Article ID Journal Published Year Pages File Type
5142260 Arabian Journal of Chemistry 2016 6 Pages PDF
Abstract
Dispersive liquid-liquid microextraction based on solidification of floating organic droplet was successfully used as a sample preparation method prior to flame atomic absorption determination of trace amounts of Tl(III) and Tl(I) in hair samples. In the proposed method, 1-(2-pyridylazo)-2-naphthol, 1-dodecanol and ethanol were used as chelating agent, extraction and dispersive solvent, respectively. Several factors that may be affected in the extraction process, such as type and volume of extraction and disperser solvents, pH, salting out effect, ionic strength and extraction time were studied. Under the optimal conditions, linearity was maintained between 6.0 and 900.0 ng mL−1 for Tl(III). The relative standard deviation for seven replicate determinations of 0.2 μg mL−1 Tl(III) was 2.5%. The detection limit based on 3Sb for Tl(III) in the original solution was 2.1 ng mL−1. The proposed method has been applied for the determination of trace amounts of thallium in hair samples and satisfactory results were obtained.
Related Topics
Physical Sciences and Engineering Chemistry Chemistry (General)
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