Development of a flow system for the determination of cadmium in fuel alcohol using vermicompost as biosorbent and flame atomic absorption spectrometry

Bianchin, Joyce Nunes; Martendal, Edmar; Mior, Renata; Alves, Vanessa N.; Araújo, Cleide Sandra Tavares; Coelho, Nívia M. M.; Carasek, Eduardo

doi:10.1016/j.talanta.2008.11.012

Cited by 73 publications

(36 citation statements)

References 13 publications

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“…Among common SPE adsorbents used nowadays for separation of metal ions such as carbonaceous adsorbents [8][9][10], other inorganic adsorbents [11,12], polymeric adsorbents [13,14], biosorbents [15,16] and composite adsorbents [17][18][19], the composite adsorbents that consist specifically of a carrier matrix and functional ligands possess essentially a higher selectivity and capacity toward target metal ions over the others. The superiority in metal selectivity mediated by specific metal-ligand interactions based on its chosen building blocks makes the particular kind of adsorbent more practical and economical [19,20].…”

Section: Introductionmentioning

confidence: 99%

Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium

Song¹,

Ma²,

Liu³

et al. 2012

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium

Song¹,

Ma²,

Liu³

et al. 2012

Journal of Colloid and Interface Science

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“…As it is evident, the VALLME method has better dynamic range (5-150 µg L -1 ), less toxicity (using ionic liquid as extraction solvent) and simplicity compared to some reported methods. [19][20][21][22] Although the other reported methods [23][24][25] have better dynamic range, limit of detection (less than 1.1 µg L -1 ) and lower relative standard deviation (less than 4%), VALLME has a better enhancement factor (except for flow injection wetting-film extraction system) 23 and relatively high rapidity. Again, because our method has low toxicity, it is possible to state that it is green.…”

Section: Comparison Of Vallme With Other Methodsmentioning

confidence: 99%

Preconcentration procedure using vortex agitator system for determination of trace levels of cadmium by flame atomic absorption spectrometry

Chamsaz¹,

Eftekhari²,

Atarodi³

et al. 2012

J. Braz. Chem. Soc.

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Um procedimento simples e rápido de microextração líquido-líquido com líquido iônico e agitação vortex (VALLME) foi usado na determinação de quantidades traço de cádmio por espectrometria de absorção atômica com chama (FAAS). O líquido iônico (IL), hexafluorato de 1-hexil-3-metilimidazólio ([Hmim][PF 6 ]), foi usado como solvente extractor. Os íons Cd 2+ foram complexados com pirrolidina ditiocarbamato de amônia (APDC), e então confinados em pequenas gotas de IL pela intervenção do sistema de agitação vortex. Alguns fatores que influenciam na extração tais como pH, concentração de ligante, quantidade de líquido iônico, tempo de extração e efeito da força iônica foram completamente investigados e otimizados. Sob condições ideais, o limite de detecção foi de 1,1 ng mL -1 . O desvio padrão relativo (RSD) foi 4,3% para 20 ng mL -1 de cádmio (n = 10), e o gráfico de calibração usando o método de preconcentração foi linear de 5 a 150 µg L -1 , com um coeficiente de correlação de 0,998. O método proposto foi aplicado com sucesso na determinação de cádmio em amostras de água e folhas de espinafre.A simple and rapid vortex-assisted ionic liquid based liquid-liquid microextraction (VALLME) procedure was used for the determination of trace amounts of cadmium by flame atomic absorption spectrometry (FAAS). Ionic liquid (IL), 1-hexyl-3-methylimidazolium hexafluorophosphate ([Hmim][PF 6 ]), was used as an extractant solvent. Cd 2+ was complexed with ammonium pyrrolidinedithiocarbamate (APDC) and then entered into the fine IL droplets by the assistance of vortex agitator system. Some effective factors that influence the extraction efficiency such as pH, ligand concentration, amount of ionic liquid, extraction time and ionic strength effect were completely investigated and optimized. Under the optimum conditions, the limit of detection (LOD) was 1.1 ng mL -1 . The relative standard deviation (RSD) was 4.3% for 20 ng mL -1 of cadmium (n = 10), and the calibration graph using the preconcentration method was linear from 5 to 150 µg L -1 , with a correlation coefficient of 0.998. The proposed method was successfully applied for determination of cadmium in water samples and spinach leaves.

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“…Solid-phase in-line concentration in flow-based systems was applied for determination of Cd in mg L -1 range in ethanol fuel by FAAS. The studies explored analyte retention in biosorbents such as Moringa oleifera 171 or vermicompost used as garden fertilizer. 172 Cadmium and Pb were also determined in ethanol fuel by GFAAS, exploiting a filter furnace to avoid using chemical modifiers, stabilize the volatile analytes and to short the pyrolysis step.…”

Section: Fuelsmentioning

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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Development of a flow system for the determination of cadmium in fuel alcohol using vermicompost as biosorbent and flame atomic absorption spectrometry

Cited by 73 publications

References 13 publications

Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium

Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium

Preconcentration procedure using vortex agitator system for determination of trace levels of cadmium by flame atomic absorption spectrometry

Analytical chemistry in Brazil: healthy and growing

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