Hollow fiber supported liquid membrane extraction coupled with thermospray flame furnace atomic absorption spectrometry for the speciation of Sb(III) and Sb(V) in environmental and biological samples

Ionic liquid-based hollow fiber supported liquid membrane extraction combined with thermospray flame furnace AAS for the determination of cadmium

“…The TS-FF-AAS system consisted of a peristaltic pump for sampling (model HL-2, Huxi Analytical Instrumental Co., Shanghai, China, http://www.shhuxi.com/) and a labmade thermospray flame furnace unit. The sampling unit and lab-made thermospray flame furnace unit were detailedly described in another previous work [8]. The nickel tube was located on the burner of FAAS by a lab-made stainless steel support, which could be freely moved into and out of the flame.…”

“…Hollow fiber supported liquid membrane extraction (HF-SLME) is a promising microextraction technique for preseparation and preconcentration and has attracted considerable attention in recent years [1][2][3][4][5][6][7][8][9][10]. As a new miniaturized separation and preconcentration technique, HF-SLME owns many advantages over traditional liquid-liquid extraction, such as low cost, safety, environmentally benign and high enrichment factors.…”

“…As a new miniaturized separation and preconcentration technique, HF-SLME owns many advantages over traditional liquid-liquid extraction, such as low cost, safety, environmentally benign and high enrichment factors. HF-SLME has been extensively used for preconcentration a wide range of environmentally and biologically important analytes [1][2][3][4][5][6][7][8][9][10], possibly because of HF-SLME successfully bridging the modern analytical instrumentation with microsampling volume and the low concentration of analytes.…”

Ionic liquid-based hollow fiber liquid-phase microextraction for the determination of trace lead (II) in environmental water and tea drinks samples by graphite furnace atomic absorption spectrometry

“…Several analytical techniques including hydride generation atomic fluorescence spectroscopy (HG-AFS) [4], hydride generation and inductively coupled plasma optical emission spectrometry (HG-ICP-OES) [5], flame atomic absorption spectrometry (FAAS) [6], and Graphite Furnace Atomic Absorption Spectrometry (GF-AAS) [1] have been applied to the determination of heavy metals in various samples. Among these analytical techniques, GF-AAS has low detection limit, high sensitivity, and the injection volume is relatively small.…”

“…However, due to the low concentration of Pb(II) in samples, these analytical techniques including GF-AAS for direct determination of Pb(II) are difficult and could cause poor analytical accuracy and Abstract A three-phase hollow fiber liquid-phase microextraction (HF-LPME) was used to determine the trace amounts of Lead (II) in environmental water and tea drinks. In this approach, green solvent ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM] PF 6 ) was used as membrane carrier that dissolved in hollow fiber pores. 1-(2-Pyridylazo)-2-naphthol (PAN) was placed in aqueous solution to form hydrophobic complex with Pb(II).…”