| CAS Number | 3149-28-8 |
|---|---|
| Molecular Formula | C5H6N2O |
| Molecular Weight | 110.116 |
| InChI Key | WKSXRWSOSLGSTN-UHFFFAOYSA-N |
| LogP | 0.73 |
| Synonyms |
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Applications:
HPLC Method for Analysis of 2-Methoxypyrazine on Primesep 100 Column by SIELC Technologies
October 18, 2022
High Performance Liquid Chromatography (HPLC) Method for Analysis of 2-Methoxypyrazine on Primesep 100 by SIELC Technologies.
Methoxypyrazines are an important class of odorous, flavored compounds that can greatly affect the taste of wines. In particular with respect to white wines, they are highly associated with vegetal and herbaceous aromas and flavors; these are often referred to as green characteristics of the wine. Thus winemakers tend to try to minimize the Methoxypyrazine content in their wines; this can be done through extractment, exposure to oak barrels (or oak chips), or minimizing the amount of grape skins and and stems in the production process.
2-Methoxypyrazine can be retained and analyzed on a Primesep 100 mixed-mode stationary phase column using an isocratic analytical method with a simple isocratic mobile phase of water, Acetonitrile (MeCN), and a sulfuric acid (H2SO4) buffer. This analysis method can be UV detected at 200 nm with high resolution and peak symmetry.
Condition
| Column | Primesep 100, 4.6 x 150 mm, 5 µm, 100 A, dual ended |
| Mobile Phase | MeCN/H2O – 20/80% |
| Buffer | H3PO4 – 0.2% |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 200 nm |
| Peak Retention Time | 3.92 min |
Description
| Class of Compounds | Pyrazines |
| Analyzing Compounds | 2-Methoxypyrazine] |
Application Column
Primesep 100
Column Diameter: 4.6 mm
Column Length: 150 mm
Particle Size: 5 µm
Pore Size: 100 A
Column options: dual ended
Separation of 2-Methoxypyrazine on Newcrom R1 HPLC column
February 16, 2018
2-Methoxypyrazine can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.
Application Column
Newcrom R1
The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.
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