scholarly journals Effect of graphite oxide and exfoliated graphite oxide as a modifier for the voltametric determination of dopamine in presence of uric acid and folic acid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Vidya ◽  
B. E. Kumara Swamy ◽  
S. C. Sharma ◽  
G. K. Jayaprakash ◽  
S. A. Hariprasad
Keyword(s):  
Uric Acid ◽  
Folic Acid ◽  
Graphite Oxide ◽  
Differential Pulse ◽  
Exfoliated Graphite ◽  
Infrared Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pulse Voltammetry

AbstractIn the present work, exfoliated graphite oxide (E-GO) was prepared by sonicating graphite oxide (GO) (prepared by modified Hummer’s and Offemam methods). Prepared GO and E-GO were characterized using infrared absorption spectroscopy, X-ray diffraction, and scanning electron microscopy. The electrocatalytic properties of GO and E-GO towards detection of dopamine (DA), uric acid (UA), and folic acid (FA) were investigated using cyclic voltammetry and differential pulse voltammetry. Our results revealed that E-GO has a slighter advantage over the GO as an electrode modifier for detection DA, UA, and FA, which might be ascribed to the good conductivity of E-GO when compared to the GO.

Electrocatalytic effect of nano-wrinkled layer carbonaceous electrode: determination of folic acid by differential pulse voltammetry

2019 ◽  
Vol 73 (6) ◽  
pp. 1369-1376 ◽  
Author(s):  
Aslı Erkal-Aytemur ◽  
İlknur Üstündağ ◽  
İshak Afşin Kariper ◽  
Mustafa Oğuzhan Çağlayan ◽  
Zafer Üstündağ
Keyword(s):  
Folic Acid ◽  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Electrocatalytic Effect ◽  
Pulse Voltammetry

Preparation and Characterization of Graphene by Oxidation-Reduction Method

2013 ◽  
Vol 807-809 ◽  
pp. 2805-2808
Author(s):  
Zhao Xia Hou ◽  
Yin Zhou ◽  
Shao Hong Wang ◽  
Mei Han Wang ◽  
Xiao Dan Hu ◽  
...  
Keyword(s):  
Graphite Oxide ◽  
Reduction Method ◽  
Graphene Nanosheets ◽  
Colloidal Suspension ◽  
Exfoliated Graphite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxidation Reduction ◽  
Ft Ir

Graphene was prepared by using hydrazine hydrate to reduce the exfoliated graphite oxide nanosheets in the aqueous colloidal suspension. The prepared graphene were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction analysis (XRD) and scanning electron microscope (SEM), respectively. The results showed that part of oxygen containing groups of the exfoliated graphite oxide nanosheets disappeared and the conjugated p bond recovered after reduction. The thickness and size of the graphene nanosheets decreased.

scholarly journals MODIFIKASI ELEKTRODA PASTA KARBON (EPK) MENGGUNAKAN GRAFENA OKSIDA (GO) UNTUK PENENTUAN BUTIL HIDROKSI ANISOL SECARA VOLTAMMETRI

2019 ◽  
Vol 3 (2) ◽  
pp. 84
Author(s):  
Ganjar Fadillah ◽  
Elsa Ninda Karlinda Putri ◽  
Syahna Febrianastutib
Keyword(s):  
Fourier Transform ◽  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infra Red ◽  
Pulse Voltammetry

Butil hidroksi anisol (BHA) merupakan senyawa aditif yang banyak ditemukan dalam sediaan bahan pangan dan memberikan efek karsinogenik pada jumlah yang besar. Mengingat pentingnya analisis senyawa tersebut dan regulasi yang cukup ketat maka pada penelitian ini telah dikembangkan metode analisis berbasis elektrometri yaitu modifikasi elektroda pasta karbon (EPK) dengan grafena oksida (GO) untuk meningkatkan sensitivitas pengukuran. GO dipreparasi menggunakan metode Hammer yang dimodifikasi dan dikarakterisasi menggunakan x-ray diffraction (XRD) dan fourier transform infra red (FTIR). Hasil pengukuran analit menggunakan differential pulse voltammetry (DPV) menunjukan bahwa adanya modifikasi tersebut dapat meningkatkan respon arus pengukuran yang dihasilkan dari 11,70 μA menjadi 31,21 μA dalam larutan BHA 0,5 mM dengan elektrolit pendukung PBS 0,1 M pH 7. Hasil uji hipotesis  menunjukkan bahwa adanya nilai beda yang signifikan antara EPK/GO dengan EPK tanpa modifikasi terhadap respon arus pengukuran analit BHA.

Sign in / Sign up

Export Citation Format

Share Document