本研究通过响应面法(RSM)优化了Phlomis stewartii植物提取物的机械提取工艺，采用Box-Behnken设计(BBD)对转速(X1)、溶剂体积(X2)和提取时间(X3)进行参数优化，获得最高提取率(18.92%)和生物活性成分含量。通过HPLC和GC-MS鉴定出羟基苯甲酸、p-香豆酸等关键酚类化合物及噻唑 ...

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 ...

本综述系统回顾了四十年来稳定同位素稀释气相色谱-串联质谱（GC–MS/MS）在类二十烷酸（eicosanoids）临床定量分析中的应用 ...

High performance liquid chromatography, (HPLC) and Gas chromatography (GC) work by separating complex mixtures into individual compounds. In each process you need to separate in order to identify, ...

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 ...

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 ...

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 ...

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 ...