氣相色谱柱、配件和吸附劑
氣相色譜法 (GC) 是一種色譜技術，使用惰性載氣（流動相）快速分離揮發性化合物。流動相驅動氣態化合物通過加熱的色譜柱，色譜柱上塗有固體或液體固定相。汽化化合物的化學和物理特性差異以及它們與固定相之間的相互作用是分離過程的基礎。
Packed GC Columns
相關資源
- SupraSolv® GC 溶劑規格
我們的 GC 溶劑已針對 ECD、FID 和 MS 檢測或頂空氣相色譜法進行了專門開發和測試，以確保分析結果準確、可靠且可重複。
- Brochure: GC Workflow
We provide a comprehensive range of high quality tools for each step of the GC workflow ensuring accuracy, precision and consistency of your analysis.
- GC Columns Selection Guide
An optimized chromatographic separation begins with the column. The selection of the proper capillary column for any application should be based on four significant factors: stationary phase, column I.D., film thickness, and column length.
- Brochure: GC Solvents
As the world’s leading supplier of high-purity solvents, we offer a full range of products for every gas chromatography application in the laboratory - including highly sensitive pesticide and dioxin analyses.
- Brochure: GC Accessories
Choosing the proper items for routine system maintenance and new column installation can save costly downtime and rework, plus help prevent inaccurate chromatographic results.
- Guide: Environmental & Agricultural GC Columns Selection Guide
We have developed the most extensive line of special purpose columns designed for industry specific applications. These columns are manufactured to deliver high resolution, great analyte response, low bleed, and long column life to achieve the analytical performance you require.
- Flyer: Determination of Benzene in Reformulated Gasoline
The amount of benzene in gasoline is a concern because it is a known human carcinogen, and exposure to it has been linked to detrimental health effects.
- Application Note: GC-FID Method with Nitrogen as Carrier Gas for Simple-Routine Analysis of Essential Oils
The research examines nitrogen (N2) as an alternative to helium for GC-FID analysis of bergamot essential oil. By increasing nitrogen's velocity to 20 cm/s, analysis times comparable to helium were achieved, successfully quantifying 67 terpenes in 47 minutes with an optimized peak attribution model.
- Application Note: Hydrogen as Carrier Gas: A Reliable GC-MS Method for the Qualitative Analysis of Essential Oils
This research is focused on the development of a gas chromatography-mass spectrometry (GC-MS) method for the analysis of essential oils by using hydrogen (H2) as carrier gas.
GC色譜柱
要改善色譜分離效果，首先要選擇適當的色譜柱。在 GC 中，有兩種色譜柱可供選擇：毛細管色譜柱和填料色譜柱。
填料 GC 色譜柱
封裝 GC 色譜柱由不鏽鋼、PTFE 或玻璃管組成，管內填充填料（固定相）。填料柱可處理較大量的樣品，且不易受污染。玻璃柱用於惰性要求較高的應用，金屬柱用於要求較低的應用，而 PTFE 柱則是低溫應用的首選。
毛細管 GC 柱
毛細管 GC 色譜柱最適合高靈敏度的檢測。毛細管色谱柱由一條纖細的熔融石英玻璃管組成，其中的固定相經化學接合或塗佈在色谱柱內表面。
非極性氣相色譜柱最適合分析非極性化合物（如烷類）。Equity®-1、Petrocol®、SPB®-1、SPB®-Octyl、SLB®-5ms 是分離非極性化合物的強力推薦產品。極性氣相色譜柱在分離極性分析物方面效率最高。SPB®-624, OVI-G43, SPB®- 20, Equity®-1701, SPB®-35 SPB®-50, SPB
高極性色譜柱包括那些含有較高比例氰丙基官能基的固定相。這些固定相呈現出多種交互作用，適合分離可極化的化合物。可極化化合物是指含有 C 和 H，但有一個或多個 C=C 或 C≡C 鍵的化合物。高極性毛細管柱包括 SP®-2330, SP®-2331, SP®-2380、SP®-2560、SP®-2340、TCEP、SLB®-IL111i。
氣相色譜配件
適用於常見 GC 儀器的 GC 配件包括 GC 隔膜、入口襯墊、入口密封件、卡套、螺帽、護柱、連接器、流量計、手工工具、注射器、小瓶和光電離偵測器 (PID) 燈管。
氣體淨化與氣體管理
氣體輸送系統必須根據其預期用途，以適當的壓力提供高純度的流動相氣體。我們提供淨化和管理氣體流 (He、H、N、Ar) 的產品，包括淨化器、管道和調節產品，以及氣體產生器和空氣壓縮機。
Carbosieve®, Graphsphere™、Carbopack™）和幾種常用的分子篩和多孔聚合物吸附劑，用於 GC 分析。我們的碳吸附劑的主要特點包括
- 堅硬且不易碎裂
- 高多孔性
- 具有疏水性，因此適用於潮濕環境
- 適用於分析物尺寸相對於 C2-C5 n-alkanes 的分子
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