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Analysis of isopropyl para‐toluenesulphonate in palm‐based esters by gas chromatography with flame ionization detection and confirmed with mass spectrometry
Author(s) -
Tay B. Y. P.
Publication year - 2013
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/ics.12004
Subject(s) - chromatography , chemistry , gas chromatography , mass spectrometry , isopropyl , flame ionization detector , relative standard deviation , isopropyl myristate , isopropyl alcohol , calibration , gas chromatography–mass spectrometry , analytical chemistry (journal) , detection limit , mathematics , organic chemistry , statistics
Synopsis A simple and rapid gas chromatography ( GC ) method with flame ionization detector was developed for detection of isopropyl para‐toluenesulphonate ( IPTS ) in palm‐based isopropyl palmitate ( IPP ) and isopropyl myristate ( IPM ). The method involved spiking the IPP / IPM samples with IPTS and directly injecting the spiked samples into GC without undergoing clean‐up steps. The calibration curves for IPTS showed good linearity with coefficient correlation of 0.9999 for six‐point calibration from 0.5 to 50 μg mL −1 and 0.9996 for six‐point calibration from 0.5 to 200 μg mL −1 . IPTS recoveries from IPP were 98.6–103.5% with relative standard deviation ( RSD ) of 0.40–2.80%, whereas recoveries from IPM were 97.0–107.2% with RSD of 0.42–4.21%. The identity of IPTS recovered from the isopropyl esters was confirmed by a GC ‐mass spectrometer detector. The method was successfully applied to the analyses of IPTS in commercial samples. It was found that there were IPTS in the range of 34.8–1303.0 μg g −1 in the palm‐based esters for some of the samples analysed.