Determination of isoniazid in human urine using screen-printed carbon electrode modified with poly-l-histidine

Bergamini, Márcio F.; Santos, Daniela Pereira dos; Zanoni, María Valnice Boldrin

doi:10.1016/j.bioelechem.2009.07.010

Cited by 80 publications

(28 citation statements)

References 36 publications

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“…The electrode exhibited a catalytic effect with the electrochemical reduction of INZ occurring at less negative potentials and with an increased peak current compared to the non-modified SPE. The electrochemical behavior of the modified carbon-based SPE was investigated by cyclic, linear sweep (LSV), DPV, SWV, and electrochemical impedance spectroscopy (EIS) [59].…”

Section: Membrane/filmmentioning

confidence: 99%

Screen-Printed Electrodes (SPE) for Drug Compounds Determination

Özkan

Kauffmann

Zuman

2015

Monographs in Electrochemistry

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Section: Membrane/filmmentioning

confidence: 99%

Screen-Printed Electrodes (SPE) for Drug Compounds Determination

Özkan

Kauffmann

Zuman

2015

Monographs in Electrochemistry

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“…The recoveries achieved for 0.5 x 10 -6 , 1.0 x 10 -6 and 2.0 x 10 -6 molL -1 RB5 dye were from 83.97 ± 4.78 to 97.93 ± 5.45%, 95.91 ± 2.68 to 103.49 ± 1.32% and 99.17 ± 0.75 to 105.12 ± 0.28%, respectively. According to the t-test (two-tailed), there were no significant differences between the recovery and spiked value at the 95% confidence level with degree of freedom (n-1=2), since all the calculated t values in the experiment were lower than the theoretical t value, which was 4.303 [50,51]. These good recovery values indicated that the matrixes did not affect the determination of RB5 dye in batik wastewater samples and it was suggested that the developed method can be applied for RB5 dye determination in the batik wastewater samples without any sample pretreatment.…”

Section: Determination Of Rb5 Dye In Wastewaters Collected From the Bmentioning

confidence: 99%

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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“…Como consequência, têm mostrado alta versatilidade de aplicações, tanto na forma de eletrodo convencional, quanto na forma de eletrodo modificado. [21][22][23][24][25][26][27][28][29][30][31][32][33] Ademais, dependendo da aplicação, esses eletrodos podem ser empregados muitas vezes, barateando ainda mais o custo das determinações analíticas.…”

Section: Os Eletrodos De Mercúrio (Dme -Dropping Mercury Electrode Hunclassified

Construção e aplicação de um minissensor de filme de bismuto utilizando materiais de baixo custo para determinações voltamétricas in loco

Figueiredo-Filho¹,

Janegitz²,

Faria³

et al. 2012

Quím. Nova

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Determination of isoniazid in human urine using screen-printed carbon electrode modified with poly-l-histidine

Cited by 80 publications

References 36 publications

Screen-Printed Electrodes (SPE) for Drug Compounds Determination

Screen-Printed Electrodes (SPE) for Drug Compounds Determination

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

Construção e aplicação de um minissensor de filme de bismuto utilizando materiais de baixo custo para determinações voltamétricas in loco

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