Dionex Demonstrates Simplified Determination of 2-Ethylhexanoic Acid in Clavulanate
Dionex announced a simplified method for the detection and quantification of 2-ethylhexanoic acid, a potential impurity in potassium clavulanate active pharmaceutical ingredient (API) incorporated during sample purification. Application Note 262: Determination of 2-Ethylhexanoic Acid Impurity in Clavulanate reports results for limit of detection/limit of quantification (LOQ/LOQ), linear calibration range, spike recovery, retention time precision, and peak area precision determinations that show this to be an accurate and reproducible technique to determine 2-ethylhexanoic acid in clavulanate below the 0.8% acceptance criteria.
The determination method outlined in Application Note 262 uses 150-fold lower concentration of the API and eliminates the need for solvent extraction per the current United States Pharmacopeia (USP) monograph, thus consuming less of the API and simplifying sample preparation.
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