A Miniaturized Stepwise Injection Spectrophotometric Analyzer

Bulatov, Andrey; Vishnikin, Andriy B.; Москвин, Л. Н.; Ishimatsu, Ryoichi; Nakano, Koji; Imato, Toshihiko

doi:10.2116/analsci.31.529

Cited by 4 publications

(3 citation statements)

References 18 publications

(16 reference statements)

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“…[78][79][80][81][82][83] In addition, cysteine was determined based on its ability to reduce [P2Mo18O62] 6by using a stepwise injection spectrophotometric analyser, presenting a range of 9 μM -0.1 mM and a LOD of 3 μM. 84 Amperometric determination (0. /polymeric ionic liquid/rGO was also used to determine glucose, with a linear range of 2-20 mM.…”

Section: Determination Of Biomolecules and Biorelated Moleculesmentioning

confidence: 99%

Polyoxometalates in Analytical Sciences

Ueda

2020

ANAL. SCI.

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Polyoxometalates (POMs) have been used for spectrophotometric determinations of silicon and phosphorus under acidic conditions, referred to as the molybdenum yellow method and molybdenum blue method, respectively. Many POMs are redox active and exhibit fascinating but complicated voltammetric responses. These compounds can reversibly accommodate and release many electrons without exhibiting structural changes, implying that POMs can function as excellent mediators and can be applied to sensitive determination methods based on catalytic electrochemical reactions. In addition, some rare-earth-metal-incorporated POMs exhibit fluorescence, which enables sensitive determination by the enhancement and quenching of fluorescence intensities. In this review, various analytical applications of POMs are introduced, mainly focusing on papers published after 2000, except for the molybdenum yellow method and molybdenum blue method.

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Section: Determination Of Biomolecules and Biorelated Moleculesmentioning

confidence: 99%

Polyoxometalates in Analytical Sciences

Ueda

2020

ANAL. SCI.

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“…In the present work, 18-molybdodiphosphate heteropoly complex of the Dawson structure is proposed as a new reagent for the spectrophotometric determination of catechins in green tea [4,19,[21][22][23][24][25][26]. The aim of the work was to develop a simple, highly reproducible, and rapid spectrophotometric procedure for determining the sum of polyphenolic compounds in green tea using 18-MPC as a reagent, which would significantly reduce the interfering effect of the reducing agents of the nonphenolic nature.…”

Section: Fig 1 Structural Formulas Of Tea Catechinsmentioning

confidence: 99%

Spectrophotometric Determination of Polyphenols in Green Teas with 18-Molybdodiphosphate

Al-Shwaiyat¹,

Денисенко²,

Miekh³

et al. 2018

ChChT

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The reactivity of 18-molybdodiphosphate heteropoly complex (18-MPC) with respect to the polyphenolic compounds contained in green teas was estimated. The one-and two-electron heteropoly blues coexist depending on the ratio of reducing agent to 18-MPC in such reactions. The results for the determination of total content of polyphenols in green teas of different brands obtained with 18-MPC and Folin-Ciocalteu reagent are close to each other. The disadvantages of the existing methods are shown.

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“…En el 2014 V. Cerdà introduce la técnica de Chips miniaturizados para el análisis por inyección en flujo multijeringa (V. Cerdà, 2014). En estos últimos años los Chips han sido combinados con detección espectrofotométrica (Petrova, 2015) y espectrofluorimetría (Frizzarin, 2015) debido a características como la compacidad, la posición rígida permanente de los canales de procesamiento de muestras que aseguran la repetitividad de las manipulaciones microfluídicas y su compatibilidad con otros instrumentos.…”

Section: Introductionunclassified

Automatización de un proceso para la determinación de parámetros químico-analíticos de calidad en muestras de agua

Lescano¹,

Luzuriaga²,

Flores³

et al. 2019

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El conocimiento de la calidad del agua es fundamental para su evaluación, procesamiento y gestión ambiental. Para lo cual existen procesos ampliamente detallados que permiten el análisis en laboratorios, sin embargo, estos métodos establecidos por las normativas legales suelen ser largos y tediosos. Por esta razón, el objetivo de esta investigación es proponer una alternativa a la metodología tradicional de los análisis de rutina en laboratorio. Para tal fin, se ha trabajado en la automatización de un sistema que permite la detección de pH y potencial redox simultáneamente en muestras de agua combinando técnicas microfluídicas de procesos químicos y automatización a microescala. El método propuesto se ha acoplado a técnicas potenciométricas y ha sido aplicado a muestras de agua, también se ha comparado el método propuesto con el uso de tecnología 3D obteniendo un sistema versátil con una frecuencia de análisis de 5 muestras por hora disminuyendo el tiempo de análisis y los residuos obtenidos a la mitad.

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A Miniaturized Stepwise Injection Spectrophotometric Analyzer

Cited by 4 publications

References 18 publications

Polyoxometalates in Analytical Sciences

Polyoxometalates in Analytical Sciences

Spectrophotometric Determination of Polyphenols in Green Teas with 18-Molybdodiphosphate

Automatización de un proceso para la determinación de parámetros químico-analíticos de calidad en muestras de agua

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