EXPEC 5250 型气相 / 液相 - 三重四极杆质谱联用仪是集成EI和ESI双离子源于一体的自动切换质谱系统，在同一台三重四极杆串联质谱仪上同时联接气相色谱和液相色谱，实现两种分析模式的自动快速切换，在一台质谱仪上实现了 GC- MS/ MS 和 LC- MS/ MS 两种工作模式 ...

本综述系统评述了塑料热解油中烯烃定量的前沿分析方法，涵盖了滴定法（溴值、碘值）、光谱技术（FTIR、NMR）、色谱方法（GC、GC×GC、HPLC）及选择性策略（银离子络合、化学衍生化等）。重点指出标准化方法的局限性，并强调先进技术（如GC×GC-VUV和软电离 ...

In 1964, University of Utah Chemistry Professor J. Calvin Giddings enunciated a theoretical platform that would provide liquid chromatography (LC) with resolving power equivalent to that of gas ...

本研究针对菲律宾石梓(Gmelina philippensis)活性成分不明的问题，通过GC-MS和HPLC-ESI-MS/MS分析其树皮提取物，发现多种活性化合物 ...

The demand for skilled laboratory professionals continues to grow, and chromatography techniques remain dominant tools in nearly every industry. Whether performing a straightforward environmental Gas ...

Traditional soda lime silica (SLS) glass bottles have long been the industry standard for the packaging of solvents; however, they may introduce unwanted ions such as Na+, K+, Ca++ and Fe+++ over time ...

Chromatography is a proven method used to separate complex samples into their constituents, and it is undisputedly the most important procedure for isolating and purifying chemicals. It is classified ...

Metabolomics — the comprehensive study of metabolic reactions — is gaining ground alongside its older siblings genomics and proteomics. “Unlike some of the other 'omics' that we have seen, ...

With the USP formally implementing a series of test method updates to USP 661.1 and USP 661.2 effective December 1 st 2025 it is imperative that the CS Analytical Team be prepared to help our client ...

Top articles include a new “GC Connections” article on maintenance practices for modern capillary gas chromatography (GC) systems, an interview on rapid per- and polyfluoralkyl substances (PFAS) ...