Compound: Naphthoic Acid

Separation of Diacid Hydrophobic and Ion Exchange Modes

Application Notes:

Primesep B combines a hydrophobic, reversed-phase mechanism with ion exchange to separate the diacids, fumaric, benzoic, phthalic, naphthoic, and maleic acids. Changing the acetonitrile content of the mobile phase reverses the peak order for naphthoic and maleic acids. Primesep B combines reversed-phase and anion-exchange mechanism with a mobile phase of water, acetonitrile (MeCN, ACN) and trifluoracetic acid (TFA) and UV detection at 250 nm.

Application Columns:

Primesep^® B is a mixed-mode HPLC column with general hydrophobic and ion-exchange properties. The Primesep B stationary phase combines a hydrophobic chain and a strongly basic functional group as an anion exchanger recommended for mobile phase pH's of 1.5 to 4. Primesep B separates bases by an ion-exclusion mechanism. The basic functional group acts as an embedded ion-pairing reagent. Recommended buffers for Primesep columns are trifluoroacetic acid (TFA), phosphoric acid (H3PO4), perchloric acid (HClO4), and formic acid. Methods can be developed on Primesep columns that are fully compatible with detectors such as UV, RI, conductivity, fluorescence, evaporative light scattering (ELSD) as well as mass spectrometers (LC/MS) and preparative chromatography (prep HPLC) systems.

Application Analytes:

Application Detection:

HPLC Separation of Organics Acids

Application Notes:

Primesep D separates organic acids such as fumaric, benzoic, phthalic, naphthoic, and maleic acids by a mixture of anion exchange and reversed phase. Retention times and elution order can be changed by adjusting the percentage of acetonitrile in the mobile. This can not be done by traditional ion-exchange and ion-exclusion chromatography. The HPLC separation uses a mobile phase of water, acetonitrile (MeCN, ACN) and trifluoroacetic acid (TFA) and UV detection at 250 nm.

Application Columns:

Primesep^® D is a reversed-phase HPLC column with general hydrophobic and ion-exchange properties for direct injection of plasma samples. The Primesep D stationary phase combines a hydrophobic chain and a basic functional group as an anion exchanger. Primesep D excludes high molecular weight plasma compounds while retaining hydrophobic and acidic small molecules. Methods can be developed on Primesep columns that are fully compatible with detectors such as UV, RI, conductivity, fluorescence, evaporative light scattering (ELSD) as well as mass spectrometers (LC/MS) and preparative chromatography (prep HPLC) systems.

Application Analytes:

Application Detection:

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