Greener and wide applicability range flow-based spectrophotometric method for iron determination in fresh and marine water

Ribas, Tânia C. F.; Mesquita, Raquel B. R.; Moniz, Tânia; Rangel, Maria; Rangel, António O. S. S.

doi:10.1016/j.talanta.2020.120925

Cited by 10 publications

(6 citation statements)

References 29 publications

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“…This method for the metal detection in river and tap water, not involving a sample pre-treatment, resulted to be effective, in situ, portable, disposable, accurate, easily operated and cheap, in accordance with LOD and LOQ World Health Organization guidelines [ 28 ], also showing a consumption of 3,4-HPs lower than 0.2 mg per analysis. A selective flow-based method for the Fe 3+ spectrophotometric quantification in fresh and marine waters with variable salinity content was developed using the MRB13 chelator [ 29 ] and two working strategies, including and not employing an on-line solid-phase extraction (SPE). Water samples with high salinity and/or a low metal concentration were investigated by means of the first approach using a NTA resin column incorporated in the system, for the sample matrix clean-up and/or Fe 3+ pre-concentration; the second strategy was employed for waters with opposite properties.…”

Section: Mono- and Bis-(3-hydroxy-4-pyridinone) Ligandsmentioning

confidence: 99%

Hydroxypyridinone-Based Metal Chelators towards Ecotoxicity: Remediation and Biological Mechanisms

et al. 2022

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Hydroxypyridinones (HPs) are recognized as excellent chemical tools for engineering a diversity of metal chelating agents, with high affinity for hard metal ions, exhibiting a broad range of activities and applications, namely in medical, biological and environmental contexts. They are easily made and functionalizable towards the tuning of their pharmacokinetic properties or the improving of their metal complex thermodynamic stabilities. In this review, an analysis of the recently published works on hydroxypyridinone-based ligands, that have been mostly addressed for environmental applications, namely for remediation of hard metal ion ecotoxicity in living beings and other biological matrices is carried out. In particular, herein the most recent developments in the design of new chelating systems, from bidentate mono-HP to polydentate multi-HP derivatives, with a structural diversity of soluble or solid-supported backbones are outlined. Along with the ligand design, an analysis of the relationship between their structures and activities is presented and discussed, namely associated with the metal affinity and the thermodynamic stability of the corresponding metal complexes.

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Section: Mono- and Bis-(3-hydroxy-4-pyridinone) Ligandsmentioning

confidence: 99%

Hydroxypyridinone-Based Metal Chelators towards Ecotoxicity: Remediation and Biological Mechanisms

et al. 2022

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“…The main method of this study is the regression of least squares to obtain a quadratic equation based on red, green and blue hues, color saturation and brightness, which allowed to evaluate the most accurate analysis. Various methods and approaches for spectrophotometric determination of iron in substances and components have been developed in [2,5,8,11,13].…”

Section: Literature Reviewmentioning

confidence: 99%

Spectrophotometric Method for Coagulant Determining in a Stream Based on an Artificial Neural Network

Safonyk

Mishchanchuk

Hrytsiuk

2021

Lecture Notes in Computational Intelligence and Decision Making

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Spectrophotometric analysis based on artificial neural network (ANN), partial least squares regression (PLS) and basic component regression (PCR) models has been proposed to simultaneously determine coagulant (Fe) during the electrocoagulation process. An experimental laboratory installation was created to study the processes of photometric research with a device that analyzes the color and intensity of light in real time. The color sensor determines the color parameters: RGB, which, based on ANN, are translated into the HSL color space. Software for determining the concentration of iron in the coagulant using artificial intelligence, which is a web application for displaying the color parameters of the coagulant, the determined concentration of iron in the coagulant, as well as saving the history of all measurements in the database. ANN, trained using different teaching methods. An optimizer was selected for the appropriate process, the standard deviation (RMSE) is 6.91%.

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“…[26][27][28] In the case of Fe, extending the procedure by an additional step of extraction to the solid phase (NTA resin column) lowered the LOD from 11 to 3 mg L −1 , and the recovery of Fe from sea water was 101%. 29 Various types of atomic absorption spectrometry also have been applied for the determination of both metals, usually aer a proper sample pretreatment, including separation or preconcentration using liquid-liquid extraction. [30][31][32] Electroanalytical methods seem to be useful as well.…”

Section: Introductionmentioning

confidence: 99%

Corrosion process of stainless steel in natural brine as a source of chromium and iron – the need for routine analysis

Krasnodębska-Ostręga,

Drwal,

Sadowska

et al. 2023

RSC Adv.

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Greener and wide applicability range flow-based spectrophotometric method for iron determination in fresh and marine water

Cited by 10 publications

References 29 publications

Hydroxypyridinone-Based Metal Chelators towards Ecotoxicity: Remediation and Biological Mechanisms

Hydroxypyridinone-Based Metal Chelators towards Ecotoxicity: Remediation and Biological Mechanisms

Spectrophotometric Method for Coagulant Determining in a Stream Based on an Artificial Neural Network

Corrosion process of stainless steel in natural brine as a source of chromium and iron – the need for routine analysis

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