Determination of total mercury in biological tissues by flow injection cold vapour generation atomic absorption spectrometry following tetramethylammonium hydroxide digestion.

Robust ultrasound assisted extraction approach using dilute TMAH solutions for the speciation of mercury in fish and plant materials by cold vapour atomic absorption spectrometry (CVAAS)

A simple and rapid ultrasound assisted extraction (UAE) protocol with dilute solutions of tetramethylammonium hydroxide (TMAH) for the speciation of mercury in fish and plant tissues was developed as an alternative to conventional methods which require intensive treatments. The main operational parameters, such as extractant concentration (TMAH), sonication time and amount of sample, were optim...

Determination of total mercury in bauxite and bauxite residue by flow injection cold vapour atomic absorption spectrometry

Automated continuous monitoring of inorganic and total mercury in wastewater and other waters by flow-injection analysis and cold-vapour atomic absorption spectrometry

An automated continuous monitoring system for the determination of inorganic and total mercury by flow-injection analysis followed by cold-vapour atomic absorption spectrometry is described. The method uses a typical flow-injection manifold where digestion and reduction of the injected sample takes place. Mercury is removed by aeration from the flowing stream in a specially designed air-liquid ...

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...

Determining Total Mercury in Samples from the Persian Gulf and theCaspian Sea: Comparison of Dry Ash and Wet Extraction Mothods

Monitoring of mercury in environmental samples, with its proven toxicity on the food chain, requires sensitive and accurate analytical techniques. In this study, two methods for identification and quantification of total mercury in biological and sediment samples are compared: i) dry ash preparation and subsequent established procedures for Combustion Atomic Absorption Spectrometry, (AMA 254) ...