Hollow fiber supported liquid membrane extraction for ultrasensitive determination of trace lead by portable tungsten coil electrothermal atomic absorption spectrometry

Zeng, Chujie; Wen, Xiaodong; Tan, Zhiqiang; Cai, Pingyang; Hou, Xiandeng

doi:10.1016/j.microc.2010.03.008

Cited by 58 publications

(17 citation statements)

References 19 publications

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“…com/). The figure of schematic instrumental arrangement of TS-FF-AAS system is the same as our previous work [7]. 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.…”

Section: Apparatusmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Zeng

Hu²,

Luo

2011

Microchim Acta

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We have developed a simple and effective method for hollow fiber liquid-phase microextraction of cadmium. It is based on the use of a room temperature ionic liquid (RTIL) and was coupled to thermospray flame furnace AAS. The RTIL was placed in the pores of a polypropylene hollow fiber (acting as a liquid membrane) and also used as the acceptor solution. Ammonium pyrrolidinedithiocarbamate (APDC) was used as the chelating agent. The effects of the concentration of APDC, the pH of samples, stirring rates, extraction time, and potential interferences were optimized to result in a detection limit of 9 ng L −1 and an enrichment factor of 90. The relative standard deviation is 4.7% (at 0.5 ng mL −1 , for n05). The method was successfully applied to the determination of cadmium.

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Section: Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zeng

Hu²,

Luo

2011

Microchim Acta

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“…HF-LPME is one of the promising miniaturized preconcentration techniques and has attracted considerable attention in recent years [22][23][24][25][26]. HF-LPME owns many advantages over traditional liquid-liquid extraction, such as low cost, safety, environmental friendliness and high concentration factors.…”

Section: Introductionmentioning

confidence: 99%

Room temperature ionic liquids enhanced the speciation of Cr(VI) and Cr(III) by hollow fiber liquid phase microextraction combined with flame atomic absorption spectrometry

Zeng¹,

Lin²,

Zhou³

et al. 2012

Journal of Hazardous Materials

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“…They have a very broad range of applications for various types of separations and extraction methods (LPME, SPME, SBSE, etc.) [41,42]. They were used as a protective material during SPME [24].…”

Section: Introductionmentioning

confidence: 99%

Combination of solid‐phase extraction‐hollow fiber for ultra‐preconcentration of some triazole pesticides followed by gas chromatography‐flame ionization detection

Farajzadeh

Khoshmaram

Mogaddam

2011

J of Separation Science

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In this study, an extraction and preconcentration technique using solid-phase extraction (SPE) along with hollow fiber (HF) has been developed as an ultra-preconcentration technique for some triazole pesticides in aqueous samples. Triazole pesticides were employed as model compounds to assess the method and were monitored by gas chromatography-flame ionization detection (GC-FID). Initially, an aqueous solution of target analytes was passed through an RP-8 SPE cartridge and then the adsorbed analytes were eluted with μL amounts of toluene. The collected elute was slowly introduced into an HF that had one end blocked. This allowed precipitation inside the lumen and pores of the HF. Finally, the obtained HF was mounted on a home-made solid-phase microextraction syringe and entered into the GC injection port for thermal desorption-GC analysis. The effect of various experimental parameters including injection port temperature, desorption time, state of HF, washing solvent, elution solvent and its volume, sample volume, etc. were investigated for finding the optimum conditions. The calibration graphs were linear in the ranges of 2-1000 ng/mL (penconazole and hexaconazole), 5-1000 ng/mL (tebuconazole), 15-1000 ng/mL (triticonazole) and the detection limits (LODs) ranged from 0.6 to 4.5 ng/mL. The enhancement factors were in the range of 870-950. The relative standard deviations (RSD%) for five repeated experiments (C=250 ng/mL of each pesticide) varied from 4.5 to 8.7%. The relative recoveries obtained for analytes in grape juice samples, spiked with different levels of each pesticide, were in the range of 87-119%.

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Hollow fiber supported liquid membrane extraction for ultrasensitive determination of trace lead by portable tungsten coil electrothermal atomic absorption spectrometry

Cited by 58 publications

References 19 publications

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

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

Room temperature ionic liquids enhanced the speciation of Cr(VI) and Cr(III) by hollow fiber liquid phase microextraction combined with flame atomic absorption spectrometry

Combination of solid‐phase extraction‐hollow fiber for ultra‐preconcentration of some triazole pesticides followed by gas chromatography‐flame ionization detection

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