A review on molybdenum determination in solid geological samples

Das, Arabinda; Chakraborty, Ruma; Cervera, M. Luisa; Guárdia, Miguel de la

doi:10.1016/j.talanta.2006.07.017

Cited by 70 publications

(38 citation statements)

References 68 publications

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“…Several chelating groups which were attached on the adjacent chitosan-monomer may also coordinate with the Cu ions. Thermodynamic data suggest that Mo should have an oxidation state of Mo(VI) in oxygenated waters [2], and Mo principally occurs as molybdate column. In general, longer contact time will result in better adsorption efficiency of the analytes on the resin.…”

Section: Ccts-thr Adsorption Capacitymentioning

confidence: 99%

“…A deficiency of molybdenum in human diet adversely affects growth and may lead to neurogical disorders and even death [1]. On the other hand, the intake of high concentration of Mo results in severe gastrointestinal irritation and death due to cardiac failure [2]. Its excess may also cause bone deformation, teeth vulnerable to caries and disturbances in the metabolism of fats and proteins.…”

mentioning

confidence: 99%

“…The sensitivity of inductively coupled plasma atomic emission spectrometer (ICP-AES) enables the measurement of molybdenum and vanadium in ppb level, but separation techniques are often necessaries prior to measurements because of serious interferences from matrix condition of samples [2,5]. Moreover, the concentration of molybdenum and vanadium in relative clean water falls in sub-ppb level thus caused the direct measurement even more difficult to be done and adequate preconcentration step become necessary prior to measurement.…”

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confidence: 99%

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Synthesis of cross-linked chitosan functionalized with threonine moiety and its application to on-line collection/concentration and determination of Mo, V and Cu

Hakim

Sabarudin

Oshita

et al. 2008

Talanta

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A novel chitosan-based resin functionalized with threonine moiety was synthesized, and applied to the collection/concentration of Mo, V, and Cu in environmental water samples, followed by their determination using inductively coupled plasma-atomic emission spectrometer (ICP-AES). The synthesized resin, crosslinked chitosan-threonine (CCTS-Thr), showed good adsorption behavior toward trace amounts of Mo, V, and Cu in a wide pH range.The adsorbed elements can be easily eluted using 2 mol L -1 of nitric acid, and their recoveries were found to be 90-100%. The CCTS-Thr was packed in a mini-column, which was then installed in a computer-controlled auto-pretreatment system (Auto-Pret System) for on-line trace-elements collection and determination by ICP-AES. Experimental parameters related to the improvement of sensitivity and reproducibility were optimized. The limits of detection (LODs) for target metals were found to be in sub-ppb level. The proposed method with L. Hakim et al. CCTS-Thr resin was successfully applied to the determination of Mo, V, and Cu in environmental water samples. The recovery test showed that common matrices which exist in environmental water samples did not interfere with the determination.

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Section: Ccts-thr Adsorption Capacitymentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Synthesis of cross-linked chitosan functionalized with threonine moiety and its application to on-line collection/concentration and determination of Mo, V and Cu

Hakim

Sabarudin

Oshita

et al. 2008

Talanta

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“…[17][18] The degree of variability in the results obviously depends also on the repeatability of the extraction yields, which can be optimized using the proper experimental conditions, and of the analytical determinations. In some works 16,19 a low precision was obtained in the analysis of the first fractions, because of the low levels of analyte extracted and the heavily saline matrices. In favourable conditions (i.e.…”

Section: Sources Of Variabilitymentioning

confidence: 99%

The Use of Sequential Extraction Procedures for the Characterization and Management of Contaminated Soils

Abollino¹,

Giacomino²,

Malandrino³

et al. 2005

Annali di Chimica

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Metal mobility and availability in solid samples, such as soils, sediments and sludges, is frequently studied with sequential extraction procedures, which allow to partition the total metal content into classes of different reactivity. From the experimental point of view, each extraction step requires many practical operations, which can represent sources of error if they are not properly executed. The first part of the paper gives indication on how to perform sequential extractions, from sample pretreatment to extract analysis, in order to reduce experimental errors. The second part describes the main applications of sequential extraction schemes for the characterization and management of contaminated soils: the assessment of the risks associated to metal pollution, the evaluation of the feasibility and efficiency of remediation techniques, the study of soil properties and of metal behaviour and plant availability.

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“…Its toxicity is attributed to its harmful effects on the central nervous system that cause neuropsychiatric disorders (da Silva and Williams 1993). Mercury is usually present at low concentration levels in environmental samples as free metal or as complexes with inorganic and organic ligands (Das et al 2001). Many analytical techniques have been employed for metal analysis, such as atomic absorption spectrometry (AAS) (Gadzekpo et al 2000), X-ray fluorescence (Turyan and Mandler 1997), or UV spectrophotometry (Wittner and Riklin 1994), induced coupled plasma-atomic emission spectrometry (ICP-AES) (Krull et al 1986), and induced coupled plasma-mass spectrometry (ICP-MS) (Harrington and Catterick 1997).…”

Section: Introductionmentioning

confidence: 99%

Determination of Mercury Using a Novel Sonogel‐Carbon 3‐Methylthiophene Electrode

et al. 2006

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A solid Sonogel-Carbon electrode was modified for the determination of Hg (II) in industrial waste water. 3-Methylthiophene (3MT), pyrrol, poly-3-methylthiophene (P3MT), polypyrrol, and C18 were used for the chemical modification. The obtained composite electrodes were tested for their response to Hg(II); the best results were observed for the 3MT monomer modification with a detection limit of 10 22 mg . l 21 and 3 weeks lifetime of use. A linear relationship between anodic peak height and concentration inside the range of 0.07 -0.42 mg . l 21 was obtained. A study of interferences due to other heavy metal is also included.

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A review on molybdenum determination in solid geological samples

Cited by 70 publications

References 68 publications

Synthesis of cross-linked chitosan functionalized with threonine moiety and its application to on-line collection/concentration and determination of Mo, V and Cu

Synthesis of cross-linked chitosan functionalized with threonine moiety and its application to on-line collection/concentration and determination of Mo, V and Cu

The Use of Sequential Extraction Procedures for the Characterization and Management of Contaminated Soils

Determination of Mercury Using a Novel Sonogel‐Carbon 3‐Methylthiophene Electrode

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