کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5131105 | 1490877 | 2017 | 9 صفحه PDF | دانلود رایگان |
- A highly selective and sensitive derivatizing reagent for Cr(III) was synthesized and characterized.
- The magnetic-MWCNTs nanocomposite as a SPE sorbent was successfully synthesized and characterized.
- A new portable detection system was developed for microfluidic chip FIA platform.
In this paper, a rapid and simple method using magnetic multi-walled carbon nanotubes (MWCNTS), as a solid-phase extraction (SPE) sorbent, was successfully developed for extraction and preconcentration trace amounts of Cr(III) in water samples. The synthesized magnetic-MWCNTs nanocomposite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). A rhodamine derivative (R1) was synthesized and characterized as a highly selective and sensitive fluorescent derivatizing agent for Cr(III). After SPE procedure, Cr(III) analysis was performed by flow injection microfluidic chip with on-line fluorescent derivatization and laser-induced fluorescence (LIF) spectroscopy detection. The parameters, which affected the efficiency of the developed method were investigated and optimized. Under the optimized conditions, the method exhibited a linear dynamic range of 0-10.0Â nM, with a detection limit of 0.094Â nM and an enrichment factor of 38. Furthermore, real water samples were analyzed and good recoveries were obtained from 91.0 to 101.6%.
Flow injection microfluidic device with on-line fluorescent derivatization and detection coupled to LIF.145
Journal: Analytica Chimica Acta - Volume 955, 22 February 2017, Pages 58-66