Journal
TALANTA
Volume 115, Issue -, Pages 427-434Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2013.05.068
Keywords
Acetaldehyde; Cigarette; Gas chromatography-mass spectrometry; Phenyl group-functionalized magnetic; mesoporous microspheres; Magnetic solid-phase extraction
Categories
Funding
- National Basic Research Priorities Program [2012CB910602, 2013CB911201]
- National Natural Science Foundation of China [21075022, 21275033, 21105016]
- Research Fund for the Doctoral Program of Higher Education of China [20110071110007, 20100071120053]
- Shanghai Leading Academic Discipline Project [B109]
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Acetaldehyde is regarded as a toxic mainstream cigarette smoke constituent, and measurement of acetaldehyde in complex real samples is difficult owing to its high volatility and reactivity. In this work, phenyl group-functionalized magnetic mesoporous microspheres were developed as the solid-phase extraction sorbents for enrichment and analysis of acetaldehyde in mainstream cigarette smoke. The functional magnetic microspheres were first synthesized through a facile one-pot co-condensation approach. The prepared nanomaterials possessed abundant silanol groups in the exterior surface and numerous phenyl groups in the interior pore-walls, as well as a large surface area (273.5 m(2)/g), strong superparamagnetism and uniform mesopores (3.3 nm). Acetaldehyde in mainstream cigarette smoke was collected in water and derivatizated with O-2,3,4,5,6-(pentafluorobenzyl)hydroxylamine. The formed acetaldehyde oximes were extracted and enriched by the prepared adsorbents via pi-pi interactions and subsequently analyzed using GC-MS. Extraction conditions such as amounts of sorbents, eluting solvent, adsorption and desorption time were investigated and optimized to achieve the best efficiency. Method validations including linearity, recovery, repeatability, and limit of detection were also studied. It was found that the suggested methodology provided low detection limit of 0.04 mg/mL, good recovery of 88-92%, intra-day and inter-day RSD values of 4.5% and 10.1%, and linear range of 0.25-4 mg/ mL (R-2=0.999). The results indicated that the proposed method based on phenyl-functionalized magnetic mesoporous microspheres was rapid, efficient and convenient for the enrichment and analysis of acetaldehyde in tobacco. (C) 2013 Elsevier B.V. All rights reserved.
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