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相关概念视频

High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Gas Chromatography: Sample Injection Systems01:08

Gas Chromatography: Sample Injection Systems

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In gas chromatography, the sample is introduced as a vapor plug into the carrier gas stream for high efficiency and resolution. A microsyringe injects the sample solution into a heated sample port, vaporizing it and mixing it with the carrier gas. This process is important to ensure the sample is properly prepared for analysis. Thermally sensitive samples can be injected directly into the column and volatilized by slowly increasing the column temperature.
Two primary injection methods are used...
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High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

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High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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Principles Of Column Chromatography01:13

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The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
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Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
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OpenPrep:是传感器事件驱动的开放列染色学样本准备系统.

Jong Kwang Lee1, Hong-Joo Ahn2, Tae-Hyeong Kim3

  • 1Advanced Fuel Cycle Technology Division, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989, Yuseong-gu, Daejeon 34057, Republic of Korea.

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概括
此摘要是机器生成的。

OpenPrep是一个新的传感器驱动的色谱系统,可以消除门问题和交叉污染. 这种创新系统为复杂的样本准备提供了精确的控制和灵活性,包括放射性废物分析.

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科学领域:

  • 分析化学 分析化学
  • 染色图学技术 染色图学技术
  • 自动化样品准备自动化样品准备

背景情况:

  • 传统的驱动色谱系统经常因流量选择而遭受过载和堵塞.
  • 尽量减少样品消耗,化剂损失和废物产生是染色样品制备中的关键挑战.
  • 确保试剂输送和移动相流量控制的准确性和可重复性对于可靠的分析结果至关重要.

研究的目的:

  • 介绍OpenPrep,一个传感器事件驱动的,开放列色谱样本准备系统.
  • 通过消除有问题的流量选择器和减少死体积来解决传统系统的局限性.
  • 为了证明系统在分析多样化和具有挑战性的样本方面具有精确控制,灵活性和效率的能力.

主要方法:

  • 开发一个无门柱流量设计,使用无接触内置传感器进行流量控制.
  • 集成一个紧的门架配送器和基于运动阶段的分数采集器.
  • 实施在线校准算法,用于自动移动相流速调节.
  • 使用从单个样本中分离Re,Sr,Fe和Ni的多阶段顺序分离的概念验证演示.

主要成果:

  • 消除了与驱动系统固有的携带和堵塞问题.
  • 与活塞操作的管管相比,实现了更高的试剂输送准确度和精度.
  • 在加速流速下,证明了Re,Sr和Ni的优异化学产量 (83-97%),相对标准偏差低 (<2.6%).
  • 展示了对放射性废物等复杂样品矩阵的增强灵活性,可重构性和运行效率.

结论:

  • OpenPrep提供了一种优越的替代传统动态流系统,通过尽量减少样品消耗,化剂损失和浪费.
  • 传感器驱动的方法确保精确控制化物收集和移动相流量,满足准确性和可重复性的要求.
  • 该系统的开放架构和已证明的性能使其非常适合分析具有挑战性的样品,包括放射性废物,以提高效率和成本效益.