Developments in the Determination of Trace Elements by Atomic Spectroscopic Techniques

Abstract

Recent developments in sample treatment, such as liquid-and solid-phase extraction, coprecipitation, and electrodeposition, are presented. In addition, this review considers the benefits and drawbacks of atomic absorption techniques (F-AAS, GF-AAS, CV-AAS, HG-AAS, and HR-CSAAS) used to identify and quantify different elements in a variety of matrices.

Bioconcentração e biomagnificação de metilmercúrio na baía de Guanabara, Rio de Janeiro

“…1 Com o aumento das atividades industriais, agrícolas e mineradoras, bem como o crescimento populacional observados no último século, uma série de contaminantes (matéria orgânica, poluentes orgânicos e um grande número de compostos metálicos) vem sendo liberada para o meio ambiente, principalmente para a atmosfera e os ecossistemas aquáticos. 2 Os contaminantes de compostos metálicos presentes nos efluentes das atividades antrópicas apresentam pouca solubilidade na água resultando, então, em baixas concentrações, mesmo em locais próximos às suas emissões pontuais, via efluente. Entretanto, em ambientes estuarinos, os contaminantes metálicos estão preferencialmente associados ao material particulado em suspensão, que lhes serve de veículo para áreas mais distantes das suas fontes.…”

A new coprecipitation method without carrier element for separation and preconcentration of some metal ions at trace levels in water and food samples

“…Flame atomic absorption spectrometry (FAAS) has been a useful technique to detect trace heavy-metal ions in various environmental, food and water samples because of its high selectivity, speed, easy instrument usage and low costs [3]. Two main limitations in FAAS detections of heavy-metal ions are lower levels of analyte ions than the detection limits of FAAS and high interfering influences of matrix ions on the signal of the analytes [1,4].…”

Octadecyl Bonded Silica Membrane Disk Modified with Cyanex302 for Preconcentration and Determination of Traces of Cobalt in Urine by Flame Atomic Absorption Spectrometry

“…Cobalt determination from different types of environmental, food, and clinical samples has gained prominence. Flame atomic absorption spectrophotometry (FAAS) has been widely used for detection of trace elements due to its ease of operation and cost effectiveness (Srogi 2008). But the determination of traces of cobalt in such complex samples often requires a preconcentration step, due to the spectral or chemical interference due to the matrix effect.…”