Zeolite Nanoparticle Modified Carbon Paste Electrode as a Biosensor for Simultaneous Determination of Dopamine and Tryptophan

Khalilzadeh, Balal; Hasanzadeh, Mohammad; Bahareh, Bakhoday; Ali, Babaei; Hajjizadeh, M.; Mozhgan, Zendehdel

doi:10.1002/jccs.200900117

Cited by 34 publications

(8 citation statements)

References 48 publications

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“…Peningkatan arus puncak terjadi akibat peningkatan jumlah transfer elektron dari AA yang dimediasi oleh dibenzo-18-crown-6. Penurunan arus puncak pada konsentrasi dibenzo-18-crown-6 lebih dari 0,6 % disebabkan makin tinggi konsentrasi dibenzo-18crown-6 akan menutupi grafit sehingga konduktivitasnya menurun (Balal et al, 2009). Penurunan ini juga bisa disebabkan karena berkurangnya jumlah grafit di permukaan elektroda dengan penyisipan dibenzo-18-crown-6.…”

Section: Pendahuluanunclassified

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

2016

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In this research, the modified carbon paste electrode with crown ether (dibenzo-18-crown-6) has been prepared, for determination of ascorbic acid. Some of parameters observed were optimization of crown ether composition in carbon paste, pH of solution, linear concentration range, limit of detection, reproducibility, and recovery. The optimum performance of the prepared electrode was applied for determination of commercialsampleswhich contain of ascorbic acid. The result of this research showsthat the optimum composition of crown ether in carbon paste is 0.6 % at pH 4. Linear range of concentration obtained is from 2 - 200 μM. The detection limit and percentage of recovery are 1.243 μM and 101.31 %, respectively. The modified electrode has HorRat value less than 2, it indicates a good reproducibility. Analysis of 4 commercial samples which contain of ascorbic acid were in agreement with the content listed in the label with the suitability of 94 - 100 %.

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Section: Pendahuluanunclassified

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

2016

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“…Penurunan arus puncak pada konsentrasi dibenzo-18-crown-6 lebih dari 0,6 % disebabkan makin tinggi konsentrasi dibenzo-18-crown-6 akan menutupi grafit sehingga konduktivitasnya menurun (Balal et al, 2009). …”

Section: Pembahasan Penentuan Komposisi Optimum Modifier Eter Mahkotaunclassified

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

2016

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ABSTRAKPada penelitian ini telah dibuat elektroda pasta karbon yang dimodifikasi eter mahkota untuk analisis asam askorbat, menggunakan metode voltametri. Parameter yang diamati meliputi optimasi komposisi eter mahkota dalam pasta karbon, optimasi pH larutan, rentang konsentrasi linear dan limit deteksi pengukuran, keberulangan (presisi), dan penentuan persen perolehan kembali (akurasi). Elektroda pasta karbon termodifikasi eter mahkota pada kondisi pengukuran optimum digunakan untuk menentukan kadar sampel yang mengandung vitamin C yang beredar di pasaran. Hasil penelitian menunjukkan bahwa konsentrasi eter mahkota optimum adalah 0,6 % dari berat grafit dan pH larutan optimum pada pH 4. Rentang konsentrasi linear diperoleh dari 2 -200 μM, dengan limit deteksi 1,243 μM, persen perolehan kembali sebesar 101,31 %, dan keberulangan hasil pengukuran yang baik yang ditunjukkan oleh nilai HorRat lebih kecil dari 2. Analisis 4 macam sampel vitamin C yang beredar di pasaran memberikan kesesuaian hasil antara 94 -100 %. Kata kunci: asam askorbat, elektroda pasta karbon, eter mahkota, voltametri pulsa diferensial ABSTRACTIn this research, the modified carbon paste electrode with crown ether (dibenzo-18-crown-6) has been prepared, for determination of ascorbic acid. Some of parameters observed were optimization of crown ether composition in carbon paste, pH of solution, linear concentration range, limit of detection, reproducibility, and recovery. The optimum performance of the prepared electrode was applied for determination of commercialsampleswhich contain of ascorbic acid. The result of this research showsthat the optimum composition of crown ether in carbon paste is 0.6 % at pH 4. Linear range of concentration obtained is from 2 -200 μM. The detection limit and percentage of recovery are 1.243 μM and 101.31 %, respectively. The modified electrode has HorRat value less than 2, it indicates a good reproducibility. Analysis of 4 commercial samples which

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“…Many electrochemical proce dures have been developed for the determination of Trp using carbon nanotubes [7,8] and polymer film [9,10] modified glassy carbon electrodes, boron doped diamond electrode [11] and butyrylcholine modified glassy carbon electrode [12]. Recent researches indicate that carbon paste modified elec trodes [13][14][15][16] show good reproducibility and high sensitivity for Trp determination, especially when incorporated with nanoparticles [16,17]. Nano SiO 2 , a typical inorganic nanomaterial, has been considered as interesting materials for electrode modification due to its numerous convenient properties including good biocompatibility, non toxicity, thermal stability and excellent electrical properties [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of tryptophan based on silicon dioxide nanopartilces modified carbon paste electrode

2012

Russ J Electrochem

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Silicon dioxide nanoparticles modified carbon paste electrode was fabricated and used for electro chemical investigation of tryptophan. Compared with the unmodified electrode, the peak current significantly increased. Experimental conditions for tryptophan determination were optimized. Linear relationship between the peak current and tryptophan concentration was obtained in the range of 1.0 × 10 -7 -5. 0 × 10 -6 mol L -1 and 5.0 × 10 -6 -5. 0 × 10 -5 mol L -1 with an estimated detection limit of 3.6 × 10 -8 mol L -1 (S/N = 3). Tryptophan in pharmaceutical and human serum samples were successfully determined by the proposed method.

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Zeolite Nanoparticle Modified Carbon Paste Electrode as a Biosensor for Simultaneous Determination of Dopamine and Tryptophan

Cited by 34 publications

References 48 publications

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

Modification of Carbon Paste Electrode With Crown Ether (Dibenzo-18-Crown-6) for Ascorbic Acid Analysis Using Differential Pulse Voltammetry Method

Electrochemical determination of tryptophan based on silicon dioxide nanopartilces modified carbon paste electrode

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