Determination of impurities in flame retardant monomer 2-carboxyl ethyl(phenyl) phosphinic acid by ion chromotography.

In this paper, a method based on ion chromatography (IC) with conductivity detector was developed for the determination of impurities including phenyl phosphinic acid (BPA), phenyl phosphonic acid (PPOA) and crylic acid in flame retardant monomer 2-carboxyl ethyl(phenyl) phosphinic acid (CEPPA). Under favorable chromatographic conditions, good linear relationship, sensitivity and reproducibility were obtained. Detection limits of BPA, PPOA and crylic acid were 1.5, 0.5, 0.4μgl−1, respectively. Relative standard deviations (RSD) of repeated analyses were less than 2.22% (n=10). The real samples (white crystal) have been tested and rate of recovery were 89–108%. It was confirmed that this method could be used in the analysis of flame retardant monomers.