-
公开(公告)号：US07161672B2
公开(公告)日：2007-01-09
申请号：US10798838
申请日：2004-03-12
IPC分类号： G01J3/28
CPC分类号： G01N21/31
摘要： Multi-ordered spectral data is obtained from various known substances and is stored in a spectral library. The identification of an unknown material is accomplished by correlating the sample's multi-ordered spectrum against all or a portion of the spectrum in the library, and finding the closest match.
摘要翻译： 从多种已知物质获得多序谱图数据，并存储在光谱库中。 通过将样本的多次谱与库中的全部或部分光谱相关联并找到最接近的匹配来实现未知物质的识别。
-
2.发明授权Automatic correction for continuum background in laser induced breakdown and Raman spectroscopy 失效自动校正激光诱导击穿和拉曼光谱的连续背景公开(公告)号：US06987564B2
公开(公告)日：2006-01-17
申请号：US10411193
申请日：2003-04-11
IPC分类号： G01J3/44
CPC分类号： G01J3/44 , G01N21/65 , G01N21/718
摘要： The approximation of a spectral continuum by determining a plurality of minima in the spectral data; splitting the spectral data into a predetermined number of groups N; for each group of spectral data, determining major minima for the group, and calculating an average and a standard deviation for the determined major minima; determining a polynomial function that can be drawn through the major minima of all groups; for each group of spectral data, determining minor minima; calculating an average deviation (ΦN) between this polynomial function and the determined minor minima; reducing the number of groups, and repeating this process for the reduced number of groups until a minimum number of groups is reached. Then, the least ΦN corresponding to an optimal number of groups Nopt is determined. The spectral data is split into Nopt groups; and a polynomial function that can be drawn through both the major minima and minor minima is determined for Nopt groups. This polynomial function approximates the spectral continuum.
摘要翻译： 通过确定光谱数据中的多个最小值来近似光谱连续谱; 将光谱数据分解成预定数量的组N; 对于每组光谱数据，确定组的主要最小值，并计算所确定的主要最小值的平均值和标准偏差; 确定可以通过所有组的主要最小值绘制的多项式函数; 对于每组光谱数据，确定次要最小值; 计算该多项式函数与确定的次要最小值之间的平均偏差（Phi N N N）; 减少组的数量，并重复此过程以减少组数，直到达到最小组数。 然后，确定对应于最佳数量组N SUB选择的最小Phi
N 。 频谱数据被分成N个选择组; 并且可以通过主要最小值和次要最小值绘制的多项式函数被确定为N个选择组。 该多项式函数近似于光谱连续谱。 -
公开(公告)号：US5088820A
公开(公告)日：1992-02-18
申请号：US578839
申请日：1990-09-07
CPC分类号： G01N27/628 , G01J3/44
摘要： Raman spectroscopy uses a resonance ionization detector. In particular, a first laser source is provided for application of laser energy to a sample cell. A second laser source provides energy to the ionization detector, which ionization detector includes metal vapor having at least three energy states or levels. The laser from the second laser source has a frequency such that it will promote the metal vapor from one of its levels to a higher level, whereas the first laser source is tunable such that upon Raman scatter from the sample cell promoting the metal vapor as well, the metal atoms will be ionized and the ionization detector will detect the scatter from the sample material. The scatter from the sample cell is provided to the ionization detector by way of an optical coupler such as a lens. The ionization detector may be a flame-type ionization detector, a metal vapor cell ionization detector, for a glow discharge tube (such as a hollow cathode lamp) ionization detector.
摘要翻译： 拉曼光谱使用共振电离检测器。 特别地，提供第一激光源用于将激光能量施加到样品池。 第二激光源向电离检测器提供能量，该电离检测器包括具有至少三种能量状态或水平的金属蒸气。 来自第二激光源的激光具有这样的频率，使得其将金属蒸气从其一个水平促进到更高的水平，而第一激光源是可调谐的，使得在来自促进金属蒸气的样品池的拉曼散射以及 ，金属原子将被离子化，电离检测器将检测来自样品材料的散射。 来自样品池的散射通过诸如透镜的光耦合器被提供给电离检测器。 电离检测器可以是用于辉光放电管（例如空心阴极灯）电离检测器的火焰型离子化检测器，金属蒸汽池电离检测器。
-
公开(公告)号：US4413504A
公开(公告)日：1983-11-08
申请号：US382633
申请日：1982-05-27
CPC分类号： G01N30/74 , G01N2030/642 , G01N30/78
摘要： A liquid-phase chromatography detector comprising a flow cell having an inlet tubular conduit for receiving a liquid chromatographic effluent and discharging it as a flowing columnar stream onto a vertically adjustable receiving surface spaced apart from and located vertically below and in close proximity to the discharge end of the tubular conduit; a receiver adapted to receive liquid overflowing from the receiving surface; an exit conduit for continuously removing liquid from the receiver; a light source for focussing fluorescence-producing light pulses on the flowing columnar stream as it passes from the outlet of the conduit to the receiving surface and a fluorescence detector to detect the produced fluorescence; a source of light pulse for producing acoustic waves in the columnar stream as it passes from the conduit outlet to the receiving surface; and a piezoelectric transducer adapted to detect those waves; and a source of bias voltage applied to the inlet tubular conduit and adapted to produce ionization of the liquid flowing through the flow cell so as to produce photocurrents therein and an electrical system to detect and record the photocurrents. This system is useful in separating and detecting individual chemical compounds from mixtures thereof.
摘要翻译： 一种液相色谱检测器，其包括具有入口管状管道的流动池，该入口管状管道用于接收液体色谱流出物并将其作为流动柱状流排放到垂直可调的接收表面上，该接收表面与排放端 的管状导管; 接收器，适于接收从接收表面溢出的液体; 用于从接收器连续地去除液体的出口管道; 一个光源，用于在流动的柱状流从导管的出口传递到接收表面时聚焦产生荧光的光脉冲，以及荧光检测器以检测产生的荧光; 柱状流当从管道出口流到接收表面时产生声波的光脉冲源; 以及适于检测这些波的压电换能器; 以及施加到入口管状导管的偏置电压源，并且适于产生流过流动池的液体的电离以便在其中产生光电流，以及用于检测和记录光电流的电气系统。 该系统可用于从其混合物中分离和检测单个化合物。
-
公开(公告)号：US6008496A
公开(公告)日：1999-12-28
申请号：US72581
申请日：1998-05-05
CPC分类号： H01J47/02
摘要： A resonance ionization imaging device (RIID) and method for imaging objects using the RIID are provided, the RIID system including a RIID cell containing an ionizable vapor including monoisotopic atoms or molecules, the cell being positioned to intercept scattered radiation of a resonance wavelength .lambda..sub.1 from the object which is to be detected or imaged, a laser source disposed to illuminate the RIID cell with laser radiation having a wavelength .lambda..sub.2 or wavelengths .lambda..sub.2, .lambda..sub.3 selected to ionize atoms in the cell that are in an excited state by virtue of having absorbed the scattered resonance laser radiation, and a luminescent screen at the back surface of the RIID cell which presents an image of the number and position of charged particles present in the RIID cell as a result of the ionization of the excited state atoms. The method of the invention further includes the step of initially illuminating the object to be detected or imaged with a laser having a wavelength selected such that the object will scatter laser radiation having the resonance wavelength .lambda..sub.1.
摘要翻译： 提供了一种用于使用RIID对物体进行成像的共振电离成像装置（RIID）和方法，所述RIID系统包括含有包含单同位素原子或分子的可电离蒸气的RIID电池，所述电池被定位成截取共振波长λ1的散射辐射 从要被检测或成像的物体上的激光源被设置为用激光辐射照射RIID电池，该激光辐射具有波长λ2或波长λ2，λ3，其被选择为使得电池中处于激发态的原子离子化 已经吸收了散射的共振激光辐射，并且在RIID单元的后表面处的发光屏幕，其呈现作为激发态原子电离的结果存在于RIID单元中的带电粒子的数量和位置的图像。 本发明的方法还包括首先用选择的波长的激光照射待检测或成像的物体的步骤，使得物体将散射具有共振波长λ1的激光辐射。
-
6.发明授权Method and apparatus for scientific analysis under low temperature vacuum conditions 失效低温真空条件下科学分析的方法和装置
公开(公告)号：US4942134A
公开(公告)日：1990-07-17
申请号：US157788
申请日：1988-02-19
CPC分类号： G01N35/1079 , G01N1/42 , G01N2021/0335 , G01N2030/8417 , G01N21/6402 , G01N21/84
摘要： A method and apparatus for scientific analysis of a sample under low temperature vacuum conditions uses a vacuum chamber with a conveyor belt disposed therein. One end of the conveyor belt is a cool end in thermal contact with the cold stage of a refrigerator, whereas the other end of the conveyor belt is a warm end spaced from the refrigerator. A septum allows injection of a sample into the vacuum chamber on top of the conveyor belt for spectroscopic or other analysis. The sample freezes on the conveyor belt at the cold end. One or more windows in the vacuum chamber housing allow spectroscopic analysis of the sample. Following the spectroscopic analysis, the conveyor belt may be moved such that the sample moves toward the warm end of the conveyor belt where upon it evaporates, thereby cleaning the conveyor belt. Instead of injecting the sample by way of a septum and use of a syringe and needle, the present device may be used in series with capillary-column gas chromatography or micro-bore high performance liquid chromatography.
摘要翻译： 在低温真空条件下对样品进行科学分析的方法和装置使用设置有输送带的真空室。 传送带的一端是与冰箱的冷平台热接触的冷端，而传送带的另一端是与冰箱隔开的暖端。 隔膜允许将样品注入到传送带顶部的真空室中用于光谱或其他分析。 样品在冷端的传送带上冻结。 真空室外壳中的一个或多个窗口允许对样品进行光谱分析。 在进行光谱分析之后，传送带可以移动，使得样品朝着传送带的温暖端移动，在其上蒸发，从而清洁传送带。 代替通过隔膜注射样品并使用注射器和针头，本装置可以与毛细管柱气相色谱法或微孔高效液相色谱法串联使用。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.011 秒)