Benzene extraction in environmental samples based on the mixture of nanoactivated carbon and ionic liquid coated on fused silica fiber before determination by headspace solid-phase microextraction-gas chromatography

Abstract

In this study, the mixture of nano activated carbon (NAC) and ionic liquid (3-triphenylphosphonio-propane-1-sulfonate; C21H21O3PS) was coated on fused silica fiber of SPME holder (NAC-IL-FSF/SPME). Then NAC/IL was used for determining of benzene in soil and vegetables samples (1.0 g, n=50) surrounding a chemical industry zone. After benzene adsorption on NAC-IL based on head space solid phase micoextraction (HS-SPME), the concentration of benzene was simply determined by introducing probe to injector of gas chromatography with flame-ionization detection (GC-FID). All effected parameters such as the sorbent mass, the amount of sample, the temperature, and the interaction time were optimized in glass chromatography vials by static procedures. The benzene vapor was absorbed from soil and vegetables samples with NAC-IL-FSF/SPME holder for 10 min at 80oC (10 mg of NAC and 0.1 g of ionic liquid in 0.5 mL of acetone coated on FSF). Then the benzene was desorbed and determined by GC-FID spectrometry. The extraction efficiency and absorption capacity of adsorbent were obtained 98.5% and 127.2 mg g-1, respectively. The high surface area of NAC and favorite interaction of aromatic chain in IL (π-π), caused to efficiently remove of benzene vapor by HS-SPME procedure as compared to other nanostructures.

Modified carbon paste electrode based on nanotechnology for determining phenol in the liquid solutions by cyclic voltammetry and comparing to high-performance liquid Chromatography

“…Quantum carbon dots, nitrogen carbon quantum dots, and graphene quantum dots (GQDs) are used in several fields, such as the manufacture of solar cells [26][27], the environmental and analytical fields as determining ion Cu(II) and monitoring for bisphenol [28]. Some adsorbents were used to remove pollutants from environmental matrixes such as ethylbenzene [29], Pb(II) and Cd(II) ions [30], BTEX (Benzene, Ethylbenzene, Toluene, Xylenes), etc [31], they are also used in perchloroethylene vapor adsorption [32]. Another technology based on nanoadsorbents and ionic liquids was used for the removal/ extraction of organic materials in different matrixes [33][34][35][36][37].…”