Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1216, Issue 15, Pages 2989-2995Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2009.01.076
Keywords
Liquid-phase deposition; Silica nanoparticles; In-tube solid-phase microextraction; Polycyclic aromatic hydrocarbons; Endocrine disruptors
Funding
- National Science Fund for Distinguished Young Scholars [20625516]
- Program for New Century Excellent Talents in University [NCET-05-0616]
- Science Fund for Creative Research Groups [20621502]
- NSFC, and the National Key Technologies RD Program [2006BAF071303]
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A silica nanoparticle (NP)-deposited capillary fabricated by liquid-phase deposition (LPD) and modified with octadecyl groups was introduced for in-tube solid-phase microextraction coupled to high-performance liquid chromatography with UV detection (in-tube SPME-HPLC). The resultant capillary (60 cm x 50 mu m I.D.) was demonstrated to be of higher extraction capacity by comparing with an octadecyl-grafted bare capillary and an octadecyl-grafted silica-coated capillary that was prepared by sol-gel chemistry. Two groups of compounds, endocrine disruptors and polycyclic aromatic hydrocarbons, were used as model analytes to further evaluate extraction capacity of the silica NP-deposited capillary, and its reproducibility and stability was also investigated. The extraction time profiles were monitored for all the chemicals, and their limits of detection were calculated to be in the range of 0.42-0.78 and 0.034-0.19 ng/mL with RSD values of peak area less than 4.6%. (C) 2009 Elsevier B.V. All rights reserved.
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