HOME / PUBLICATIONS /

Publications by Year: 1993

1993
Turyan I, Mandler D. Electrochemical mercury detection. Nature (London)Nature (London, United Kingdom). 1993;362 (6422) :703 - 4.Abstract
Selective detn. of ultra low levels of mercury (<10-12M) is described using a glassy carbon electrode spin coated with 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane (Kryptofix-222). The electrode was used for the detn. of mercury in sea water by anodic stripping voltammetry. [on SciFinder(R)]
Kaminsky A, Willner I, Mandler D. A reference electrode for organic solvent based on modified polyethylenimine loaded with ferricyanide/ferrocyanide. J. Electrochem. Soc.Journal of the Electrochemical Society. 1993;140 (3) :L25-L27.Abstract
A cross-linked polymer composed of polyethylenimine (PEI) reacted with 1,4-dibromobutane coated on a glassy C electrode (GCE) and contg. neg. charged ions, Fe(CN)63-/4-, is proposed as a ref. electrode in org. solvents. The system exhibits a relatively stable potential (±10 mV) over a period of several days in MeCN and a reasonable potential stability for several hours in DMF and CH2Cl2. The different parameters that affect the behavior of the GCE/PEI/Fe(CN)63-/4- are characterized. [on SciFinder(R)]
Malem F, Mandler D. Self-assembled monolayers in electroanalytical chemistry: application of ω-mercapto carboxylic acid monolayers for the electrochemical detection of dopamine in the presence of a high concentration of ascorbic acid. Anal. Chem.Analytical Chemistry. 1993;65 (1) :37 - 41.Abstract
Self-assembled monolayers of ω-mercapto carboxylic acids, HS(CH2)nCO2H (n = 2, 5, 10), Cm on gold electrodes were used as a means to induce electrochem. differentiation between a neurotransmitter, dopamine, and ascorbic acid. Optimum differentiation is found for n = 5, and it is attributed to a compromise between a well-organized system that requires long ω-mercapto carboxylic acids and a reasonable rate of electron transfer which is obsd. with short ω-mercapto carboxylic acids. [on SciFinder(R)]
Turyan I, Mandler D. Electrochemical determination of trace amounts of gold(III) by anodic stripping voltammetry using a chemically modified electrode. Anal. Chem.Analytical Chemistry. 1993;65 (15) :2089 - 92.Abstract
An electrochem. pretreated glassy carbon electrode (GCE) modified with an aza crown ether, 8,9,17,18-dibenzo-1,7-dioxa-10,13,16-triazacyclooctadecane (DDTC), has been used for the very sensitive and selective anal. of trace amts. of gold(III). A detection limit of 4.2 × 10-10 M was obtained by applying anodic stripping voltammetry. The parameters that affect the sensitivity and possible interferences by other ions have been examd. in detail. The modified electrodes exhibit high stability and, therefore, have been used repeatedly without mech. regeneration. Finally, the method has been successfully applied to det. gold traces in a geol. sample. [on SciFinder(R)]
Turyan I, Mandler D. Electrochemical mercury detection. Nature (London)Nature (London, United Kingdom). 1993;362 (6422) :703 - 4.Abstract
Selective detn. of ultra low levels of mercury (<10-12M) is described using a glassy carbon electrode spin coated with 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane (Kryptofix-222). The electrode was used for the detn. of mercury in sea water by anodic stripping voltammetry. [on SciFinder(R)]