Simple hollow fiber renewal liquid membrane extraction method for pre-concentration of Cd(II) in environmental samples and detection by Flame Atomic Absorption Spectrometry

Carletto, Jeferson Schneider; Luciano, Raquel Medeiros; Bedendo, Gizelle Cristina; Carasek, Eduardo

doi:10.1016/j.aca.2009.02.021

Cited by 47 publications

(30 citation statements)

References 20 publications

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“…In 1996, Jeannot and Cantwell 13 developed a liquid-phase microextraction (LPME) technique based on analyte partitioning between a drop of organic solvent (extraction phase) and a bulk aqueous sample. Different types of LPME 14 have been developed, including single drop microextraction (SDME), 15 hollow fiber LPME, 16 and homogeneous liquid-liquid extraction (HLLE). 17 Microextraction techniques are fast, simple, inexpensive, environmentally friendly, and compatible with many analytical instruments.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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Uma técnica de microextração em fase líquida foi desenvolvida para a extração e determinação de quantidades traço de íons cádmio em amostras de água. A emulsificação-microextração assistida por ultrasom através da gota orgânica flutuante solidificada (USAE-SFODME) foi empregada para a extração e a espectrometria de absorção atômica com chama (FAAS) foi empregada para a determinação de Cd. Foram investigados e otimizados os fatores que influenciam na eficiência da técnica de microextração, tais como tipo e volume de solvente, tempo, temperatura, pH, quantidade do agente quelante e efeito da concentração de cloreto de sódio. Usando as condições otimizadas, um fator do enriquecimento de 81,0 foi obtido para um volume de 6,0 mL de amostra de água. A curva analítica de calibração mostrou-se linear no intervalo de 10-450 mg L -1 com um limite de detecção (LOD) igual a 0,66 mg L -1 de Cd. Os desvios padrão relativos (RSD) para dez replicatas de soluções contendo 20 e 300 mg L -1 de Cd foram 3,34% e 2,42%, respectivamente. O método proposto foi avaliado pela determinação de Cd em material de referência certificado de água ou através de experimentos de adição e recuperação.A liquid-phase microextraction technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry (FAAS) for the extraction and determination of trace cadmium in water samples. Microextraction efficiency factors, such as extraction solvent type and extraction volume, time, temperature, pH, the amount of the chelating agent, and salt effect, were investigated and optimized. Under optimum conditions, an enrichment factor of 81.0 was obtained for 6.0 mL of water sample. The calibration graph was linear in the range of 10-450 mg L -1 with a detection limit of 0.66 mg L -1 . The relative standard deviations (RSD) for ten replicate measurements of 20 and 300 mg L -1 of Cd were 3.34% and 2.42%, respectively. The accuracy of the proposed method was assessed either by determination of Cd in a certified reference material of water or by addition-recovery experiments.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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“…Thiol-functionalized ionic liquid for highly selective extraction of Cd(II) was also reported by Wang et al [20]. A variety of sensitive and selective analytical techniques have been used for the determination of trace cadmium in different samples [21][22][23][24][25]. The aim of the present work was thus to develop a new method for cadmium determination with ionic liquid-based HF-SLME.…”

Section: Introductionmentioning

confidence: 86%

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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“…111 Eberlin and Silva 112 proposed a method combining solid phase microextraction (SPME) and direct mass spectrometric analysis for chlorophenols determination in water. Carletto et al 113 used a hollow fiber for Cd(II) preconcentration in water samples and the enrichment factor was 120. Menegário et al 114 performed an on-line redox speciation analysis of Sb using L-proline immobilized on controlled pore glass and hydride generation ICP OES.…”

Section: Environmentalmentioning

confidence: 99%

Analytical chemistry in Brazil: healthy and growing

Rocha

Pereira-Filho²,

Nóbrega³

2009

J. Braz. Chem. Soc.

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A química brasileira está crescendo rapidamente, sendo um dos principais alicerces para o contínuo desenvolvimento do país. Inspirados no 15º Encontro Nacional de Química Analítica, ENQA, com um número recorde de participantes e comunicações, decidiu-se revisar os recentes desenvolvimentos em química analítica no Brasil. Foram escolhidas as mesmas áreas de aplicação adotadas para a organização temática do ENQA e selecionados artigos publicados por autores brasileiros em 7 periódicos de ampla penetração na área. Os dois periódicos científicos editados pela Sociedade Brasileira de Química também foram pesquisados. Esta revisão não é exaustiva, porém os trabalhos selecionados após 2008 mostram uma significativa visão geral da área. Pode-se concluir que a química analítica brasileira está saudável, em crescimento e certamente atenderá as demandas do país como uma potência emergida.Chemical sciences in Brazil are growing fast and being one of the main supports for the continuous development of the country. Inspired on the 15 th Brazilian Meeting on Analytical Chemistry, ENQA, with a record number of participants and communications, we have decided to review recent developments in analytical chemistry in Brazil. We have chosen the same application areas used for the thematic organization of the ENQA and have searched papers published by Brazilian authors in 7 major and general journals in analytical chemistry. The two scientific journals published by the Brazilian Chemical Society were also searched. This review is not comprehensive, but the selected papers published after 2008 shown an impressive overview of the area. We may conclude that analytical chemistry is healthy and growing in Brazilian scenario and certainly will attend the demands of Brazil as an emerged power.

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Simple hollow fiber renewal liquid membrane extraction method for pre-concentration of Cd(II) in environmental samples and detection by Flame Atomic Absorption Spectrometry

Cited by 47 publications

References 20 publications

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

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

Analytical chemistry in Brazil: healthy and growing

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