To rapidly treat a large amount of air containing trace volatile organic compounds, we previously developed an air cleaner consisting of a continuous adsorption-anddesorption concentrator with a honeycomb rotor loading zeolite particles and a photocatalytic reactor with a parallel array of nine 6W blacklight blue fluorescent lamps. In the present work, this air cleaner was miniaturized and its ...

Application of aromatic compounds has dramatically increased as raw materials in various industries and different factories have been established to produce aromatic compounds. The current research aims at characterizing industrial waste generation in aromatics production process in petrochemical industries and determining the best feasible alternative for waste disposal. For this purpose, the ...

AR: The coupling is considered two-way in the sense that, for each model time step, the atmospheric component provides to JULES the current near-surface wind speed, air temperature, pressure, condensed water and downward radiation fluxes, as well as water vapor and trace gas (e.g carbon dioxide and monoxide, methane, and volatile organic compounds) mixing ratios. After its processing, JULES adv...

Sensor technology is one of the most significant technology for the future with a constantly growing number of applications, ranging from toxic gas detection, manufacturing process monitoring to medical diagnosis and health monitoring. Among the different existing sensor technologies, the semiconductor sensors are most attractive for their high sensitivity, small size and light-weight construct...

We discuss the use of "high-performance" liquid chromatography with electrochemical detection for the quantification fo serotonin (5-hydroxytryptamine) and metabolically related products (i. e., 5-hydroxyindoleacetic acid and 5-hydroxytryptophan) in biological matrices. Two methods are described: one for routine quantification of nanogram amounts or more; the other a two-column purification-sep...

Analytical methods capable of trace measurement of semivolatile organic compounds (SOCs) are necessary to assess the exposure of tadpoles to contaminants as a result of long-range and regional atmospheric transport and deposition. The present study compares the results of two analytical methods, one using pressurized liquid extraction (PLE) and the other using matrix solid-phase dispersion (MSP...

For fluorometry of selenium in human blood, hair, and liver and in leaves, we wet-ashed the samples with conventional nitric and perchloric acids, and then extracted piazselenol (complex of Se and 2,3-diaminonaphthalene) in cyclohexane. Selenium was back-extracted from the cyclohexane into nitric acid to remove the fluorometric interferences of trace amounts of organic compounds. This fluoromet...

A method was developed that offers a rapid, simple and accurate technique for the determination of chlorophenols at trace levels in aqueous samples with very limited volumes of organic solvents. These compounds were acetylated, then preliminarily extracted with n-hexane. The enriched chlorophenols were directly analyzed using gas chromatography with an electron-capture detector. The detection l...