Abstract:
In an axial-flow cylindrical preparative chromatography column that utilizes a piston to close off the top of the resin space inside the column and thereby eliminate void spaces at the top of the resin, a sight glass is incorporated in the column wall to allow monitoring of the packing height and density as the packing material is being placed inside the column, as well as the position of the piston head relative to the packing while the piston is being lowered to consolidated and/or compress the packing. By observing the column interior through the sight glass, the operator can assure that the column receives a more uniform packing density and can minimize the risk of damage to the packing material by excessive force from the piston head.
Abstract:
본 발명은 다공성 폴리머가 삽입된 마이크로 채널에 관한 것이다. 더욱 상세하게는, 본 발명은 채널 본체 및 분석 시료와 시약과의 반응 표면적을 국소적으로 극대화시키고 마이크로 채널 내의 유체의 흐름을 조절하는 밸브 역할을 하기 위하여 상기 채널 본체의 표면에 삽입되는 다공성 폴리머를 포함하는 마이크로 채널에 대한 것이다.
Abstract:
An improved capillary column for gas chromatography, characterised by consisting of a single capillary tube (2) presenting at least two stationary phases (4, 6) of different characteristics, mutually distinct along said tube.
Abstract:
The invention relates to a device for detecting the presence of an analyte in an interfering fraction containing fluid or semi-fluid sample, said device comprises:(a) a transparent housing,(b) inlet means for the sample to be analyzed,(c) outlet means, and(d) at least two discrete superposed layers being a first and a second layer through which at least a part of the sample is able to be transported in said order, characterized in that the first layer comprises an adsorbent medium capable of adsorbing at least a part of the interfering fraction of the sample and the second layer comprises an adsorbent medium containing an analyte-receptor capable of retaining the analyte.The invention further relates to the use of said device for detecting the presence of an analyte in an interfering fraction containing a fluid or semi-fluid sample under investigation and to a method for detecting the presence of an analyte in an interfering fraction containing a fluid or semi-fluid sample.
Abstract:
Refere-se o presente pedido de patente de Invenção a um sistema de extração em fase sólida contendo sensor de nível que permite detectar a presença e o nível de líquido (solventes e amostras) no interior do cartucho, determinar a vazão empregada para a eluição do líquido e também detectar se o líquido foi completamente eluido do cartucho. Esse dispositivo apresenta chaves opteletrônicas transmissivas que são acopladas aos cartuchos de extração para que o sinal lógico proveniente desse dispositivo seja utilizado por um circuito eletrônico para a automação das diversas etapas de extração em fase sólida.
Abstract:
A chemical detector for rapid, simultaneous detection of multiple chemicals including chemical warfare agents, toxic industrial chemicals, and explosives having one or more gas chromatography columns each with a chemosorbent or a chemo-reactive stationary phase and an infrared-transparent base, a bright infrared light source, a mechanism to direct the light source to any point along any of the columns, and an infrared sensor. Another disclosed detector has one or more gas chromatography columns each on the surface of a substrate having at least one infrared-transparent waveguide pattern, a bright infrared light source, and at least one ring resonator for each column, where each ring resonator is coated with a chemosorbent or a chemo-reactive stationary phase, and where each ring resonator spectroscopically probes the stationary phase. Also disclosed are the related methods for chemical detection.
Abstract:
Devices and methods for separating and detecting analytes in a sample. The separation can be accomplished utilizing capillary electrophoresis (CE) or high-performance liquid chromatography (HPLC). The detection can be accomplished by surface enhanced Raman scattering.
Abstract:
L'invention concerne un procédé de détermination des fractions volumiques respectives d'hydrocarbures saturés, oléfiniques et aromatiques dans un échantillon d'un produit pétrolier liquide distillant en dessous de 315 °C, dans les conditions opératoires définies dans la norme ASTM D 1319-03, lequel procédé se distingue du procédé normalisé par le fait que le relevé des résultats d'analyse et l'exploitation de ceux-ci se fait non pas par un opérateur humain, mais au moyen d'un système d'acquisition et de traitement d'images numériques comprenant au moins une caméra numérique à dispositif à transfert de charge (CCD) et un ordinateur avec un programme informatique de traitement des images numériques enregistrées.
Abstract translation:本发明涉及一种确定在ASTM D 1319-03标准中规定的操作条件下在低于315℃蒸馏的液体石油产品样品中的饱和的烯烃和芳族烃的体积分数的方法。 所述方法与归一化方法不同,因为分析结果的读取及其使用不由人类操作者进行,而是通过用于获取和处理数字图像的系统,该系统包括至少一个具有电荷耦合的数字照相机 设备(CCD)和具有用于处理所记录的数字图像的计算机程序的计算机。