Premium
Quantitative determination of 16 polycyclic aromatic hydrocarbons in soil samples using solid‐phase microextraction
Author(s) -
Wang Yonghua,
Zhang Juan,
Ding Youchao,
Zhou Jia,
Ni Lixiao,
Sun Cheng
Publication year - 2009
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.200900420
Subject(s) - solid phase microextraction , repeatability , extraction (chemistry) , detection limit , chromatography , sample preparation , fiber , solid phase extraction , correlation coefficient , contamination , soil test , chemistry , analytical chemistry (journal) , materials science , gas chromatography–mass spectrometry , soil water , environmental science , mass spectrometry , mathematics , biology , ecology , statistics , organic chemistry , soil science
A method for the determination of polycyclic aromatic hydrocarbons (PAHs) in soil samples using ultrasonic‐assisted extraction with internal surrogates combined with solid‐phase microextraction and GC‐MS has been developed. Five kinds of commercial solid‐phase microextraction fibers, 100 μm PDMS, 30 μm PDMS, 65 μm PDMS/DVB, 50 μm DVB/CAR/PDMS and 85 μm PA, were compared to choose the optimal SPME fiber for extraction of PAHs. One hundred micrometers of PDMS fiber was found to be more suitable for the determination of PAHs due to its wider linear range, better repeatability, lower detection and more satisfactory efficacy than the other fibers. Under the recommended conditions, 100 μm PDMS fiber could provide low nanogram level detection limits with correlation coefficient greater than 0.98. The method was also applied to determine PAHs in a spiked soil sample, obtaining recoveries higher than 79.3%. A field study with naturally contaminated samples from local contaminated sites was carried out. The proposed method was found to be a reliable, inexpensive and simple preparation method for quantitative determination of 16 PAHs in soil samples.