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1.
Gas chromatography-mass spectrometry-ion trap determination of
polycyclic aromatic hydrocarbons in waste oils
Anil
Narayanrao Mahindrakar*1†, Subhash Chandra*2,
L.P. Shinde*3
*1 New Custom House Laboratory, Ballard Estate, Mumbai - 400
001, Maharashtra State, India,
*2 Custom House Laboratory, Vasco-Da-Gama - 403 803, Goa,
India,
3 N.E.S. Science College, Nanded - 431 605, Maharashtra
State, India.
Corresponding author. Tele. : +91-9702502531; Fax: 022-2610205.
E-mail address:
aaanil01@gmail.com.
Abstract.
A gas chromatographic (GC) method with mass spectrometry
detection (MS) for the determination of sixteen polycyclic
aromatic hydrocarbons (PAHs) in waste oils has been
developed. The optimized procedure consisted of solvent
extraction followed by solid phase extraction for cleaning
to separate the fraction containing PAHs in waste oils and
injected into a capillary gas chromatographic system and
detected by mass spectrometry using selective ion monitoring
(SIM) mode. Solid phase extraction system using alumina and
silica were studied for the sample clean up and found a
better recovery in alumina. Extraction efficiency was
monitored by using pyrene-d10 as surrogate standard.
Phenanthrene-d10 was used as an internal standard for the
calibration. The average concentration of total PAH in all
waste oil samples was 1462.34 mg kg-1. The
concentration of PAH decreased in the order phenanthrene >
fluorene > pyrene > acenaphthene. The average percentage of
total PAH based on the rings was 2.42% (2 ring), 74.48 % (3
ring), 18.82 % (4 ring), 2.50 % (5 ring) and 1.76 % (6
ring).
Keywords: Polycyclic aromatic hydrocarbons, Extraction
efficiency, waste oils, Gas chromatography-mass
spectrometry
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