克服在液体染色学中的可持续性测量挑战的强样品溶剂效应. 比斯醇-A的例子
Hannes Georg Graf1, Thomas Ortmann1, Peilin Yang2
1Agilent Technologies Deutschland GmbH, Hewlett-Packard-Str. 8, Waldbronn 76337, Germany.
Analytical chemistry
|October 8, 2024
概括
这项研究引入了一种用于超高性能液体染色体的新型料注射 (FI) 技术,可以在10亿分之一 (ppb) 级别检测微量分析物. 这种方法显著改善了二甲中具有挑战性的样品的检测极限.
科学领域:
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
背景情况:
- 逆相超高性能液态色谱 (RP-UHPLC) 面临的挑战是使用强注射溶剂,如二甲 (DCM).
- 经典的DCM在水性移动相中的流通注入导致分离不良和峰值分裂.
- 达到低零件/亿 (ppb) 检测极限对于痕迹分析至关重要.
研究的目的:
- 使用RP-UHPLC开发一种可靠的方法,用于在DCM中检测低ppb水平的分析物.
- 为了克服色谱分离中强溶剂效应的局限性.
- 为了证明料注射 (FI) 的疗效,用于痕迹分析.
主要方法:
- 使用反向相位超高性能液态染色学 (RP-UHPLC) 与核心外静止相.
- 采用了一种新型的大容量料注射 (FI) 技术,注入45μL的DCM溶液.
- 优化料速度和同位素保持时间,以分离双A及其衍生物.
主要成果:
- 与标准注射相比,料注射 (FI) 在检测极限 (LOD) 中实现了超过20倍的改进.
- 尽管使用了大量强溶剂 (DCM),但仍然保持了出色的峰值分辨率.
- 建立了一种方法,在聚合物树脂中分析物质的LOD范围为1到10ppb.
结论:
- 料注射 (FI) 是一种高效的技术,用于在具有强烈溶剂效应的具有挑战性的矩阵中进行微量分析.
- 这种方法在各种分析应用中为提高灵敏度提供了巨大的潜力.
- 开发的方法提供了一种可靠的方法来量化聚合物树脂中的微量污染物.
相关概念视频
High-Performance Liquid Chromatography: Introduction
1.6K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
In HPLC, two phases play a critical role in the separation process:
1.6K
High-Performance Liquid Chromatography: Elution Process
435
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...
435
High-Performance Liquid Chromatography: Instrumentation
1.4K
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.
1.4K
Supercritical Fluid Chromatography
212
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
SFC utilizes a supercritical fluid mobile phase,...
212


