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L-cysteine functionalized multiwalled carbon nanotubes sensor for lead detection/Oh Chun Keat

L-cysteine functionalized multiwalled carbon nanotubes sensor for lead detection_Oh Chun Keat_K4_2011_875003838_NI

Abstract Satu voltametri perlucutan beranod dijalankan untuk pengesanan ion plumbum (II) dengan menggunakan L-Cysteine difungsikan tiub-nano karbon berdinding lapis sebagai pengesan. L-Cysteine ialah sejenis acid amino dengan affiniti yang kuat terhadap sesetengah logam berat. Dalam eksperimen, ion plumbum pertamanya diakumulasikan di permukaan pengesan L-Cysteine yang difungsikan tiub-nano karbon. Seterusnya, perlucutan beranod secar pembezaan pulsa dijalankan. Puncak arus yang didapati adalah berkadar langsung terhadap konsentrasi ion plumbum. Optima masa redusi, masa akumulasi and potensi redusi yang didapati adalah 5 minit, 10 minit dan 1.0V masing-masing. Kalibrasi dijalankan dengan berbeze puncak arus yang dihasilkan daripda konsentrasi ion plumbum(II). Kestabilan sensor turut dikaji dan didapati bahawa puncak arus telah berkurang sebanyak 8% dalam tiga minggu. Katakunci: Ion plumbum (II), L-Cysteine, Tiub-nano karbon berdinding lapis, perluctan beranodic secara pembezaan pulsa. L-Cysteine Functionalized Multiwalled Carbon Nanotubes Based Sensor for Lead Detection ___________________________________________________________________________________ An anodic stripping voltammetry is carried out for the determination of lead (II) ion by using L-Cysteine functionalized multiwalled carbon nanotubes as the sensor. LCysteine is an amino acid with high affinities towards some heavy metals. In the experiment, the lead ion is firstly accumulated on the surface of the L-Cysteine functionalized carbon nanotubes sensor. After that, a differential pulse anodic stripping voltammetry is carried out. The resulting peak currents were linearly related to the concentrations of the lead ions. The optimum reduction time, accumulation time and reduction potential are 5 minutes, 10 minutes and -1.0V respectively. A calibration is done based on different peak height that is generated by the concentration of the lead (II) ion. The stability of the sensor is also studied and found out that the peak height is reduced by 8% in three weeks.

Contributor(s): Oh Chun Keat - Author Primary Item Type: Final Year Project Identifiers: Accession Number : 875003838 Language: English Subject Keywords: Lead(II) ion, L-Cysteine ; Multiwalled carbon nanotubes ; Differential pulse anodic stripping First presented to the public: 4/1/2011 Original Publication Date: 8/27/2020 Previously Published By: Universiti Sains Malaysia Place Of Publication: School of Chemical Engineering Citation: Extents: Number of Pages - 56 License Grantor / Date Granted:   / ( View License ) Date Deposited 2020-08-27 11:21:36.635 Submitter: Nor Hayati Ismail

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