

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