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    • 1. 发明授权
    • Analysis method for gases and apparatus therefor
    • 气体及其设备分析方法
    • US6040915A
    • 2000-03-21
    • US147349
    • 1998-12-07
    • Shang-Qian WuJun-ichi MorishitaYoshio IshiharaTetsuya Kimijima
    • Shang-Qian WuJun-ichi MorishitaYoshio IshiharaTetsuya Kimijima
    • G01N21/39G01N21/61
    • G01N21/39G01N21/3504
    • A method for analyzing an impurity in a gas including the steps of: introducing a gas with an impurity into a first cell; introducing a gas with no impurity into a second cell; maintaining identical pressures in the first and second cells; irradiating a light from a light irradiating source; varying the frequency of the light over a frequency spectrum including an absorption frequency of the impurity; splitting the light by a splitting device in order to pass a first beam through the first cell and to pass a second beam through the second cell; measuring the intensity of the light passing through the first cell over the frequency spectrum with a first measuring device and the intensity of the light passing through the second cell over the frequency spectrum with a second measuring device; and determining an absorption spectrum of the impurity in the gas based on the difference between data measured with the first measuring device and data from measured with the second measuring device.
    • PCT No.PCT / JP98 / 01608 Sec。 371日期1998年12月7日第 102(e)日期1998年12月7日PCT提交1998年4月8日PCT公布。 WO98 / 45686 PCT公开 日期:1998年10月15日一种用于分析气体中的杂质的方法,包括以下步骤:将具有杂质的气体引入第一电池; 将无杂质的气体引入第二电池; 在第一和第二细胞中保持相同的压力; 照射来自光照射源的光; 在包括杂质的吸收频率的频谱上改变光的频率; 通过分离装置分离光,以使第一光束通过第一单元并使第二光束通过第二单元; 利用第一测量装置测量在频谱上通过第一单元的光的强度,并用第二测量装置测量通过频谱通过第二单元的光的强度; 以及基于由第一测量装置测量的数据与由第二测量装置测量的数据之间的差异来确定气体中的杂质的吸收光谱。
    • 10. 发明授权
    • Gas analyzing apparatus
    • US06550308B2
    • 2003-04-22
    • US10117599
    • 2002-04-04
    • Tsutomu KikuchiAkira NishinaTetsuya Kimijima
    • Tsutomu KikuchiAkira NishinaTetsuya Kimijima
    • G01N3004
    • G01N30/7206G01N2030/201G01N2030/8886
    • There is provided a gas analyzing apparatus capable of minimizing gas remaining by integrating gas switching apparatuses into one and capable of analyzing impurities of ppb level to sub-ppb level contained in various kinds of high-purity gases efficiently and accurately. The gas analyzing apparatus comprises an analyzer introduction passage 22 for introducing a sample gas supplied from a sample gas source 11 into an analyzer 12 via an analyzer introduction valve 22V; a separator introduction passage 23 diverging from a first side passage of the analyzer introduction valve 22V for introducing a sample gas into a separator 13 via a separator introduction valve 23V; a separator flowing-out passage 24 for introducing the sample gas flowing out from the separator 13 into a second side passage of the analyzer introduction valve 22V via a separator flowing-out valve 24V; and a gas switching apparatus to be such formed that when the analyzer introduction valve 22V is opened, the separator introduction valve 23V and the separator flowing-out valve 24V are connectively operated to be closed, and when the analyzer introduction valve 22V is closed, the separator introduction valve 23V and the separator flowing-out valve 24V are connectively operated to be opened.