Copper sensors

It is well known that copper ion (Cu +) is able to quench Eu(III) emission. Recently, the Eu(III)-cyclen-p/ien conjugate Eu-1 (Eigure 13.5) has been reported as a luminescent copper sensor. The addition of Cu + to the solution of Eu-1 at pH 7.4 induced the quenching of Eu(III) luminescence at 615nm [36]. 

Gunnlaugsson, T., Leonard, J.R, Senechal, K., and Harte, A.J. (2004) Eu(lll)-cyclen-phen conjugate as a luminescent copper sensor the formation of mixed polymetallic macrocyclic complexes in water. Chemical Communications, 782-783. 

M is conq>arable to the detection limits diat have been reported elsewhere for L-cysteine-modified surfiice-based copper sensors (20-23). The effect of e qwsure of the L-cysteine modified cantilever to die ions Na Pb Zia , Cd, Ni and Ca % at a concentration of 10 M, on cantilever deflection was studied. None of diese cations caused much deflection of die cantilever, while the response to Cu was significant. This suggested that this L-cysteine modified cantilever was a good Cu sensor with both high sensitivity and selectivity. 

Figure 10.30 Comparison between the measured S-parameters of textile and copper sensors. From Zhang et al. (2012), 2012 IEEE.

Liu G, Nguyen QT, Chow E, Bocking T, Hibbert DB, Gooding JJ (2006) Study of factors affecting the performance of voltammetric copper sensors based on Gly-Gly-His modified glassy carbon and gold electrodes. Electroanalysis 18 1141-1151... 

Optical Fibers. Pure and doped fused siHca fibers have replaced copper lines in the telecommunication area. Eused siHca fibers are used in laser surgery, optical sensor appHcation, and laser welding (see Sensors). Optical-fiber-tethered weapons such as fiber-optics-guided (EOG) missiles are another potential appHcation for fused siHca (249,250) (see Eiberoptics). 

Qin, W., Zhang, Z., and Liu, H., Chemiluminescence flow-through sensor for copper based on anodic stripping voltammetric flow cell and ion-exchange column with immobilized reagents., Anal. Chem., 70, 3579, 1998. 

Chemical structure of the Zincon- Response of a Zincon-based sensor membrane tetraoctylammonium ion pair to different pM concentrations of copper(II) at... 

When the Zincon ion-pair is exposed to an aqueous sample containing the analyte, the latter diffuses into the sensor membrane to react with the indicator, and gives a colour transition from pink to blue at near neutral pH. The pKa value of Zincon for the color transition from pink to blue is above 13, therefore, the sensor membrane is virtually insensitive to pH changes. However, due to the high complexation constant of Zincon for copper and zinc, the response of sensor membrane is irreversible and must be evaluated kinetically12. 

R. Garjonyte and A. Malinauskas, Operational stability of amperometric hydrogen peroxide sensors, based on ferrous and copper hexacyanoferrates. Sens. Actuators, B B56, 93—97 (1999). 

The copper flow-through CL sensor comprised an anion-exchange column having luminol and cyanide coimmobilized on the resin, while copper was temporarily retained by electrochemical preconcentration on a Au electrode placed in an anodic stripping voltammetric cell [64], Injection of 0.1 mol/L NaOH through the column eluted the reagents, which then reacted with copper, stripped from the electrode to produce a CL signal. The response was linear in the 0.01-10-pg/L... 

Keith, J. Hess, L. C. Spendel, W. U. Cox, J. A. Pacey, G. E., The investigation of the behavior of a long period grating sensor with a copper sensitive coating fabricated by layer by layer electrostatic adsorption, Talanta 2006, 70, 818 822... 

Black-and-white photography, fixation in, 19 213 Blackbody color of, 7 327 emittance from, 19 131-132 spectral radiance of, 24 453 Blackbody radiation law, 24 452 Blackbody responsivity, 19 132 Blackbody temperature sensor, 11 149-150 Black-box approach, to reliability modeling, 26 987-988, 990 Black copper, 16 144 Black crappie, common and scientific names, 3 187t... 

Extrinsic detectors, 22 180 Extrinsic fiber-optic sensors, 11 148 Extrinsic photoconductors, 19 138 Extrinsic semiconductors, 22 236-237 Extrinsic wastes, 10 68 Extruded food packaging, 18 45 Extruded lead-copper alloys, 14 776 Extruded lead-tellurium alloys, 14 778 Extruded rigid foam, 23 404-405 Extruders... 

T. Mayr, I. Klimant, O.S. Wolfbeis and T. Werner, Dual lifetime referenced optical sensor membrane for the determination of copper(II) ions, Anal. Chim. Acta, 462(1) (2002) 1-10. 

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