بزرگنمایی دو انگشتی

بدون زمان بندی

0
پسند

0
دیدگاه

نویسندگان: Shima Amini, , Homeira Ebrahimzadeh , Shahram Seidi, Niloofar Jalilian

زمان بندی: بدون زمان بندی

یونیت نمایش:

برچسب: Nanostructure fabrication and characterisation

کد: GP-39625

خلاصه مقاله: An online micro solid-phase extraction (online-µSPE) using electrospun nanofibers, as an efficient sorbent, was....

An online micro solid-phase extraction (online-µSPE) using electrospun nanofibers, as an efficient sorbent, was developed to extract chlorobenzenes (CBs) from the soil, agricultural wastewater, fruit, and vegetable samples followed by high-performance liquid chromatography analysis. Electrospun nanofibers were fabricated using a nanocomposite containing polyacrylonitrile and Zn-metal organic framework 74 @graphene oxide (PAN/Zn-MOF-74@GO) and subsequently characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction analysis (XRD). FESEM images illustrated uniform and beadles nanofibers in the 369 to 515 nm diameter range. The parameters which influence the extraction efficiency such as sampling flow rate, sample volume, sorbent amount, and type of elution solvent, elution volume, elution flow rate, and extraction time were studied and optimized. Under the optimal conditions, acceptable linearity was obtained in the range of 0.25–700 ng mL-1 for 1,2-dichlorobenzene (1,2-DCB) and 2.5-700 ng mL-1 for both 1,2,3-trichlorobenzene (1,2,3-TCB) and 1,2,4-trichlorobenzene (1,2,4-TCB) with determination coefficients ≥ 0.9991. The limits of detection ranged from 0.08 to 1.1 ng mL-1. The intra-day and inter-day single fiber and fiber to fiber relative standard deviations were observed in the range of 4.1%–9.5% and 5.8%–12.1%, respectively. The performance of this method was successfully examined by determining the target analytes in different spiked samples.


دیدگاه 0

افزودن دیدگاه (Disabled by admin)