Spectrophotometric determination of traces of iron after extraction of Fe(II)-phenanthroline complex on polyurethane foam

Bhattacharya, Swagata; Roy, S. K.; Chakraborty, Arpan

doi:10.1016/0039-9140(90)80162-9

Cited by 13 publications

(3 citation statements)

References 7 publications

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“…5 A portable dissolved oxygen meter (JPSJ-606L, LEI-CI) was used to measure the variation of DO of the samples during the experiments. The residual concentration of Fe 2+ in the solution after the oxidation reaction was determined spectrophotometrically by o-phenanthroline, as described by Bhattacharya et al 33 The changes in the surface chemical state of the catalyst before and after the reaction were evaluated by X-ray photoelectron spectroscopy (XPS, Nexsa, Thermo Scientific), respectively. The Cu 2+ concentration was determined by atomic absorption spectrometry (PinAAcle 900F, PerkinElmer, USA).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

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Nanobubble (NB) technology has demonstrated the potential to enhance or substitute for current treatment processes in various areas. However, research employing it as a novel advanced oxidation process has thus far been relatively limited. Herein, we focused on the oxidative capacity of oxygen NBs and investigated the feasibility of utilizing their enhanced oxidation of ferrous ions (Fe 2+ ) in a sulfuric acid medium when using copper as a catalyst and their effect mechanism. It was demonstrated that oxygen NBs could collapse to produce hydroxyl radicals (•OH) in the absence of dynamic stimuli using electron spin resonance spectroscopy, and methylene blue was used as a molecular probe for •OH to illustrate that NB stability, determined by their properties, is the critical factor affecting •OH release. In subsequent Fe 2+ oxidation experiments, it was discovered that both strong acidity and copper ions (Cu 2+ ) contribute to accelerating the collapse of NBs to produce •OH. While •OH derived from the collapse of NBs acts on Fe 2+ , the molecular oxygen generated homologously with •OH will further activate the catalytic oxidation of Fe 2+ by interacting with Cu 2+ . With the synergistic effect of the above two oxidationdriven mechanisms, the oxidation rate of Fe 2+ can be significantly increased up to 88% due to the exceptional properties of oxygen NBs, which facilitate the formation of an atmosphere with persistent oxygen supersaturation and the generation of oxidation radicals. This study provides significant insight into applying NBs as a prospective technology for enhanced oxidation processes.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

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“…Iodine was detected with a gas chromatography (GC) method (Mitsuhashi & Kaneda, ). Iron was measured with a phenanthroline method (Bhattacharya, Roy, & Chakraborty, ).…”

Section: Methodsmentioning

confidence: 99%

Dietary intake of iodine‐enriched eggs decreases the incidence of mouse mammary tumors caused by the activated ErbB2 oncogene

Oyama

Shimoda

Miyagawa

et al. 2018

Animal Science Journal

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Human epigenetic studies suggest that consumption of seaweed prevents mammary cancer, which possibly is explained by iodine daily intake. In this study, we evaluated the efficacy of dietary intake of iodine-enriched eggs on mammary tumor incidence caused by the expression of activated type ErbB2. Female transgenic mice were divided into three groups, and fed a basic diet, a diet supplemented with ordinary eggs, or with iodine-enriched eggs. The number of mammary tumors greater than 5 mm in diameter was recorded in mice at 6 months of age. We report that the average number of mammary tumors per mouse was significantly lower in the iodine-enriched egg-added diet group than in either the basic diet or ordinary egg diet groups. These results indicate that iodine intake through livestock-derived products can reduce the incidence of mammary cancers caused by the expression of activated type ErbB2.

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“…This technique was used to determine iron in glass and ceramic materials. 103 The method includes the preparation of Fe(II) phenanthrolinate, its sorption on PUF as an ionic associate with perchlorate ions, desorption by acetone and spectrophotometric determination at 510 nm. The range of iron concentrations determined in this way is 0.05 ± 3 mg ml 71 .…”

Section: Photometrymentioning

confidence: 99%

Polyurethane foams in chemical analysis: sorption of various substances and its analytical applications

Дмитриенко¹,

Zolotov²

2002

Russ. Chem. Rev.

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Spectrophotometric determination of traces of iron after extraction of Fe(II)-phenanthroline complex on polyurethane foam

Cited by 13 publications

References 7 publications

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Dietary intake of iodine‐enriched eggs decreases the incidence of mouse mammary tumors caused by the activated ErbB2 oncogene

Polyurethane foams in chemical analysis: sorption of various substances and its analytical applications

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