Flow-injection on-line sorption preconcentration in a knotted reactor for electrothermal atomic absorption spectrometric determination of ultratrace amounts of cobalt in natural waters

Yan, Xiu‐Ping; Mol, Willy Van; Adams, F.

doi:10.1002/(sici)1098-2728(1997)9:4<191::aid-lra5>3.0.co;2-w

Cited by 14 publications

(5 citation statements)

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“…A FI-ETAAS method was developed for the determination of ultra-trace amounts of cobalt in natural waters. [22] The preconcentration was achieved by online complexation of cobalt with APDC and subsequent sorption of the complex onto the inner walls of a KR. In this work, in order to reduce the eluate volume and to minimize dispersion, an air flow was used to drive the eluent for the elution of the adsorbed analyte and dispel the eluate into the graphite tube.…”

Section: Ammonium Pyrrolidine Dithiocarbamatementioning

confidence: 99%

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

Cerutti

Wuilloud

Martínez

2005

Applied Spectroscopy Reviews

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The progress in flow-injection (FI) on-line separation and preconcentration employing knotted reactors (KRs) as a sorption medium for organometallic complexes associated to atomic spectrometry techniques is reviewed in this article, focusing the attention on the more frequently complexing agents used. In the last years, the KR has demonstrated to be an excellent alternative in the FI on-line preconcentration procedures; the on-line preconcentration and separation of different metallic species on the inner walls of the KR have been developed utilizing diverse organic and inorganic reagents. The choice of complexing reagents, the coupling of the FI preconcentration system to atomic spectrometry techniques, and the application of the methodologies developed to different samples are discussed.

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Section: Ammonium Pyrrolidine Dithiocarbamatementioning

confidence: 99%

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

Cerutti

Wuilloud

Martínez

2005

Applied Spectroscopy Reviews

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“…Tao and Fang (110) incorporated a novel gravity phase separator into a FI-ETAAS system which was used for on-line solvent extraction preconcentration of Ni. Adams and co-workers used FI-ETAAS for the on-line separation and preconcentration of Sb (111), Tl (112), Pb (113), and Co (114). In each case, the analyte was chelated and sorbed on the inner wall of a knotted PTFE reactor.…”

Section: Electrothermal Atomizationmentioning

confidence: 99%

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Jackson

1998

Anal. Chem.

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“…Up to now, various SPE sorbents have been employed for the preconcentration and determination of cobalt both in batch and FI modes. Some of these sorbents include C-18 bonded silica, 9-12 activated carbon, [13][14][15][16] functionalized cellulose, 17,18 knotted reactor, [19][20][21][22] modified alumina, [23][24][25][26] silica gel modified with glycerol, 27 and C-60 fullerene. 12 Among these solid phase sorbents, a good alternative to achieve very versatile systems that can be applied to a wide range of samples is the use of polymeric solid supports functionalized with complexing reagents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

Chamjangali

Sharif-Razavian

Bahramian

2010

J. Braz. Chem. Soc.

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Foi desenvolvido um método simples e sensível de espectrometria de absorção atômica em chama com injeção por fluxo para a pré-concentração em linha e determinação de níveis traço de cobalto(II). Uma mini-coluna empacotada com poliestireno clorometilado e funcionalizado com N,N-bis(naftilidenoimina)dietilenotriamina (PS-NAPdien) foi utilizada para o enriquecimento em sistema de fluxo de cobalto(II) a partir de amostras em pH 7.0. Todas as variáveis químicas e de fluxo foram otimizadas. Sob condições ótimas, o gráfico de calibração foi linear na faixa de concentração de 1.0-80.0 e 0.30-0.40 µg L -1 para a pré-concentração de volumes de soluções de 10.0 e 20.0 mL, respectivamente. Os valores de limites de detecção para a pré-concentração de amostras para volumes de 10.0 e 20.0 mL foram 0.75 e 0.25 µg L -1 , respectivamente. Um fator de enriquecimento de 110 para um volume de amostra de 10.0 mL foi obtido. Os desvios padrão relativos para 10 replicatas de cobalto(II) nos níveis de 10.0 e 60.0 µg L -1 foram 4.7 e 3.3%, respectivamente. A exatidão do método proposto foi demonstrada a partir da determinação de Co(II) em diferentes amostras de água usando experimentos de adição e recuperação.A simple and sensitive flow injection-flame atomic absorption spectrometric (FI-FAAS) method was developed for on-line preconcentration and determination of trace levels of cobalt(II). A mini-column packed with a chloromethylated polystyrene, functionalized with N,N-bis(naphthylideneimino)diethylenetriamine (PS-NAPdien) was used for on-line enrichment of cobalt (II) , respectively. An enrichment factor of 110 for a sample volume of 10.0 mL was obtained. The relative standard deviations for 10 replicate determinations of cobalt(II) at the 10.0 and 60.0 µg L -1 levels were 4.7 and 3.3%, respectively. The accuracy of the proposed method was demonstrated by determining Co(II) in different spiked water samples.Keywords: flame atomic absorption spectrometry, on-line preconcentration, flow injection, polystyrene, cobalt(II) IntroductionCobalt is an essential element for humans and animals because it is associated with the synthesis of vitamin B 12 . On the other hand, cobalt is also classified as an environmental toxin. It can harm the natural environment, even at low concentrations, through its inherent toxicity and its tendency to accumulate in the food chain. Therefore, it is clear that the determination of trace amounts of cobalt in biological and environmental samples plays an important role in the fields of environmental surveillance, food control, medicine and toxicology.Atomic spectrometric methods are extensively employed for the quantification of metal species.1 In particular, FAAS has been one of the most applied methods for the determination of inorganic elements in a variety of samples.2 However, its main problem is the low sensitivity for some elements at the µg L -1 level. To improve FAAS sensitivity and selectivity, preconcentration procedures are frequently required. Solid phase extraction (SPE) has found increasing appl...

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Flow-injection on-line sorption preconcentration in a knotted reactor for electrothermal atomic absorption spectrometric determination of ultratrace amounts of cobalt in natural waters

Abstract: A flow-injection on-line sorption preconcentration-electrothermal atomic absorption spectrometric (ETAAS) method has been developed for the deter-

Cited by 14 publications

References 13 publications

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

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

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

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