AI Article Synopsis
- An automatic separation preconcentration system is linked to an electrothermal atomic absorption spectrometer, using a microcolumn filled with a chelating resin for efficient sample preparation.
- The system employs a microcomputer-controlled manifold with solenoid valves to automate processes like conditioning, preconcentration, and washing, completely eliminating manual handling.
- It successfully analyzed cadmium (Cd) and lead (Pb) in sea water from Patagonia, achieving detection limits of 1 and 8 ng l-1, and validated results against certified reference materials.
Article Abstract
An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer is described. The preconcentration step is performed on a chelating resin microcolumn (Chelex-100) placed in the injection tip of the autosampler. A time based manifold with two- and three-way solenoid valves commanded by an eight channel microcomputer programmable controller is used for column conditioning, preconcentration and washing steps; no manual operations are involved. Elution is performed by the programmable graphite furnace autosampler and achieved in only one step. Operations involving complete and partial injection of the eluate into the graphite furnace are also discussed. The system was applied to the determination of Cd and Pb in near shore sea-water from Patagonia, Argentina. Detection limits of 1 and 8 ng l-1 were obtained for Cd and Pb respectively. Analysis of a certified reference material (CASS-3) showed good agreement with the certified values.
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| http://dx.doi.org/10.1039/a607598c | DOI Listing |
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Article Synopsis
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- A novel autosampler extension has been developed to enhance GF-AAS by ensuring sample suspension stability and preventing evaporation and contamination, offering reliable results with impressive recovery rates in various materials.
- This advancement streamlines trace element analysis in complex samples, making it an essential tool for environmental monitoring and regulatory compliance while improving accuracy and efficiency in high-throughput settings.
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