Extraction
Ready for Reliable, Economical Analysis |
Extraction is an important step in sample preparation prior to chromatography. It involves the isolation of target analytes from a complex sample, or much larger sample volume. The process removes interfering sample components that may block HPLC and GC columns. It also increases analyte concentration by a factor of 100 to 5,000, thereby significantly improving detection sensitivity. As part of selective and specific sample preparation, extraction helps ensure more reliable and economical chromatographic analysis.
Quality Throughout the Line
To help you meet these goals, Merck offers a complete portfolio of high-quality products for offline and online extraction. For conventional offline methods, the range includes EXtrelut® sorbents and columns for liquid-liquid extraction, as well as LiChrolut® sorbents and columns for solid-phase extraction. Our third line of products, LiChrospher® ADS, is designed for fast, LC-integrated online extraction.
Offline Versus Online Extraction
| Offline | Online | |
|---|---|---|
| Offline extraction is a conventional method with many application fields. A further selection for offline sample preparation can be made according to the extract. | Online extraction is a fully automated, LC-integrated method of sample preparation. | |
| Liquid-liquid extraction with EXtrelut® | Solid-phase extraction with LiChrolut® | Direct extraction with LiChrospher® ADS |
|
Provides emulsion-free extraction with high sample throughput, which helps save time and costs |
Offers a great variety of phases for extraction and enrichment of different samples (e.g. environmental pharmaceutical, food & beverage, etc.) for research and analysis |
Ensures safer handling of infectious samples, improves accuracy, and allows on-column enrichment of analytes, for greater speed and economy |
| Catalog Number | Catalog Name |
|---|---|
| 101515 | 二乙基二硫化脲銀 (Silver diethyldithiocarbamate) |
| 106146 | 甲基異丁酮 (Isobutyl methyl ketone) |
| 106689 | 二乙基二硫胺甲酸鈉 (Sodium diethyldithiocarbamate trihydrate) |
| 103092 | 雙硫腙 (Dithizone) |
| 107098 | 8-羥喹啉 (8-Hydroxyquinoline) |
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Related Resources
Merck offers an extensive range of services, information and tools to support you in your analysis. Use the links below to learn more.
Chromatography
Application Notes Finder
