Determination of phthalate esters in drinking water and edible vegetable oil samples by headspace solid phase microextraction using graphene/polyvinylchloride nanocomposite coated fiber coupled to gas chromatography-flame ionization detector.
In the current study, a graphene/polyvinylchloride nanocomposite was successfully coated on a stainless steel substrate by a simple dip coating process and used as a novel headspace solid phase microextraction (HS-SPME) fiber for the extraction of phthalate esters (PEs) from drinking water and edible vegetable oil samples. The prepared SPME fibers exhibited high extractability for PEs (due to the dominant role of π-π stacking interactions and hydrophobic effects) yielding good sensitivity and precision when followed by a gas chromatograph with a flame ionization detector (GC-FID). The optimization strategy of the extraction process was carried out using the response surface method based on a central composite design. The developed method gave a low limit of detection (0.06-0.08μgL(-1)) and good linearity (0.2-100μgL(-1)) for the determination of the PEs under the optimized conditions (extraction temperature, 70±1°C; extraction time, 35min; salt concentration, 30% w/v; stirring rate, 900rpm; desorption temperature, 230°C; and desorption time, 4min) whereas the repeatability and fiber-to-fiber reproducibility were in the range 6.1-7.8% and 8.9-10.2%, respectively. Finally, the proposed method was successfully applied to the analysis of PEs in drinking water and edible oil samples with good recoveries (87-112%) and satisfactory precisions (RSDs<8.3%), indicating the absence of matrix effects in the proposed HS-SPME method.
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
Hatam
H
Amanzadeh
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran. Electronic address: yyamini2002@yahoo.com.
Yadollah
Y
Yamini
Department of Semiconductors, Materials and Energy Research Center, Karaj, Iran.
Morteza
M
Moradi
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
Yousef Abdossalmi
YA
Asl
D002623:Chemistry Techniques, Analytical / Q000295:instrumentation / Q000379:methods*; D002849:Chromatography, Gas; D060766:Drinking Water / Q000737:chemistry*; D004952:Esters / Q000032:analysis*; D005410:Flame Ionization; D006108:Graphite / Q000737:chemistry; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry*; D010795:Phthalic Acids / Q000032:analysis; D010938:Plant Oils / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000737:chemistry; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction; D013193:Stainless Steel / Q000737:chemistry; D013696:Temperature; D014675:Vegetables / Q000737:chemistry
D060766:Drinking Water; D004952:Esters; D010795:Phthalic Acids; D010938:Plant Oils; D013193:Stainless Steel; C032279:phthalic acid; D006108:Graphite; D011143:Polyvinyl Chloride
Gas chromatography; Headspace solid phase microextraction; Phthalate esters; Sample preparation