Yazar "Yola, Mehmet L." seçeneğine göre listele

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    Fabrication of highly sensitive nitrite electrochemical sensor in foodstuff using nanostructure sensor
    (Esg, 2017) Gupta, Vinod Kumar; Khalilzadeh, Mohammad A.; Rudbaraki, Ali; Agarwal, Shilpi; Yola, Mehmet L.; Atar, Necip
    In this research, we introduced a powerful electrochemical sensor (based carbon paste electrode) for analysis of nitrite in foodstuff, using CdO decorated single wall carbon nanotube incorporated with 1-methyl-3-butylimidazolium bromide (CdO/SWCNTs/1-3-MBIB/CPE). Our results revealed that CdO/SWCNTs/1-3-MBIB/CPE shows excellent electro-catalytic activity towards electro-oxidation of nitrite. The obtained data illustrated an irreversible oxidation peak current at 0.92 V, pointing to the oxidation of nitrite. The CdO/SWCNTs/1-3-MBIB/CPE exhibited a linear response from 0.1 mu M to 900.0 mu M of nitrite with no interfering from other food compounds. The CdO/SWCNTs/1-3-MBIB/CPE has been used for determination of nitrite in real samples.
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    Öğe
    Fabrication of novel electrochemical sensor for determination of vitamin C in the presence of vitamin B9 in food and pharmaceutical samples
    (Elsevier Science Bv, 2016) Khaleghi, Fatemeh; Arab, Zahra; Gupta, Vinod Kumar; Ganjali, M. R.; Norouzi, Parviz; Atar, Necip; Yola, Mehmet L.
    Synthesis and application of NiO-multiwall carbon nanotube nanocomposite (NiO/MWCNTs) and 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) in the carbon paste matrix as high sensitive sensors for voltammetric determination of vitamin C have been reported. The oxidation peak potential of vitamin C at the surface of the ([Bmim]BF4) NiO/MWCNT carbon paste electrode (NiO/MWCNTs/([Bmim]BF4/CPE) appeared at 440 mV, which was about 200 mV lower than the oxidation peak potential at the surface of the simple carbon paste electrode under a similar condition. Also, the oxidation peak current was increased for about 3.7 times at the surface of NiO/MWCNTs/([Bmim]BF4/CPE compared to carbon paste electrode. At an Optimum,condition (pH 7.0), the two peaks are separated ca. 0.44 and 0.85 V for vitamin C and vitamin B-9. This point shows that vitamin C can be determined in the presence of vitamin B-9. The linear response range and detection limit were found to be 0.1-1000 mu M and 0.06 mu M, respectively. The proposed sensor was successfully applied, for the determination of vitamin C in food and drug samples. (C) 2016 Elsevier B.V. All rights reserved.