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Determination of monocyclic aromatic amines using headspace solid‐phase microextraction based on sol–gel technique prior to GC
Author(s) -
SarafrazYazdi Ali,
Ardaki Masoomeh Sayyar,
Amiri Amirhassan
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200940
Subject(s) - solid phase microextraction , chromatography , chemistry , gas chromatography , phase (matter) , gas chromatography–mass spectrometry , organic chemistry , mass spectrometry
In this research, the headspace solid‐phase microextraction ( SPME ) coupled with GC flame ionization detector was applied for the determination of some monocyclic aromatic amines in real water and urine samples. A sol–gel technique was applied for the preparation of the SPME fibers. Two different sol–gel coatings, ( PEG and poly(ethylene glycol) modified with multi‐walled carbon nanotubes [PEG/CNTs]), were prepared and compared. Extraction efficiency of PEG / CNT s was better than PEG fiber in the same conditions. To obtain maximum extraction efficiency, some parameters such as desorption temperature and time, temperature and time of extraction, salt effect, pH, and stirring speed were investigated and optimized for PEG / CNT s fiber. Under optimized conditions, the LOD s ( S / N = 3) were in the range of 0.5–50 ng/L and limits of quantification ( S / N = 10) were between 1 and 500 ng/L. Repeatability ( n = 5) was in the range of 3.2–9.1% and reproducibility ( n = 3) was obtained from 5.5 to 12.0%. The method was successfully applied to the analysis of real water and urine samples with recoveries from 63.7 to 97.0%.