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    • 101. 发明授权
    • Heating unit for vaporizing sample by heating
    • 通过加热使样品蒸发的加热单元
    • US6067402A
    • 2000-05-23
    • US141524
    • 1998-08-27
    • Fumihide Kikuchi
    • Fumihide Kikuchi
    • B01D1/00B01D3/34B01L99/00G01N1/00G01N5/04A01G13/06G01N30/02
    • G01N5/045B01D1/0011B01D3/346G01N1/22
    • A heating unit vaporizes a sample placed in a container having an opening that is hermetically sealed with a rubber gasket and discharges the vaporized constituents to the outside of the container together with a carrier gas. A sample 16, such as an easy-to-vaporize liquid, is placed in a container 1 whose opening 1a is hermetically sealed with a rubber gasket 2a. The container 1 is loaded into a heating tube 8 to extract the vaporizable constituents. The heating tube 8 is equipped with carrier gas introduction tubes 12 having needles 4 with through-holes, a vaporized constituent and carrier gas discharge tube 13 having a needle 5 with a through-hole, and a heater 11. These needles 4 and 5 are arranged to pierce the rubber gasket 2a of the container 1 placed in the heating tube 8.
    • 加热单元将放置在具有用橡胶垫密封的开口的容器中放置的样品蒸发,并将气化成分与载气一起排出到容器的外部。 将样品16,例如容易蒸发的液体放置在容器1中,其开口1a用橡胶垫圈2a气密密封。 将容器1装载到加热管8中以提取可汽化的组分。 加热管8配备有具有带有通孔的针4的载气引入管12,具有带有通孔的针5的蒸发成分和载气排出管13以及加热器11.这些针4和5是 布置成刺穿放置在加热管8中的容器1的橡胶垫圈2a。
    • 102. 发明授权
    • Sampling arrangement for thermal gravimetric analyzer
    • 热重分析仪采样布置
    • US5440120A
    • 1995-08-08
    • US223163
    • 1994-04-05
    • Dean E. RobertsRobert L. Wolfe
    • Dean E. RobertsRobert L. Wolfe
    • G01N1/00G01N5/04H01J49/00B01D59/44
    • G01N5/04G01N1/22
    • A thermal gravimetric analyzer includes a reaction tube disposed within a heating element and including a sample container disposed therein. A reaction gas is introduced at a first end of the reaction tube and allowed to react with the sample, while a purge gas is introduced at a second, opposed end of the reaction tube to isolate a beam system, from which the sample and sample container are suspended, from the reaction gas. A Fourier transform infrared (FTIR) spectrometer as well as a mass spectrometer coupled to the reaction tube may be used to analyze the off-gas products of the reaction of the sample with the reaction gas. Sniffer tubes are used to provide off-gas samples to the two spectrometers, with each sniffer tube having a first inlet end disposed immediately adjacent the sample container and a second outlet end coupled to a sample inlet port of a respective spectrometer. The sniffer tubes increase off-gas product measurement sensitivity by reducing the total volume of gas analyzed and increasing the concentration of the off-gas products within the volume of the gas being analyzed.
    • 热重分析器包括设置在加热元件内并包括设置在其中的样品容器的反应管。 在反应管的第一端引入反应气体并使其与样品反应,同时在反应管的第二相对端引入吹扫气体,以分离出束系统,样品和样品容器 从反应气体中悬浮。 可以使用傅立叶变换红外(FTIR)光谱仪以及耦合到反应管的质谱仪来分析样品与反应气体的反应的废气产物。 嗅探管用于向两个光谱仪提供废气样品,每个嗅探管具有紧邻样品容器设置的第一入口端和与相应光谱仪的样品入口相连的第二出口端。 嗅探管通过减少分析气体的总体积并增加废气产品在被分析气体体积内的浓度来提高尾气产品测量灵敏度。
    • 103. 发明授权
    • Method and apparatus for high resolution analysis
    • 高分辨率分析方法和装置
    • US5368391A
    • 1994-11-29
    • US979168
    • 1992-11-18
    • Benjamin S. CroweSteven R. Sauerbrunn
    • Benjamin S. CroweSteven R. Sauerbrunn
    • G01N21/76G01N5/04G01N25/00G01N25/20G01N25/48G06F17/10G06F17/14G01N25/18
    • G01N5/04G01N25/4833
    • The present invention relates to analytical methods for determining the composition of a material that undergoes a transition as a function of a driving variable. As applied to thermogravimetric analysis (TGA), a first preferred embodiment comprises (1) decreasing the heating rate when deviations from a baseline signal are detected; (2) establishing a minimum heating rate; (3) forcing the heating rate to a predetermined maximum whenever the rate of change of the weight change with respect to the temperature falls below a predetermined value; and (4) adjusting the heating rate according to the rate of change of the weight of the sample to track a predetermined rate of change of the weight of the sample. A second preferred embodiment comprises (1) selecting either a high-productivity or a high-resolution mode; (2) in both modes, controlling the rate of temperature increase according to a function containing an exponential term, wherein the argument of the exponential term includes the percent weight change per unit time of the sample; (3) in the high-productivity mode, choosing the function so that when the percentage weight change per minute of the sample is small, the heating rate approaches the maximum allowed heating rate, and when the percentage weight change per minute is very large, the heating rate approaches zero; (4) in the high-resolution mode, choosing the function such that the heating rate is held at almost zero during a transition.
    • 本发明涉及用于确定作为驱动变量的函数的经历转变的材料的组成的分析方法。 如应用于热重分析(TGA),第一优选实施方案包括(1)当检测到与基线信号的偏离时降低加热速率; (2)建立最低加热速率; (3)当重量变化率相对于温度降低到预定值以下时,强制加热速率达到预定最大值; 和(4)根据样品重量的变化率来调节加热速率以跟踪样品重量的预定变化率。 第二优选实施例包括(1)选择高生产率或高分辨率模式; (2),根据包含指数项的函数控制温度升高速率,其中指数项的自变量包括样本每单位时间的百分比重量变化; (3)在高生产率模式下,选择功能使得当样品的每分钟重量变化百分比小时,加热速率接近最大允许加热速率,当每分钟重量变化百分比非常大时, 加热速率接近零; (4)在高分辨率模式下,选择功能,使得转换期间加热速率保持在几乎为零。
    • 106. 发明授权
    • Separating of fibers from a fiber-containing solid sample
    • 从含纤维的固体样品中分离纤维
    • US5160578A
    • 1992-11-03
    • US513397
    • 1990-04-23
    • Ronald D. JonesJoseph B. Cross
    • Ronald D. JonesJoseph B. Cross
    • G01N1/28G01N5/04
    • G01N1/4077G01N5/04Y10T436/25Y10T436/25125Y10T436/255
    • A method is provided for separating fibers from a solid sample which includes a solid material having fibers embedded therein. A first chamber, containing the sample, and a second chamber are defined within an appropriate vessel(s) such that the first chamber is positioned generally above the second chamber, and a filter is positioned between the chambers. At least one conduit, having at least one valve associated therewith, is further provided which is in fluid communication with the second chamber. Closure of such valve(s) substantially seals the second chamber except for fluid communication of the second chamber with the first chamber through the filter. While the second chamber is in such a sealed condition, digestion liquid is introduced to the first chamber so as to at least partially immerse the sample, whereupon liquid flows through the filter and into the second chamber so as to progressively increase the gas pressure in the second chamber to thereby progressively decrease the flow of liquid into the second chamber. After a predetermined digestion period, the valve(s) is opened to allow withdrawal of gases from the second chamber to thereby reduce the pressure therein and allow liquid remaining in the first chamber to flow into the second chamber.
    • 提供了一种从固体样品中分离纤维的方法,该固体样品包括其中嵌有纤维的固体材料。 包含样品的第一腔室和第二腔室限定在合适的容器内,使得第一腔室大致位于第二腔室的上方,并且过滤器位于腔室之间。 还提供至少一个具有与其相关联的至少一个阀的管道,其与第二室流体连通。 这种阀的关闭基本上密封第二室,除了第二室与第一室通过过滤器的流体连通之外。 当第二室处于这样的密封状态时,将消解液引入第一室,以至少部分地浸没样品,于是液体流过过滤器并进入第二室,以便逐渐增加在第二室中的气体压力 从而逐渐减少液体进入第二室的流动。 在预定的消化周期之后,打开阀以允许从第二室抽出气体,从而减小其中的压力,并允许残留在第一室中的液体流入第二室。