Amino-silica/graphene oxide nanocomposite coated cotton as an efficient sorbent for needle trap device

• Published in: Analytica chimica acta Vol. 975; pp. 11 - 19
• Main Authors: Heidari, Nahid, Ghiasvand, Alireza, Abdolhosseini, Sana
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 04.07.2017; Elsevier BV
• Subjects: Cotton; Cotton/graphene oxide/amino-silica nanocomposite; Covalence; Desorption; Extraction; Flow rates; Flow velocity; GC-FID; Graphene; Linearity; Nanocomposites; Needle trap device; PAHs; Polycyclic aromatic hydrocarbons; Sediment pollution; Silica; Silicon dioxide; Soil; Soil contamination; Soil pollution; Soils; Stainless steel; Temperature effects; Soil; PAHs; Needle trap device; Cotton/graphene oxide/amino-silica nanocomposite; GC-FID
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2017.04.031

Cotton and silica are easily available and plentiful natural materials, with significant sorptive properties, which can be provided easily at low prices. In this research, a novel and effective sorbent was synthesized by covalent attachment of amino-silica/graphene oxide nanocomposite to the cotton (Cot/GO/Si) and packed into a stainless steel needle for preparation a needle trap device (NTD). The nanocomposite sorbent was characterized by SEM and FT-IR. The Cot/GO/Si packed NTD was used for direct extraction of PAHs from polluted soil samples, followed by GC-FID measurement. Different affecting experimental variables, including extraction temperature, flow rate, desorption time and temperature were studied and optimized. Under the optimal conditions, good linearity of the calibration curves (R2 > 0.99) was obtained over the concentration range of 0.01–1.0 μg g−1. The limits of detection, limits of quantification and relative standard deviations were found to be in the ranges of 0.05–0.17 ng g−1, 0.2–0.6 ng g−1 and 9.7–15.4% (n = 6), respectively. Finally, the proposed NTD-GC-FID method was successfully applied for the extraction and determination of PAHs in contaminated soil samples. [Display omitted] •Cotton and silica are easily available, low price and plentiful natural materials which are suitable for preparation of extraction sorbents.•A novel sorbent was synthesized by covalent attachment of amino-silica/graphene oxide nanocomposite to the cotton.•The nanocomposite was packed within a capillary needle to prepare a cost-effective and reliable NTD.•The NTD was coupled to GC-FID and successfully used for the extraction of PAHs from solid samples.•The prepared NTD was 1–2.5 times better than those packed with commercial sorbents.