HPLC Method for Analysis of Isophthalic acid on Primesep B Column

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Chromatogram

Description

· Separation type: Liquid Chromatography Mixed-mode SIELC Technologies · HPLC Method for Analysis of Isophthalic acid on Primesep B Column

Isophthalic acid is an aromatic dicarboxylic acid with the chemical formula C₆H₄(CO₂H)₂. It is a colorless crystalline solid and is one of the three isomers of benzene dicarboxylic acid, the others being phthalic acid and terephthalic acid. In isophthalic acid, the two carboxyl groups (−COOH) are positioned on the 1st and 3rd carbons of the benzene ring, making it a meta isomer.

Uses:

Isophthalic acid can be retained, separated and analyzed using a Primesep B mixed-mode stationary phase column. The analysis employs a gradient method with a simple mobile phase comprising water, acetonitrile (MeCN), and phosphoric acid as a buffer. This method allows for detection using UV 210 nm.

You can find detailed UV spectra of Isophthalic acid and information about its various lambda maxima by visiting the following link .

Method Parameters

Mobile PhaseGradient MeCN – 30-70%, 10 min
BufferH3PO4 – 0.4%
Flow Rate1.0 ml/min
DetectionUV 210 nm
Limit of Detection5 ppb
Class of CompoundsAcid
Analyzing CompoundsIsophthalic acid

HPLC Column Used

Primesep B, 4.6 x 150 mm, 5 µm, 100 A, dual ended