Continuous Determination of Mercury in Air by Gold Amalgamation and Flameless Atomic Absorption
نویسندگان
چکیده
We have developed an aerial mercury monitoring system whose operating principle is based upon gold amalgamation and flameless atomic absorption. A stable measurement of micro-trace mercury in the air becomes possible by preventing dirt from accumulating in the measuring system and minimizing interference from other gases occupying the same area. As a mercury collecting agent, a Chromosorb P coated with gold proved to be durable against repeated long-time operation. Absorption of organic gases on the Chromosorb P can be avoided if the mercury collecting agent is kept heated to 150°C. When measurements were intermittently repeated up to 10 times, the coefficient variation was 3%.
منابع مشابه
Use of Different Gold Amalgamation Techniques in Mercury Determination by Cold Vapor Atomic Absorption Spectrometry
متن کامل
Determination of mercury concentration in the air of dental clinics and the urines of their personnel with cold vapor atomic absorption spectrometry
Background: Dental clinics are known to be one of the largest users of Toxic inorganic mercury. It is well documented that dentists and dental assistants who work with amalgam are chronically exposed to mercury vapor. This study investigates exposure to mercury vapor in a dental clinic. Methods: GBC cold vapor atomic absorption spectrometry (AAS), using sodium borohydride as the reducing age...
متن کاملDetermination of mercury by atomic-absorption spectrophotometry.
A flameless atomic-absorption system has been developed for the determination of low concentrations of mercury in gaseous, solid and liquid samples of organic and inorganic materials.
متن کاملHanging Mercury Drop Electrodeposition Technique for Carbon Filament Flameless Atomic Absorption Analysis Application to the Determination of Copper in Sea Water
Analytical Chemistry is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Hanging mercury drop electrodeposition technique for carbon filament flameless atomic absorption analysis. Application to the determination of copper in sea water Charles. Fairless, and Allen J. Bard Anal. Chem., 1973, 45 (13), 2289-2291• DOI: 10.1021/ac60335a036 • Publication Da...
متن کاملDetermination of total and inorganic mercury in hair by flameless atomic absorption, and of methylmercury by gas chromatography.
A new procedure for alkaline digestion of hair was used for the selectivedetermination of total and inorganic mercury by flameless atomic absorption and the determination of methylmercury by an improved gas-chromatographic procedure. The precision of the measurements by atomic absorption for total, inorganic, and organic mercury (by difference) was 1.9%, 6.5%, and 2.1%, respectively. Recoveries...
متن کامل