The headspace solid-phase microextraction of polycyclic aromatic hydrocarbons in environmental water samples using silica fiber modified by self assembled gold nanoparticles

Abstract

The headspace solid phase microextraction method with modified silica fibers prepared based on self assembled gold nanoparticles and sol-gel method is described for the determination of trace amount of polycyclic aromatic hydrocarbons in environmental water samples using high performance liquid chromatography-UV detection. Extraction parameters such as extraction time, extraction temperature, desorption time, type and volume of desorption solvent, sample volume and ionic strength were evaluated and optimized by experimental design. At optimum specified conditions, high characteristic performance such as reproducibility and repeatability and linear range (1-500 ng mL -1 ) along the reasonable determination coefficient up to 0.995, presence of low limit of detection (from 0.10 to 0.89 ng mL -1 ) suggest good and efficient applicability of method for estimation and quantification of understudy analytes. The proposed method was successfully applied for the extraction of polycyclic aromatic hydrocarbons in various environmental samples with relative recoveries for the spiked samples at 50 ng mL -1 of analytes in the range of 84 to 106% and RSDs below 5.1%. Also, reproducibility of fiber were in the range of 1.2-3.9, reproducibility of proposed fiber were in the range of 3.6-6.7.

Optimization of ultrasound-assisted dispersive solid-phase microextraction based on nanoparticles followed by spectrophotometry for the simultaneous determination of dyes using experimental design

“…[17]The Plackett-Burman (PBD) design help recognizing significant variables with fewer experiments, while eachvariable was tested at two levels (high and low) denoted by (+) and (-), respectively. As shown in Table S1,a 2 7-4 P-B design was applied for eight runsto estimate the significance of seven variables, while tworeplicate at central pointgive numerical value of the experimental error (pure error) [36,37].…”

Highly efficient simultaneous ultrasonic-assisted adsorption of Pb(II), Cd(II), Ni(II) and Cu (II) ions from aqueous solutions by graphene oxide modified with 2,2′-dipyridylamine: Central composite design optimization

“…Ultrasonic technique was also applied for ions removal because of improving the mass transfer. The combination of ultrasound power with such above mentioned protocols can lead to accelerating the adsorption process [30,31]. Optimization of variables such as pH solution, initial ion concentrations (mg L À1 ), adsorbent doses (mg) and sonicating time (min) on absorption efficiency was performed using central composite design (CCD) under response surface methodology.…”

A Sonochemically-Synthesized Microporous Metal-Organic Framework for the Rapid and Efficient Ultrasonic-Assisted Removal of Mercury (II) Ions in a Water Solution and a Study of the Antibacterial Activity

“…The ultrasonic technique has been used to increase and improve mass transfer [27]. The ultrasound power can accelerate the absorption process [28,29]. Cavitation (nucleus, growth, and collapse of small gas bubbles) and the high-pressure variation caused by ultrasound can cause this phenomenon [30].…”