| CAS Number | 70-47-3 |
|---|---|
| Molecular Formula | C4H8N2O3 |
| Molecular Weight | 132.119 g/mol |
| InChI Key | DCXYFEDJOCDNAF-REOHCLBHSA-N |
| LogP | -3.82 |
| Synonyms |
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Applications:
HPLC Analysis of Active Drug and Amino Acids in a Formulation
Polar amino acids are very often used as components of vitamin and supplement composition. Analysis of such complex composition is a challenging task. In this application, 5 amino acids (asparagine, glutamic acid, proline and arginine) and two preservatives (methyl paraben and propyl paraben) are separated on a Primesep 100 reversed-phase cation-exchange column with LC/MS compatible mobile phase. Method does not require ion-pairing reagent in the mobile phase. Compounds are monitored by ELSD and UV. Method is validated for quantitation of underivatized amino acids in complex mixtures. The method is simple and robust and can be used for analysis of various vitamin formulations.
Application Analytes:
Arginine
Asparagine
Ethyl Paraben
Glutamic Acid
Lysine
Methylparaben
Proline
HPLC Separation of Aspartic Acid and Asparagine on Obelisc R Column
Two amino acids, aspartic acid and asparagine, are separated on an Obelisc R column by combination of reverse-phase and ion-exchange mechanism. Method can be used for analysis of these and other underivatized amino acids by HPLC with UV, ELSD, CAD and LC/MS detection.
Application Analytes:
Asparagine
Aspartic Acid
HPLC Separation of Lysine and Arginine from Other Amino Acids
Application Notes: Amino acids are polar ionic compounds which are not retained on reversed-phase column without ion-pairing reagent. In our application, lysine and arginine can be separated from other amino acids. Amino acids with a pH between 3 and 5 and with one basic and one acidic group become very polar. Therefore these amino acids don’t have strong ion-exchange interaction with Primesep C stationary phase. Amino acids with two amino groups still carry positive net charge and can interact with stationary phase by cations-exchange mechanism. pH variation of the mobile phase can be an effective tool to adjust selectivity of separation for zwitter-ionic, basic and acidic compounds. This method can be used for separation of mono-charged compounds from compounds having an extra charge.
Application Columns: Primesep C
Application compounds: Aspartic acid, Glutamic acid, Aspargine, Glycine, Proline, Alanine, Phenylalanine, Tyrosine, Leucine, Lysine, Arginine
Detection technique: UV, LC/MS, ELSD/CAD
Application Analytes:
Alanine
Arginine
Asparagine
Aspartic Acid
Glutamic Acid
Glycine
Leucine
Lysine
Phenylalanine
Proline
Tyrosine
HPLC Separation of Mixture of 12 Amino Acids on Primesep 100 Column
| Column | Primesep 100, 4.6x250 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O - 35/65% |
| Buffer | H2SO4 0.05% 12 min hold, gradient 0.05-0.20, 13 min |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 200 nm |
| Class of Compounds | Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Amino acid |
| Analyzing Compounds | Amino acids |
Application Analytes:
Amino Acids
Arginine
Asparagine
Cysteine
D-Isoleucine
D-Leucine
D-Valine
DL-Isoleucine
Histidine
Isoleucine
L-Cysteine
L-Methionine
Leucine
Methionine
Phenylalanine
Proline
Tryptophan
Valine