Determination of 16 polycyclic aromatic hydrocarbons in environmental water samples by solid-phase extraction using multi-walled carbon nanotubes as adsorbent coupled with gas chromatography–mass spectrometry

Preparation, characterization and application of octadecyl modified magnesium oxide microspheres

“…Then, PAHs retained on the three sorbents were eluted with various solvents. The detailed procedure was performed according to the optimized conditions for each sorbent [6,30,32,34,38]. The results illuminate that the recoveries of 8 PAHs on Sep-Pak C18 are from 3.1% to 93.3% with RSD of 1.6-10.6% (Fig.…”

“…According to the previous reports [6,30,32,34,38], there are remarkable differences among the optimal conditions in SPE procedures, which is attributed to the employment of different SPE sorbents. In order to achieve the same PF value, 250 mL of samples containing different proportional organic modifiers were loaded through three sorbents at the same flow rate.…”

Determination of 16 polycyclic aromatic hydrocarbons in seawater using molecularly imprinted solid-phase extraction coupled with gas chromatography-mass spectrometry

“…Various pretreatment processes for the extraction and concentration of PAHs from water samples have been increasingly developed, such as liquid-phase microextraction (LPME) [9], solid-phase extraction (SPE) [10,11], stirring bar sorptive extraction (SBSE) [12], and solid-phase microextraction (SPME) [13]. SPE, due to its advantages [10,14], has been widely employed for concentration of PAHs in water samples [10,11,15,16]. Meanwhile, it is well known that low selectivity and low adsorption capacity are existing main problems associated with traditional sorbents of SPE.…”

Sample preparation procedures for analysis of organochlorinated pollutants and PAHs in surface water samples

“…A number of alternative sample preparation procedures were developed for PAHs extraction with gas chromatography (Table 2). Multi-walled carbon nanotubes (MWCNTs) were used as a novel adsorbent for SPE procedure of 16 PAHs from environmental water samples (Ma et al 2010). In this procedure, a 500 ml water sample was loaded at the flow rate of 5.0 ml/min, and after 30 min under vacuum (to remove residual water), analytes were eluted by 15 ml of n-hexane at the flow rate of 1 ml/min.…”

“…PAHs as products of incomplete combustion of organic compounds are supplied into the environment in the form of resins, oils, coal, automobile exhaust emissions and cigarette smoke. PAHs show high human carcinogenic and mutagenic effect inducing oxidative stress and oxidative DNA damage, and are easily concentrated through biological chain (Ma et al 2010 [1,2,3-c,d]pyrene, naphthalene, phenanthrene, and pyrene, and 8 of them are also recommended by the EU legislation.…”