Electrochemical analysis of the alanine phenylthiohydantoin derivative by cathodic stripping voltammetry

Vilaseca, C.; Quintana, M. C.; Vicente, J.; Hernández, Pedro; Hernández, L.

doi:10.1016/j.ab.2008.04.046

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…The results showed that the E p of RB5 dye was shifted to the more negative potentials with the increased pH indicating that the electron transfer was accompanied by proton transfer in the reduction process [23,24]. The reduction process was easier to take place in a medium rich with H + ions and more difficult in a medium with low H + ions [25] and the reduction process of RB5 dye was pH dependent [26,27].…”

Section: Results and Discussion Electrochemical Behaviour Of The Rb5 Dyementioning

confidence: 81%

Voltammetric Determination of Reactive Black 5 (Rb5) in Waste Water Samples From the Batik Industry

Yaacob¹

2016

MJAS

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A cyclic voltammetry (CV) and differential pulse cathodic stripping voltammetry (DPCSV) studies of RB5 in Britton-Robinson buffer (BRB) at a hanging mercury dropping electrode (HMDE) are described. CV was carried out by cathodic and anodic potential scan over the range of +200 mV to -800 mV with no accumulation time and three well-defined pH-dependent cathodic peaks were observed. The effects of different scan rates, pH of BRB, repetitive cycle and increasing concentrations on the peak height and peak potential of the analyte were studied. The results showed that RB5 dye was adsorbed and irreversibly reduced at the mercury electrode, mainly under diffusion controlled in the optimum pH 4.0 of BRB. By using DPCSV, pH of BRB and various instrumental parameters such as scan rate, accumulation time, accumulation potential and pulse amplitude that may affect the peak height of RB5 were investigated and optimized for RB5 determination. Under the optimized parameters, the peak height was found to be linear with RB5 concentration in the range from 2.5 x 10 -7 mol L -1 to 2.0 x 10 -6 mol L -1 . A detection limit (3SD/m) of 1.3 x 10 -8 mol L -1 was achieved. The precision of the developed method in terms of RSD was 0.55% for intra-day measurement and 0.55%, 0.24% and 0.40%, for inter-day measurements, respectively. The developed method was successfully applied in the determination of RB5 in batik wastewaters with the mean recovery of 83.97 ± 4.78% to 97.93 ± 5.45% (0.5 x 10 -6 mol L -1 ), 95.91 ± 2.68% to 103.49 ± 1.32% (1.0 x 10 -6 mol L -1 ) and 99.17 ± 0.75% to 105.12 ± 0.28% (2.0 x 10 -6 mol L -1 ). The developed method is considered sensitive, precise, accurate, rugged, robust, fast and low cost for routine analysis of RB5 dye in batik wastewaters over the UV-VIS spectrometry method.Keywords: Reactive Black 5, differential pulse cathodic stripping, Britton-Robinson buffer, hanging mercury dropping electrode, batik wastewater samples Abstrak Kajian voltammetri berkitar (CV) dan voltammetri perlucutan denyut kebezaan (DPCSV) terhadap pewarna RB5 dalam larutan penimbal Britton-Robinson (BRB) menggunakan elektrod jatuhan raksa tergantung (HMDE) dihuraikan. CV dijalankan dengan mengimbas potential kathodik dan anodik dari +200 mV ke -800 mV tanpa masa pengumpulan dan tiga puncak diperhatikan selepas imbasan. Kesan perbezaan kadar imbasan, pH BRB, imbasan berkitar yang berulang dan peningkatan kepekatan RB5 ke atas ketinggian dan nilai keupayaan puncak dikaji. RB5 yang dijerap dan diturunkan secara tidak berbalik pada permukaan elektrod merkuri adalah dibawah kawalan difusi pada pH BRB yang optimum iaitu 4.0. Dengan menggunakan DPCSV, pH BRB dan parameter-parameter peralatan yang memberi kesan kepada ketinggian puncak seperti kadar imbasan, masa pengumpulan, keupayaan pengumpulan dan amplitud denyut telah dioptimumkan untuk analisis RB5. Ketinggian puncak berkadar terus dengan kepekatan RB5 dalam julat dari 2.5 x 10 -7 mol L -1 hingga 2.0 x 10 -6 mol L -1 . Had pengesanan adalah 1.3 x 10 -8 mol L -1 . Ketepatan (RSD...

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Section: Results and Discussion Electrochemical Behaviour Of The Rb5 Dyementioning

confidence: 81%

Voltammetric Determination of Reactive Black 5 (Rb5) in Waste Water Samples From the Batik Industry

Yaacob¹

2016

MJAS

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Estimation of the Antioxidative Properties of Amino Acids - an Electrochemical Approach

Masek

Chrześcijańska

Zaborski

2014

International Journal of Electrochemical Science

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Electrochemical analysis of the alanine phenylthiohydantoin derivative by cathodic stripping voltammetry

Cited by 2 publications

References 27 publications

Voltammetric Determination of Reactive Black 5 (Rb5) in Waste Water Samples From the Batik Industry

Voltammetric Determination of Reactive Black 5 (Rb5) in Waste Water Samples From the Batik Industry

Estimation of the Antioxidative Properties of Amino Acids - an Electrochemical Approach

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