Determination of preservatives in cosmetics and food samples by micellar liquid chromatography.

@article{Memon2005DeterminationOP,
  title={Determination of preservatives in cosmetics and food samples by micellar liquid chromatography.},
  author={Najma Memon and Muhammad Iqbal Bhanger and M Y Khuhawer},
  journal={Journal of separation science},
  year={2005},
  volume={28 7},
  pages={635-8}
}
An analytical procedure has been developed for the analysis of benzoic acid, p-hydroxybenzoic acid, methyl-, ethyl-, propyl-, isopropyl-, and butyl esters of p-hydroxybenzoic acid by micellar liquid chromatography. After dilution in n-propanol the sample was directly injected onto a Lichrosorb ODS, 5 microm (250 x 4.6 mm ID) column and eluted with aqueous 2% Brij-35 adjusted to pH 3.0 with phosphoric acid:propanol (80:20 v/v) at a flow rate of 1 mL min(-1) and UV detection at 254 nm. A linear… CONTINUE READING