Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples

Lemos, Valfredo Azevedo; Baliza, Patrícia Xavier; Carvalho, Anaildes Lago de; Oliveira, Rafael Vasconcelos; Teixeira, Leonardo Sena Gomes; Bezerra, Marcos Almeida

doi:10.1016/j.talanta.2008.06.046

Cited by 62 publications

(30 citation statements)

References 34 publications

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“…The system was allowed to stand overnight in a refrigerator at 0-5 • C. The product was filtered and rinsed with cold water. A dark-red precipitate resulted and was purified by recrystallization in ethanol with activated carbon [21]. The solution of Br-TAO was prepared by dissolving 0.5 g of reagent in 250 mL of a 5% (w/v) NaOH solution.…”

Section: Synthesis Of the 4-(5 -Bromo-2 -Thiazolylazo) Orcinol (Br-tao)mentioning

confidence: 99%

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Use of Functionalized Resin for Matrix Separation and Trace Elements Determination in Petroleum Produced Formation Water by Inductively Coupled Plasma Mass Spectrometry

Santelli

Freire

Oliveira

et al. 2012

ISRN Analytical Chemistry

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This work approaches the development of a procedure for separation and determination of five trace metals (Co, Cd, Pb, Ni, and Cu) from petroleum produced formation water. This procedure uses a styrene divinyl-benzene polymeric resin modified with 4-(5 -bromo-2 -tiazolilazo) orcinol, and the determination was performed by inductively coupled plasma mass spectrometry. A response surface methodology using a Doehlert matrix was used to optimize the solid-phase extraction of the studied elements. By using 50.0 mL of sample solution for separation/preconcentration, limits of quantification of 2.4, 14, 10, 11, and 350 ng L −1 were obtained for Co, Cd, Pb, Ni, and Cu, respectively. The developed procedure was applied for determination of these trace elements in produced formation water from offshore platforms in the Brazilian Northeast.

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Section: Synthesis Of the 4-(5 -Bromo-2 -Thiazolylazo) Orcinol (Br-tao)mentioning

confidence: 99%

“…This increases lifetime and it maintains good analytical features for the developed systems [20]. Br-TAO has been synthesized for the first time and applied in an online cloud point extraction procedure for determination of Mn [21].…”

Section: Introductionmentioning

confidence: 99%

Use of Functionalized Resin for Matrix Separation and Trace Elements Determination in Petroleum Produced Formation Water by Inductively Coupled Plasma Mass Spectrometry

Santelli

Freire

Oliveira

et al. 2012

ISRN Analytical Chemistry

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“…A comparison of the LL-USAEME procedure with other reported extraction methods [33][34][35][36][37][38] for Co and Mn extraction from water samples is prresented in Table 5. The Experimental conditions were the same as Figure 1.…”

Section: Comparisonmentioning

confidence: 99%

Ultrasound-assisted emulsification microextraction of trace amounts of Co and Mn ions prior to flame atomic absorption spectrometry

Mohammadi¹,

Afzali²,

Baghelani³

et al. 2011

J. Braz. Chem. Soc.

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O presente trabalho descreve um procedimento para emulsificação-microextração de quantidades traço de íons cobalto e manganês sem uso de ligantes, assistido por ultrasom, em amostras de água. Os metais extraídos foram determinados por espectrometria de absorção atômica em chama (FAAS). Foram estudados e otimizados diversos fatores que influenciam a eficiência de extração de íons cobalto e manganês, tais como tipo e volume do solvente de extração, pH, tempo de extração, temperatura de extração e força iônica. Íons cobalto e manganês foram extraídos em um meio emulsificado acusticamente com 20,0 mL de tetracloreto de carbono. Os limites de detecção foram 0,8 e 0,5 ng mL -1 para Co(II) e Mn(II), respectivamente (3 S b /m). Oito determinações em replicata de uma mistura de 100,0 ng mL -1 de cobalto e 50,0 ng mL -1 de manganês resultaram em absorbâncias média de 0,055 e 0,061 com desvios padrão relativos de 3,2% e 2,9%, respectivamente. O procedimento proposto foi aplicado com sucesso na determinação de cobalto e manganês em amostras de água.The present work reports a procedure based on ligandless-ultrasound-assisted emulsificationmicroextraction of trace amounts of cobalt and manganese ions in water samples prior to flame atomic absorption spectrometry determination (FAAS). Different factors influencing the extraction efficiency of cobalt and manganese ions, such as type and volume of the extraction solvent, pH, extraction time, extraction temperature, and ionic strength were studied and optimized. Cobalt and manganese ions were extracted in an acoustically emulsified media by 20.0 µL carbon tetrachloride. The limits of detection were 0.8 and 0.5 ng mL -1 for Co(II) and Mn(II), respectively (3S b /m). Eight replicate determinations of a mixture of 100.0 ng mL -1 cobalt and 50.0 ng mL -1 manganese gave a mean absorbance of 0.055 and 0.061 with relative standard deviations of 3.2 and 2.9%, respectively. The proposed procedure was successfully applied to determination of cobalt and manganese in water samples.

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“…Análises em vinho, 15,18,19,28,42,60 leite e sucos 19,22,25,30,42,68,74 são temas recorrentes: controlar o nível de determinadas substâncias é uma forma de garantir a qualidade e as características organolépticas dos alimentos, além de permitir o aprimoramento dos agroprodutos brasileiros, tornando-os ainda mais competitivos no mercado internacional. Um trabalho voltado ao desenvolvimento de software para SIA foi proposto por Neira et al, 28 em 2000, para a determinação de Fe em amostras de vinho branco.…”

Section: Características E Operaçãounclassified

A análise por injeção sequencial (SIA): vinte anos em uma perspectiva brasileira

Santos¹,

Masini²

2010

Quím. Nova

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Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples

Cited by 62 publications

References 34 publications

Use of Functionalized Resin for Matrix Separation and Trace Elements Determination in Petroleum Produced Formation Water by Inductively Coupled Plasma Mass Spectrometry

Use of Functionalized Resin for Matrix Separation and Trace Elements Determination in Petroleum Produced Formation Water by Inductively Coupled Plasma Mass Spectrometry

Ultrasound-assisted emulsification microextraction of trace amounts of Co and Mn ions prior to flame atomic absorption spectrometry

A análise por injeção sequencial (SIA): vinte anos em uma perspectiva brasileira

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