Selective determination of pyridoxine in the presence of hydrosoluble vitamins using a continuous-flow solid phase sensing device with UV detection

Ayora‐Cañada, María José; Reguera, María Isabel Pascual; Dı́az, A Molina

doi:10.1016/s0378-5173(00)00431-2

Cited by 26 publications

(1 citation statement)

References 13 publications

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“…This underlines the necessity for exact and fast determination of the B6 concentration in solutions. Quantitative methods include flow-injection methods with spectrophotometric [16], chemiluminescent [17] and spectrofluorimetric detection [18] as well as chromatography methods [19,20]. The implementation of these methods is time-consuming and needs expensive apparatuses.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Rare-Earth Elements on the Morphological Aspect of Borate and Electrocatalytic Sensing of Biological Compounds

Morozov,

Stanković,

Avdin

et al. 2023

Biosensors

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Adjusting the morphological characteristics of a material can result in improved electrocatalytic capabilities of the material itself. An example of this is the introduction of rare-earth elements into the borate structure, which gives a new perspective on the possibilities of this type of material in the field of (bio)sensing. In this paper, we present the preparation of borates including La, Nd and Dy and their application for the modification of a glassy carbon electrode, which is used for the non-enzymatic detection of a biologically relevant molecule, vitamin B6 (pyridoxine). Compared with the others, dysprosium borate has the best electrocatalytic performance, showing the highest current and the lowest impedance, respectively, as determined using cyclic voltammetry and impedance tests. Quantitative testing of B6 was performed in DPV mode in a Britton–Robinson buffer solution with a pH of 6 and an oxidation potential of about +0.8 V. The calibration graph for the evaluation of B6 has a linear range from 1 to 100 μM, with a correlation coefficient of 0.9985 and a detection limit of 0.051 μM. The DyBO3-modified electrode can be used repeatedly, retaining more than 90% of the initial signal level after six cycles. The satisfactory selectivity offered a potential practical application of the chosen method for the monitoring of pyridoxine in artificially prepared biological fluids with acceptable recovery. In light of all the obtained results, this paper shows an important approach for the successful design of electrocatalysts with tuned architecture and opens new strategies for the development of materials for the needs of electrochemical (bio)sensing.

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Section: Introductionmentioning

confidence: 99%

The Effect of Rare-Earth Elements on the Morphological Aspect of Borate and Electrocatalytic Sensing of Biological Compounds

Morozov,

Stanković,

Avdin

et al. 2023

Biosensors

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Solid Phase Molecular Spectroscopy

Molina‐Díaz

García-Reyes

Ramos-Martos

2012

Handbook of Green Analytical Chemistry

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Sensitive amperometric pyridoxine sensor based on self‐assembled Prussian blue nanoparticle‐modified poly(o‐phenylenediamine)/glassy carbon electrode

Ojani

Hamidi

Raoof

2016

Applied Organom Chemis

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Prussian blue nanoparticles (PBNPs) were prepared by a self-assembly process on a glassy carbon electrode (GCE) modified with poly(o-phenylenediamine) (PoPD) film. The stepwise fabrication process of PBNP-modified PoPD/GCE was characterized using scanning electron microscopy and electrochemical impedance spectroscopy. The prepared PBNPs showed an average size of 70 nm and a homogeneous distribution on the surface of the modified electrode. The PBNPs/PoPD/GCE showed electrocatalytic activity towards the oxidation of pyridoxine (PN) and was used as an amperometric sensor. The modified electrode exhibited a linear response for PN oxidation over the concentration range 3-38.5 μM with a detection limit of ca 6.10 × 10 À7 M (S/N = 3) and sensitivity of 2.79936 × 10 3 mA M À1 cm À2 using an amperometric method. The mechanism and kinetics of the catalytic oxidation reaction of PN were investigated using cyclic voltammetry and chronoamperometry. The values of α, k cat and D were estimated as 0.36, 1.089 × 10 2 M À1 s À1 and 8.9 × 10 À5 cm 2 s À1, respectively. This sensor also exhibited good anti-interference and selectivity.

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Selective determination of pyridoxine in the presence of hydrosoluble vitamins using a continuous-flow solid phase sensing device with UV detection

Cited by 26 publications

References 13 publications

The Effect of Rare-Earth Elements on the Morphological Aspect of Borate and Electrocatalytic Sensing of Biological Compounds

The Effect of Rare-Earth Elements on the Morphological Aspect of Borate and Electrocatalytic Sensing of Biological Compounds

Solid Phase Molecular Spectroscopy

Sensitive amperometric pyridoxine sensor based on self‐assembled Prussian blue nanoparticle‐modified poly(o‐phenylenediamine)/glassy carbon electrode

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