Knotted Reactors and their Role in Flow‐Injection On‐line Preconcentration Systems Coupled to Atomic Spectrometry‐Based Detectors

Cerutti, Soledad; Wuilloud, Rodolfo G.; Martínez, Luis D.

doi:10.1081/asr-200038313

Cited by 47 publications

(35 citation statements)

References 54 publications

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“…This situation has been improved significantly by utilizing on-line system coupled with ICP-OES [7][8][9]. Some methodologies used for metal preconcentration have been developed with ionic exchanger resins [10], precipitation [11], cloud point extraction [12][13][14], knotted reactors [15][16][17] and solid-phase extraction [18][19][20][21][22]. In the present work, an on-line procedure for simultaneous preconcentration and determination of Cr, Cu, Ni, Pb and Cd at low concentration levels using ICP-OES is proposed.…”

Section: Introductionmentioning

confidence: 99%

On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry

Bezerra

Santos

Lemos

et al. 2007

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry

Bezerra

Santos

Lemos

et al. 2007

Journal of Hazardous Materials

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“…Low solubility in water and capacity to form complexes with a large variety of metals are the characteristics required for the use of these substances in precipitation methods. The precipitation efficiency is highly influenced by the hydrophobicity of ligands and complexes (Cerutti et al 2005;Tokalioglu et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Determination of copper in biological samples by flame atomic absorption spectrometry after precipitation with Me-BTAP

Lemos

Novaes

Carvalho

et al. 2008

Environ Monit Assess

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A simple and sensitive method was developed for determination of trace copper by direct precipitation preconcentration and detection with Flame Atomic Absorption Spectrometry (FAAS). The reagent 2-[2'-(6-methyl-benzothiazolylazo)]-4-aminophenol (Me-BTAP) was used as precipitating agent. The experimental conditions for the quantitative precipitation of copper, such as pH, amount of reagents, temperature and the effect of diverse ions on the precipitation have been investigated. It was found that copper is quantitatively extracted (> or =95%) and the method provides a sensitivity enhancement of 40-fold for a 10 ml sample volume with a detection limit of 0.5 microg l(-1). The proposed method was successfully applied for the determination of trace copper in water, urine and biological samples.

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“…In-tube solid-phase microextraction (ITSPME), which does not have a large difference in principle with other FI-SPE techniques using an open tubular column, uses a chemically modified silica capillary tube [39] or a PTFE tube [40] as the solid phase. Since reviews have been published lately [37,38], the on-line coupling of SPE with ETAAS appeared in the most recent papers are described here.…”

Section: Generalmentioning

confidence: 99%

“…A polytetrafluoroethylene (PTFE) tube has been used under the name "knotted reactor" [38] . In-tube solid-phase microextraction (ITSPME), which does not have a large difference in principle with other FI-SPE techniques using an open tubular column, uses a chemically modified silica capillary tube [39] or a PTFE tube [40] as the solid phase.…”

Section: Generalmentioning

confidence: 99%

Integration of Solid-phase Extraction with Electrothermal Atomic Absorption Spectrometry for Determination of Trace Elements

Nukatsuka

Ohzeki

2006

Int. J. Soc. Mater. Eng. Resour

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An enrichment step in a sample treatment is essential for trace analysis to improve the sensitivity and to eliminate the matrix of the sample. Solid-phase extraction (SPE) is one of the widely used enrichment technique. Electrothermal atomic absorption spectrometry (ETAAS) is a well-established determination technique for trace elements. The integration of SPE with ETAAS leads to further improvement of sensitivity, an automation of the measurement and the economy in the sample size, amounts of the reagents and time for the sample pretreatment. The integration is achieved by introducing the solid phase used for the enrichment directly into ETAAS for a batch method, or on-line coupling of a SPE column with ETAAS. Fine particles of various materials, including an activated carbon, an ion-exchange resin, a cellulose nitrate resin and biomass materials were used as adsorbents for batch method. A membrane filter was also used. A simultaneous multi-elements extraction and a speciation analysis were accomplished. A microcolumn packed with resin beads or an open tubular column such as a PTFE tube or a silica capillary tube having the chemically modified inner wall were used for the on-line coupling.

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Knotted Reactors and their Role in Flow‐Injection On‐line Preconcentration Systems Coupled to Atomic Spectrometry‐Based Detectors

Cited by 47 publications

References 54 publications

On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry

On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry

Determination of copper in biological samples by flame atomic absorption spectrometry after precipitation with Me-BTAP

Integration of Solid-phase Extraction with Electrothermal Atomic Absorption Spectrometry for Determination of Trace Elements

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