Title

Solid-Phase Nano-Extraction And Laser-Excited Time-Resolved Shpol'Skii Spectroscopy For The Analysis Of Polycyclic Aromatic Hydrocarbons In Drinking Water Samples

Keywords

Gold; Nanoparticles; PAH; Polycyclic aromatic hydrocarbons; Shpol'skii spectroscopy; Solid-phase extraction; Water

Abstract

A unique method for screening polycyclic aromatic hydrocarbons in drinking water samples is reported. Water samples (500 μl) are mixed and centrifuged with 950 μl of a commercial solution of 20 nm gold nanoparticles for pollutants extraction. The precipitate is treated with 2 μl of 1-pentanethiol and 48 μl of n-octane, and the supernatant is then analyzed via laser-excited time-resolved Shpol'skii spectroscopy. Fifteen priority pollutants are directly determined at liquid helium temperature (4.2 K) with the aid of a cryogenic fiber-optic probe. Unambiguous pollutant determination is carried out via spectral and lifetime analysis. Limits of detection are at the parts-per-trillion level. Analytical recoveries are similar to those obtained via high-performance liquid chromatography. The simplicity of the experimental procedure, use of microliters of organic solvent, short analysis time, selectivity, and excellent analytical figures of merit demonstrate the advantages of this environmentally friendly approach for routine analysis of numerous samples.

Publication Date

2-15-2009

Publication Title

Analytical Biochemistry

Volume

385

Issue

2

Number of Pages

249-256

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ab.2008.11.029

Socpus ID

58149392830 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/58149392830

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