Biomaterial Database

Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes. 2011

Xiaoqiang Liu, and Heqing Feng, and Xiuhua Liu, and Danny K Y Wong

Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, PR China.

A Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)|carbon nanotube composite electrode that shows strong catalytic and antifouling capability was developed to detect a series of phenolic endocrine compounds including bisphenol A, nonylphenol and ethynylestradiol. This electrode was fabricated by electropolymerizing NiTPPS complexes on a carbon nanotube-modified glassy carbon electrode. Optimized experimental parameters including a hydrodynamic potential of 0.7 V for flow injection analysis (FIA) and a NiTPPS surface coverage of 2.2 nmol cm(-2) (standard deviation 0.2 nmol cm(-2); n=6) were obtained for detection of the endocrine disrupting compounds. The sensor responded well to all the tested compounds with limits of detection ranging from 15 nmol L(-1) to 260 nmol L(-1) (based on three times S/N ratio) under FIA conditions. Both carbon nanotubes and NiTPPS account for the excellent performance of the composite modified electrode.

UI	MeSH Term	Description	Entries
D008665	Metalloporphyrins	Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilized for identification or quantitative estimation of porphyrins and porphyrin-bound compounds.	Metalloporphyrin
D010636	Phenols	Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.
D002384	Catalysis	The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.	Catalyses
D004566	Electrodes	Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.	Anode,Anode Materials,Cathode,Cathode Materials,Anode Material,Anodes,Cathode Material,Cathodes,Electrode,Material, Anode,Material, Cathode
D004997	Ethinyl Estradiol	A semisynthetic alkylated ESTRADIOL with a 17-alpha-ethinyl substitution. It has high estrogenic potency when administered orally, and is often used as the estrogenic component in ORAL CONTRACEPTIVES.	19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17alpha)-,Ethynyl Estradiol,Estinyl,Ethinyl Estradiol Hemihydrate,Ethinyl Estradiol, (8 alpha)-Isomer,Ethinyl Estradiol, (8 alpha,17 alpha)-Isomer,Ethinyl Estradiol, (8 alpha,9 beta,13 alpha,14 beta)-Isomer,Ethinyl Estradiol, (9 beta,17 alpha)-Isomer,Ethinyl-Oestradiol Effik,Ethinylestradiol Jenapharm,Ethinyloestradiol,Lynoral,Microfollin,Microfollin Forte,Progynon C,Estradiol, Ethinyl,Estradiol, Ethynyl,Ethinyl Oestradiol Effik,Hemihydrate, Ethinyl Estradiol,Jenapharm, Ethinylestradiol
D001559	Benzhydryl Compounds	Compounds which contain the methyl radical substituted with two benzene rings. Permitted are any substituents, but ring fusion to any of the benzene rings is not allowed.	Diphenylmethyl Compounds,Compounds, Benzhydryl,Compounds, Diphenylmethyl
D017022	Flow Injection Analysis	The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample downstream where mixing occurs in a coiled tube, then passes into a flow-through detector and a recorder or other data handling device.	Analysis, Flow Injection,Analyses, Flow Injection,Flow Injection Analyses,Injection Analyses, Flow,Injection Analysis, Flow
D055664	Electrochemical Techniques	The utilization of an electrical current to measure, analyze, or alter chemicals or chemical reactions in solution, cells, or tissues.	Electrochemical Technics,Electrochemical Technic,Electrochemical Technique,Technic, Electrochemical,Technics, Electrochemical,Technique, Electrochemical,Techniques, Electrochemical
D037742	Nanotubes, Carbon	Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY.	Buckytubes,Carbon Nanotubes,Nanoribbons,Buckytube,Carbon Nanotube,Nanoribbon,Nanotube, Carbon