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  • Determination of trace amounts of zirconium in real samples after microwave digestion and ternary complex dispersive liquid-liquid microextraction.

Determination of trace amounts of zirconium in real samples after microwave digestion and ternary complex dispersive liquid-liquid microextraction.

Environmental monitoring and assessment (2014-02-04)
Daryoush Afzali, Fariba Fathirad, Sima Ghaseminezhad, Zahra Afzali
ABSTRACT

In this study, a ternary Zr(IV) system with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) and fluoride was chosen on the basis of dispersive liquid-liquid microextraction method. Zirconium was extracted into the fine droplets of dichlorobenzene as extracting solvent. These drops dispersed as a cloud in the aqueous sample with the help of ultrasonic waves, and the procedure was done. Finally, atomic absorption spectrometry was applied for the determination of zirconium. The effects of different factors that influence complex formation and extraction, such as pH, amounts of complexing agents, type and volume of the extracting solvent, as well as sonication and centrifuging time, were optimized. Under optimum conditions, the calibration curve was linear in the range of 150.0-800.0 ng mL(-1) with a limit of detection of 44.0 ng mL(-1). Relative standard deviation was calculated to be 4.1 % (n = 7, c = 400.0 ng mL(-1)). The enrichment factor was 80. The proposed method was successfully used to determine the zirconium in several water, wastewater, and soil samples.

MATERIALS
Product Number
Brand
Product Description

Zirconium, foil, 15mm disks, thickness 0.01mm, 99.2%
Zirconium, tube, 200mm, outside diameter 12.7mm, inside diameter 9.5mm, wall thickness 1.6mm, annealed, 99.2%
Zirconium, foil, light tested, 25x25mm, thickness 0.075mm, annealed, 99.2%
Zirconium, sponge, 20g, max. size 25mm, 99.2%
Zirconium, foil, 300x300mm, thickness 0.25mm, annealed, 99.2%
Zirconium, foil, light tested, 300x300mm, thickness 0.05mm, annealed, 99.2%
Zirconium, foil, 15mm disks, thickness 0.5mm, annealed, 99.2%
Zirconium, foil, 4mm disks, thickness 0.05mm, annealed, 99.2%
Zirconium, foil, not light tested, 150x150mm, thickness 0.0125mm, 99.2%
Zirconium, foil, 1m coil, thickness 0.25mm, annealed, 99.2%
Zirconium, foil, 6mm disks, thickness 0.016mm, 99.2%
Zirconium, foil, light tested, 100x100mm, thickness 0.0125mm, 99.2%
Zirconium, foil, 0.5m coil, thickness 0.125mm, annealed, 99.2%
Zirconium, rod, 1000mm, diameter 1.5mm, 99.2%
Zirconium, tube, 200mm, outside diameter 1.6mm, inside diameter 1.1mm, wall thickness 0.25mm, hard, 99.2%
Zirconium, wire reel, 1m, diameter 0.28mm, annealed, 99.2%
Zirconium, rod, 500mm, diameter 2.0mm, centerless ground, 99.2%
Zirconium, foil, 4mm disks, thickness 0.125mm, annealed, 99.2%
Sigma-Aldrich
Zirconium, foil, thickness 0.1 mm, 99.98% trace metals basis
Sigma-Aldrich
Zirconium, rod, diam. 6.35 mm, ≥99% trace metals basis
Sigma-Aldrich
Zirconium, powder, −100 mesh
Sigma-Aldrich
Zirconium, sponge, ≥99% trace metals basis
Zirconium, foil, light tested, 25x25mm, thickness 0.015mm, 99.2%
Zirconium, foil, light tested, 100x100mm, thickness 0.02mm, 99.2%
Zirconium, foil, not light tested, 25x25mm, thickness 0.001mm, 99.2%
Zirconium, foil, 8mm disks, thickness 0.05mm, annealed, 99.2%
Zirconium, foil, not light tested, 150x150mm, thickness 0.009mm, 99.2%
Zirconium, foil, light tested, 50x50mm, thickness 0.007mm, 99.2%
Zirconium, foil, 4mm disks, thickness 0.0125mm, 99.2%
Zirconium, foil, not light tested, 50x50mm, thickness 0.003mm, 99.2%