نتایج جستجو برای: coulometry
تعداد نتایج: 183 فیلتر نتایج به سال:
The proposed recommendation for measuring and reporting chloride in undiluted plasma or blood by ion-selective electrodes (ISEs) will provide results that are identical to chloride concentrations measured by coulometry for standardized normal plasma or blood samples. It is applicable to all current ISEs dedicated to chloride measurement in undiluted samples that meet the requirements. However, ...
The Journal of Physical Chemistry is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Secondary Reactions in Controlled Potential Coulometry. IV. Reversal Coulometry and Following Chemical Reactions Allen J. Bard, and Shankar V. Tatwawadi J. Phys. Chem., 1964, 68 (9), 2676-2682• DOI: 10.1021/j100791a050 • Publication Date (Web): 01 May 2002 Downloaded...
Not only are the quantities of emerging precision cleaning agents, equipment, and processes staggering, but assessing their level of performance relative to previous approaches presents even greater challenges. As en vironmentally harmful cleaning solvents are phased out and replaced, the quest for implementing alternative technologies raises numerous questions: l What alternative cleaning agen...
Coulometry has been established as an important and reliable method for the determination of acidic compounds. The analytical method and simple apparatus described here arc applied to the precise and accurate determination of sulfur dioxide in nitrogen, specifically in compressed gas cylinders at nominal concentrations of 50 and 100 µmol/mol (ppm). This method is constant current coulometry whe...
A systematic study on the electrochemical behavior of the S-derivatives of 2-amino cyclopentene-1-dithiocarboxylic acid (ACDA) has been carried out in aqueous ethanolic solutions by means of polarography, coulometry and voltammetry. All the compounds studied exhibited a well defined anodic wave corresponding to a diffusion controlled process. Controlled potential coulometry gave n=1 per mol...
Controlled potential coulometry is a powerful tool in electroanalysis due to its ability to directly derive the quantity or electron stoichiometry of a substance without use of a calibration curve [1]. The technique has also been employed for mechanistic considerations; however, the general long experimental times (minutes to hours) are not conducive to such studies because of possible follow-u...
Derivatives of quinoxalin-2-one are interesting compounds with potential pharmacological activity. From this point of view, understanding of their electrochemical behavior is of great importance. In the present paper, a mechanism of electrochemical reduction of quinoxalin-2-one derivatives at mercury dropping electrode was proposed. Pyrazine ring was found to be the main electroactive center un...
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