Determination of selenium by atomic absorption spectrometry with miniaturized suction-flow hydride generation and on-line removal of interferences

Ikeda, Masahiko

doi:10.1016/s0003-2670(00)81745-6

Cited by 33 publications

(8 citation statements)

References 23 publications

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“…For sample digestion, the main problem may arise from the peculiar chemical resistance of some organoselenium compounds (selenoamino acid, selenonium salts) to be transformed into inorganic Se salts, selenite or selenate forms. Tomatoes have rather high organic selenium 17 . The residues of organic matter, however, could interfere the hydride generation, if the acid digestion of the sample was not completed.…”

Section: Resultsmentioning

confidence: 99%

“…The tolerance limits for other hydride-forming elements in the determination of selenium could be improved by one or two orders of magnitude by using a flow injection (FI) instead of a batch system and optimizing the analytical conditions systematically 14 . According to the literature on total selenium determination in biological and environmental materials, the combination of FI techniques with HGAAS is an accepted method [15][16][17][18] . In previous study, only one paper has described the FI closed system with thermal heating at 140°C for the determination of Se(IV) and Se(VI) by HGAAS with on-line prereduction of Se(VI) to Se(IV) 19 .…”

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confidence: 99%

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The Effect of Inorganic and Organic Pre-reducing Agents on Selenium Analysis in Tomato Sample using Microwave-Assisted Digestion Followed by FI-HGAAS

Limchoowong¹,

Tan-Umporn²,

Laijungred³

et al. 2015

Orient. J. Chem

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Optimum pre-reducing agents used to convert Se(VI) to Se(IV) for speciation analysis of inorganic selenium in tomato were investigated by FI-HGAAS. It was found that optimal conditions of Se(IV) consisted of 2 M HCl as carrier and 0.3%(w/v) NaBH 4 in 0.2%(w/v) NaOH as reducing agent. Concerning the completely pre-reduction of Se(VI), various reducing agents were studied including KCl, KBr, KI, ascorbic acid and thiourea in association with dilute and concentrate HCl and effect of temperature. From results, two optimal pre-reducing agents:0.5%(w/v) KI/conc. HCl and 0.5%(w/v) thiourea/conc. HCl and heating for 30 min were chosen, giving a linearity between 5 and 25 ng/mL. LOD and LOQ were 0.5 and 2 ng/L, respectively. Both of pre-reducing agents were then applied to tomato digest based on dry basis of its sample, which comparatively resulted in 5.10 mg Se(IV)/kg and 29.12 mg Se(VI)/kg using 0.5%(w/v) KI/conc. HCl, and 3.84 mg Se(IV)/ kg and 22.29 mg Se(VI)/kg using 0.5%(w/v) thiourea/conc. HCl.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

The Effect of Inorganic and Organic Pre-reducing Agents on Selenium Analysis in Tomato Sample using Microwave-Assisted Digestion Followed by FI-HGAAS

Limchoowong¹,

Tan-Umporn²,

Laijungred³

et al. 2015

Orient. J. Chem

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show abstract

“…The determination of selenium in copper alloys and nickel sponges was reported by Ikeda [79]. In this work, an on-line removal of transition metal interferences was accomplished by a minicolumn of a chelating resin with iminodiacetate groups before an AAS detection.…”

Section: Sampling Systemsmentioning

confidence: 97%

State of the art in on‐line techniques coupled to flow injection analysis FIA/on‐line‐ a critical review

Puchades

Maquieira

Atienza

et al. 1990

Journal of Analytical Methods in Chemistry

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Flow injection analysis (FIA) has emerged as an increasingly used laboratory tool in chemical analysis. Employment of the technique for on-line sample treatment and on-line measurement in chemical process control is a growing trend. This article reviews the recent applications of FlA. Most papers refer to on-line sample treatment. Although FIA is very well suited to continuous on-line process monitoring, few examples have been found in this areamost of them have been applied to water treatment or fermentation processes.

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“…32 Muromac A-1 does not swell or shrink from the NH4 + to the H + form, and has been used in FI preconcentration systems for hydride generation AAS, 32 flame AAS, 33,34 and ICP-AES. 35,36 The chelating properties of Muromac A-1 for metal ions were investigated by Hirata et al 34 Cu and Cd were adsorbed quantitatively on Muromac A-1 in the pH range 2 -5, and a 10000-fold weight excess of Na, K, Ca, Mg and Fe did not substantially affect the recovery of Cd.…”

Section: Adsorbent For Preconcentration Of Cadmiummentioning

confidence: 99%

Determination of Traces of Cadmium in Natural Water Samples by Flow Injection On-line Preconcentration-Graphite Furnace Atomic Absorption Spectrometry

et al. 2001

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Determination of selenium by atomic absorption spectrometry with miniaturized suction-flow hydride generation and on-line removal of interferences

Cited by 33 publications

References 23 publications

The Effect of Inorganic and Organic Pre-reducing Agents on Selenium Analysis in Tomato Sample using Microwave-Assisted Digestion Followed by FI-HGAAS

The Effect of Inorganic and Organic Pre-reducing Agents on Selenium Analysis in Tomato Sample using Microwave-Assisted Digestion Followed by FI-HGAAS

State of the art in on‐line techniques coupled to flow injection analysis FIA/on‐line‐ a critical review

Determination of Traces of Cadmium in Natural Water Samples by Flow Injection On-line Preconcentration-Graphite Furnace Atomic Absorption Spectrometry

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