TITLE

A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations

AUTHOR(S)
Marzouk, Sayed A. M.; Al-Ariqui, Wadie T.; Hassan, Saad S. M.
PUB. DATE
April 2003
SOURCE
Analytical & Bioanalytical Chemistry;Apr2003, Vol. 375 Issue 8, p1186
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Preparation, characterization, and applications of a 1,10-phenanthrolinium cation (phenH+)-sensitive potentiometric sensor are described. The sensor incorporates a liquid polymeric membrane consisting of phenH-tetraphenylborate, nitrophenyloctyl ether, and poly(vinyl chloride) as ion exchanger, plasticizer, and polymeric support, respectively. The sensor exhibits a fast and Nernstian response to phenH+ over the concentration range of 6×10-6–2×10-4 M with a monovalent cationic slope of 58.0±0.5 mV/log[phenH+] in acetate buffer of pH 4.2. The sensor is successfully applied to the monitoring of the potentiometric titration of Hg(II) and Cu(II) ions with phen solution in the presence of citrate and acetate buffers of pH 4.2, respectively. Sharp inflection breaks (90–180 mV) at 1:1 (metal:phen reaction) are obtained in the presence of chloride and thiocyanate background. This stoichiometry is explained by the formation of insoluble [HgCl2(phen)], [Hg(SCN)2(phen)], and [Cu(SCN)2(phen)] complexes. Optimization of each titration and the effect of foreign ions are evaluated. The method offers the advantages of adequate sensitivity, accuracy, and selectivity for the determination of mercury and copper in pharmaceutical, rock, and tea samples. The results are in good agreement with those obtained using the standard atomic absorption spectrometric and United States Pharmacopeial methods.
ACCESSION #
15125601

 

Related Articles

  • COPPER, IRON, SELENIUM, ZINC AND MAGNESIUM CONCENTRATIONS IN OYSTERS (ostrea edulis) FROM THE CROATIAN ADRIATIC COAST. Bilandžić, Nina; Sedak, Marija; Ɖokić, Maja; Zrnčić, Snježana; Oraić, Dražen; Varenina, Ivana; Kolanović, Božica Solomun; Božić, Ɖurđica // Slovenian Veterinary Research;2014, Vol. 51 Issue 3, p147 

    The aim of the study was to determine and compare the concentrations of essential elements (Cu, Fe, Se and Zn) and the macronutrient Mg in oysters (Ostrea edulis) from six different farming sites along the Croatian Adriatic coast. This is the first study to determine the accumulation of Cu, Fe,...

  • Oxygen Removal from Blister Copper by Copper Oxide Formation. Coursol, P.; Davis, B.; Roy, A.; Lebel, M. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Jul2005, Vol. 57 Issue 7, p64 

    In this study, an alternative approach is proposed to remove oxygen from blister copper through copper oxide formation. The addition of fluxes promotes both the copper oxide formation and oxygen reduction in molten copper. Fundamental aspects of this proposed process are described in this...

  • Influence of surface and grain-boundary scattering on the resistivity of copper in reduced dimensions. Wu, W.; Brongersma, S. H.; Van Hove, M.; Maex, K. // Applied Physics Letters;4/12/2004, Vol. 84 Issue 15, p2838 

    We examine the influence of surface and grain-boundary scattering on the total electrical resistivity of copper as dimensions are reduced close to the bulk electron mean free path (39 nm). Through resistivity and grain size characterization on copper wires with sizes down to 95×130 nm2 in a...

  • Finite Element Modeling on the Compaction of Copper Powder Under Different Conditions. An, Xizhong; Zhang, Yilei; Zhang, Yuxi; Yang, Shuo // Metallurgical & Materials Transactions. Part A;Aug2015, Vol. 46 Issue 8, p3744 

    Single-action die compaction of copper powders with initial loose natural packing and vibrated random dense packing structures was carried out numerically by finite element method and physically for validation. Furthermore, the compaction under various cyclic loadings was modeled to identify its...

  • Mixed messages in iron oxide–copper–gold systems of the Cloncurry district, Australia: insights from PIXE analysis of halogens and copper in fluid inclusions. Timothy Baker; Roger Mustard; Bin Fu; Patrick Williams; Guoyi Dong; Louise Fisher; Geordie Mark; Chris Ryan // Mineralium Deposita;Aug2008, Vol. 43 Issue 6, p599 

    Abstract  Proterozoic rocks of the Cloncurry district in NW Queensland, Australia, are host to giant (tens to hundreds of square kilometers) hydrothermal systems that include (1) barren regional sodic–calcic alteration, (2) granite-hosted hydrothermal complexes with...

  • Cu-intercalated (Bi0.5Sb1.5Te3)0.96(Bi2Se3)0.04 single crystals. Korzhuev, M. A.; Ivanova, L. D. // Inorganic Materials;Jul2006, Vol. 42 Issue 7, p712 

    A procedure is described for converting the conductivity type ( p → n) of single crystals of the Bi0.5Sb1.5Te3-4 mol % Bi2Se3 solid solution via copper intercalation. Using this procedure, we have produced high-performance single-crystal n-legs with a room-temperature thermoelectric power...

  • Structure and Mechanical Properties of Thick Copper Coating Made by Cold Spray. Maev, R.; Leshchynsky, V.; Strumban, E.; Dzhurinskiy, D.; Kocimski, J.; Maeva, E. // Journal of Thermal Spray Technology;Jan2016, Vol. 25 Issue 1/2, p113 

    The main purpose of this study was to form cold-sprayed copper coatings on A 516 low carbon steel, which is considered a prospective material for manufacturing used nuclear fuel containers. The 3 mm-thick Cu coatings were formed using the high pressure cold spray method with Nitrogen as the...

  • copper (Cu):. Schlegel, Rolf H. J. // Encyclopedic Dictionary of Plant Breeding & Related Subjects;2003, p107 

    The article presents an encyclopedia entry for the term "copper" is presented. It refers to a malleable ductile metallic element having a characteristic reddish brown color. As a trace element it is needed by plants. Copper deficiency in the body ca

  • Influence of Reflow and Thermal Aging on the Shear Strength and Fracture Behavior of Sn-3.5Ag Solder/Cu Joints. Deng, X.; Sidhu, R. S.; Johnson, P.; Chawla, N. // Metallurgical & Materials Transactions. Part A;Jan2005, Vol. 36 Issue 1, p55 

    The mechanical behavior of Sn-rich solder/Cu joints is highly sensitive to processing variables such as solder reflow time, cooling rate, and subsequent thermal aging. In this article, we focus on the lap shear behavior of Sn-3.5Ag/Cu joints as a function of solder yield strength and...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics