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Arsenic, one of the main environmental pollutants and potent natural poison, is a chemical element that is spread throughout the Earth's crust. It is well known that the toxicity of arsenic is highly dependent on its chemical forms. Generally, the inorganic species are more toxic than its organics forms, and As(III) is 60 times more toxic than As(V). In environmental waters, arsenic exists predominantly...
A rapid and simple method was developed for separation and pre-concentration of mercury by flow injection solid phase extraction coupled with on-line chemical vapour generation electrothermal atomic absorption spectrometry (CV-HG ETAAS). The system is based on chelating retention of the analyte onto the mini column filled with a new nanosorbent, mesoporous silica functionalized with 1,5 bis (di-2-pyridyl)...
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