| CAS Number | 56-40-6 |
|---|---|
| Molecular Formula | C2H5NO2 |
| Molecular Weight | 75.067 g/mol |
| InChI Key | DHMQDGOQFOQNFH-UHFFFAOYSA-N |
| LogP | -3.21 |
| Synonyms |
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Applications:
HPLC Separation of DMSO and Glycine by Mixed-Mode Chromatography
Dimethyl sulfoxide is important polar aprotic solvent, which is frequently used in pharmaceutical drug manufacturing, desolution, etc. DMSO is used as one of the solvents on protein chemistry due to universal ability to dissolve small molecules like amino acids. Amino acids and DMSO are very polar and have no retention on reversed-phase columns. In this HPLC application DMSO and glycine are separated on Primesep 100 mixed-mode column. DMSO is retained by weak reversed-phase mechanism and very low organic concentration is required in order to achieve any retention. Glycine, like any other underivatized amino acid, is retained by weak reversed-phase and moderate cation-exchange mechanism. Method uses acetonitrile/water/TFA gradient and UV detection.
| Column | Primesep 100, 4.6x150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O |
| Buffer | TFA |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 210 nm |
| Class of Compounds | Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Amino acid |
| Analyzing Compounds | DMSO, Glycine |
Application Analytes:
Amino Acids
DMSO (Dimethyl sulfoxide)
Glycine
HPLC Analysis of Polysorbate in Mixture with Amino Acids and Sugar
Polysorbates are a class of emulsifiers used in some pharmaceuticals and food preparation. They are often used in cosmetics to solubilize essential oils into water-based products. Polysorbates are oily liquids derived from PEG-ylated sorbitan (a derivative of sorbitol) esterified with fatty acids. Surfactants that are esters of plain (non-PEG-ylated) sorbitan with fatty acids are usually referred to by the name Span. It is often required to quantitate Polysorbate (Polysorbate/Tween 20, Polysorbate/Tween 40, Polysorbate 60/Tween 60 and Polysorbate 80) by HPLC in various formulations. Polysorbates exist in form of oligomers.
| Column | Primesep D, 3.2x50 mm, 5 µm, 100A |
| Mobile Phase | IPA |
| Buffer | Formic Acid |
| Flow Rate | 0.5 ml/min |
| Detection | ELSD |
| Class of Compounds | Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Amino acid |
| Analyzing Compounds | Glycine, Histidine, Sucrose, Polysorbate 20 |
Application Analytes:
Amino Acids
Glycine
Histidine
Polysorbate
Polysorbate 20
Polysorbate 80
Sucrose
Tween 20
Tween 80
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
| Column | Primesep C, 4.6x150 mm, 5 µm, 100A |
| Mobile Phase | MeCN - 15% |
| Buffer | AmAc pH 5.0- 15 mM |
| Flow Rate | 1.0 ml/min |
| Detection | ELSD |
| Class of Compounds | Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements |
| Analyzing Compounds | Aspartic acid, Glutamic acid, Aspargine, Glycine, Proline, Alanine, Phenylalanine, Tyrosine, Leucine, Lysine, Arginine |
Application Analytes:
Alanine
Arginine
Asparagine
Aspartic Acid
Glutamic Acid
Glycine
Leucine
Lysine
Phenylalanine
Proline
Tyrosine
HPLC Method for Analysis of Glycine Methyl Ester Hydrochloride
| Column | Primesep 100, 4.6x150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O - 5/95% |
| Buffer | H2SO4 - 0.5% |
| Flow Rate | 1 ml/min |
| Detection | UV, 200 nm |
| Class of Compounds | Amino acid, Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Zwitterionic |
| Analyzing Compounds | Glycine, Glycine Methyl Ester |
Application Analytes:
Glycine
Glycine methyl ester
HPLC Method for Analysis of Glycine Methyl Ester Hydrochloride
| Column | Primesep A, 3.2x150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O - 10/90% |
| Buffer | H2SO4 - 0.05% |
| Flow Rate | 0.05 ml/min |
| Detection | UV, 200 nm |
| Class of Compounds | Amino acid, Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Zwitterionic |
| Analyzing Compounds | Glycine, Glycine Methyl Ester |
Application Analytes:
Glycine
Glycine methyl ester
HPLC Separation of Mixture of Conditionally Essential 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 | Glutamin (Gln/Q), L-Glycine (Gly/G), L-Cysteine (Cys/C), L-Proline Pro/p), L-Tyrosine (Tyr/Y), L-Arginine (Arg/R) |
Application Analytes:
Amino Acids
Arginine
Cysteine
Glycine
L-Cysteine
L-Glutamine
Proline
Tyrosine
New HPLC Amino Acids Separation Compatible With Carbon Dating Technique
Hydroxyproline seems to be the most promising amino acid used in carbon dating when isolated from bone collagen. Separation of amino acids is challenging, especially without the use of ions or inorganic buffers that can interfere with Mass spectrometer (MS) or contaminate the sample with modern carbon. Amino acids are also not retained in reverse-phase chromatography. The ideal solution would be using water only to separate the amino acids. This would allow a direct coupling to MS. We were able to separate hydroxyproline from proline and other simple amino acids like glycine and alanine in HPLC on Newcrom AH column using water only as a mobile phase. Using water also allowed UV detection at 205 nm which can’t be done if using a buffer based on acetic or formic acid. See more information on radiocarbon dating here. The same method can be modified to get symmetrical peaks and higher efficiency if a mobile phase with ionic modifier such as formic acid is used.
| Column | Newcrom AH, 4.6x150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 205 nm, CAD |
| Class of Compounds | Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements, Amino acid |
| Analyzing Compounds | Alanine, Glycine, Proline, Hydroxyproline |
Application Analytes:
Alanine
D-Alanine
Glycine
Hydroxyproline
Proline