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Sensitive determination of polycyclic aromatic hydrocarbons in water samples by HPLC coupled with SPE based on graphene functionalized with triethoxysilane
Author(s) -
Huang KeJing,
Li Jing,
Liu YanMing,
Wang Lan
Publication year - 2013
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.201200744
Subject(s) - triethoxysilane , adsorption , extraction (chemistry) , chromatography , detection limit , chemistry , solid phase extraction , sample preparation , organic chemistry
The graphene functionalized with (3‐aminopropyl) triethoxysilane was synthesized by a simple hydrothermal reaction and applied as SPE sorbents to extract trace polycyclic aromatic hydrocarbons ( PAH s) from environmental water samples. These sorbents possess high adsorption capacity and extraction efficiency due to strong adsorption ability of carbon materials and large specific surface area of nanoparticles, and only 10 mg of sorbents are required to extract PAH s from 100 mL water samples. Several condition parameters, such as eluent and its volume, adsorbent amount, sample volume, sample pH, and sample flow rate, were optimized to achieve good sensitivity and precision. Under the optimized extraction conditions, the method showed good linearity in the range of 1–100 μg/L, repeatability of the extraction (the RSD s were between 1.8 and 2.9%, n = 6), and satisfactory detection limits of 0.029–0.1 μg/L. The recoveries of PAH s spiked in environmental water samples ranged from 84.6 to 109.5%. All these results demonstrated that this new SPE technique was a viable alternative to conventional enrichment techniques for the extraction and analysis of PAH s in complex samples.