title: Solid-phase nanoextraction of polychlorinated biphenyls in water and their determination by gas chromatography with electron capture detector.
abstract: A solid-phase nanoextraction method has been developed for the extraction and preconcentration of polychlorinated biphenyls using carboxyl multiwalled carbon nanotubes as a solid nano-sorbent. Parameters affecting extraction efficiency such as sorbent amount, desorption solvent type and volume, extraction time, pH, and salt content have been studied. Under optimized conditions, the correlation coefficient was up to 0.9989, the limits of detection was in the range of 1.4-3.5 ng/L, and limits of quantification was between 4.8 and 11.6 ng/L. The recoveries were in the range of 99-106% for different spiked analytes. The relative standard deviation for water samples spiked with two different spiking levels has been between 4 and 10%. The proposed sustainable method is rapid, easy to use, and small consumption of organic solvent for the detection and determination of trace levels of polychlorinated biphenyls in environmental waters.
authors.affiliation: Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Shadi
authors.initials: S
authors.lastname: Piramoon
authors.affiliation: Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Parviz
authors.initials: P
authors.lastname: Aberoomand Azar
authors.affiliation: Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Saber Tehrani
authors.affiliation: Department of Chemistry, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran.
authors.forename: Sirwan
authors.initials: S
authors.lastname: Mohammadiazar
authors.affiliation: Veterinary Organization, Tehran, Iran.
authors.forename: Abdollah
authors.initials: A
authors.lastname: Tavassoli
keywords: carbon nanotubes; gas chromatography; polychlorinated biphenyls; solid-phase nanoextraction; water samples