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Compound: Succinic Acid
Separation of Diacid: Ion Exclusion mode |
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Application Notes: Primesep 100 separates a mixture of dicarboxylic acids in ion-exclusion mode with a mobile phase of water, acetonitrile (MeCN, ACN), and sulfuric acid (H2SO4) with UV detection at 210 nm. Baseline resolution of fumaric, maleic, malic, and succinic acids is obtained in less than 8 minutes. The separation combines ion-exclusion and reversed-phase mechanisms in one method. Application Analytes: Application Detection: |
Separation of Diacid Hydrophobic and Ion Exclusion Modes |
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Application Notes: Primesep 200 retains and separates the organic diacids (malic, succinic, fumaric, and maleic) by a combination hydrophobic, reversed-phase interactions and ion exclusion. The separation uses a mobile phase of water, acetonitrile (MeCN, ACN) and trifluoracetic acid (TFA) with UV detection at 210 nm. Application Analytes: Application Detection: |
HPLC Separation of Organic Acids in HILIC Mode on Primesep N Column |
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Application Notes: Ascorbic, methylmalonic and succinic are weak organic acids. Retention of these three acids is achieved on Primesep N column in HILIC mode using acetonitrile/water and ammonium acetate. Compounds are monitored by ELSD. Method can be used for determination of ascorbic acid (Vitamin C), methylmalonic acid and succinic acid in various matrices. Other polar organic acids can be analyzed on this HILIC column. Application Analytes: Application Detection: |
HPLC Separation of Succinic and Methylmalonic Acids |
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HPLC Application for Analysis of Sodium Succinate on Primesep 100 |
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Application Notes: Succinic acid is a dicarboxylic acid that plays important role in citric acid cycle. Succinic acid is byproduct of sugar fermentation, and is present in wines and beer. In one of the forms it exists as a salt with sodium. Both sodium and succinic acid can be retained and separated on Primesep 100 column. Sodium is retained by cation-exchange mechanism, while succinic acid is separated by reverse phase mechanism. Method can be used for HPLC analysis of metal ions (sodium, potassium, lithium, calcium, etc) and carboxylic acids (hydrophobic carboxylic mono and diacids) in one chromatographic run. ELSD is detection of choice for non-UV active non-volatile compounds. Application Analytes: Application Detection: |
Effect of both pH and Organic Content on a Separation of Sugars, Amino Acids, and Carboxylic Acids |
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HILIC Separation of Carboxylic Acids |
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Application Notes: Hydrophilic acids are separated on Obelisc N mixed-mode HILIC column. Seven carboxylic acids are separated based on their polarity and pKa values. Changes in ionization states of acids and stationary phase can be used to control elution order of organic and inorganic acids. Application Analytes: Application Detection: |
HPLC Analysis of Basic Drugs and Acidic Counter-Ions by Mixed-Mode Chromatography |
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Application Notes: Majority of the drugs in pharmaceutical industries are administered in a salt form. The presence of two counter-ions very often requires two methods. The nature of these counterparts in drugs can be: inorganic cation and organic acid, inorganic anion and organic base, and organic cation and organic anion. Based on the property of molecules the stoichiometry can be different also. The task of simultaneous quantitation of counter-ions can be achieved by using mixed-mode columns. The general approach for analysis is based on properties of corresponding counter-ions. Hydrophobic basic drugs, like dextromethorphan, verapamil, trimipramine, and corresponding acidic counter-ions (chloride, chlorate, bromide, bromate, perchlorate, maleate, fumarate,tartrate, succinate, phosphate, citrate, benzosulfonate, toleuensulfonate) can be separated and quantitated in the same run on reversed-phase anion-exchange column. Basic hydrophobic drugs are retained by reversed-phase mechanism, and counter-ion are retained by reversed-phase and anion-exchange mechanism. Some polar counter-ions are retained only by anion-exchange mechanism. Retention time and selectivity of HPLC separation of drugs and counter-ions can be achieved by changing amount of acetonitrile and amount of ions in the mobile phase. Detection technique depends on the properties of counter-ions. In case of low or no UV activity, ELSD can be employed if counter-ion forms non-volatile salt wit mobile phase additive (ammonium formate). This HPLC method can be used for simultaneous quantitation of other basic drugs and counter-ions. Presence of two mechanisms of retention allows to control retention times of drug and counter-ion independently, and even change order of elution when necessary. Application Analytes:
Application Detection: |
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Copyright © SIELC Technologies. 2002-2010
Copyright © SIELC Technologies. 2002-2010