Determination of uranium in water samples by ICP-AES with chelating resin disk preconcentration.

Miura, Tsutomu; Morimoto, T.; Hayano, Kazuhiko; Kishimoto, Takeshi

doi:10.2116/bunsekikagaku.49.245

Cited by 37 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Preconcentration and separation techniques including solvent extraction, solid-phase extraction, co-precipitation and ion-exchange, electrodeposition [9][10][11][12][13][14] have been used in the analytical chemistry laboratories for uranium. Shamsipur et al [14] have proposed a solid phase extraction procedure for ultratrace uranium(VI) in natural waters using octadecyl silica membrane disks modified by tri-noctylphosphine oxide.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Rezaee¹,

Khalilian²

2015

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

ABSTRACT.A new liquid phase microextraction method based on the dispersion of an extraction solvent into aqueous phase coupled with solid-phase extraction was investigated for the extraction, preconcentration and determination of uranium in water samples. 1-(2-Pyridylazo)-2-naphthol reagent (PAN) at pH 6.0 was used as a chelating agent prior to extraction. After concentration and purification of the samples in SPE C18 sorbent, 1.5 mL elution sample containing 40.0 µL chlorobenzene was injected into the 5.0 mL pure water. After extraction and centrifuging, the sedimented phase was evaporated and the residue was dissolved in nitric acid (0.5 M) and was injected by injection valve into the ICP-OES. Some important extraction parameters, such as sample solution flow rate, sample pH, type and volume of extraction and disperser solvents as well as the salt addition were studied and optimized. Under the optimum conditions, the calibration graph was linear in the range of 0.5-500 µg L . The relative standard deviation (RSD) at 5.0 µg L -1 concentration level was 6.6%. Finally, the developed method was successfully applied to the extraction and determination of uranium in the well, river, mineral, waste and tap water samples and satisfactory results were obtained.

show abstract

Section: Introductionmentioning

confidence: 99%

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Rezaee¹,

Khalilian²

2015

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

show abstract

“…Many enrichment and separation techniques including solvent extraction, coprecipitation, ion exchange and electrodeposition [2][3][4][5][6] have been used for uranium and thorium. Solid phase extraction is one of the important preconcentration-separation procedures for trace heavy metal ions, due to its simplicity and limited usage of the organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

Nilchi

Dehaghan

Garmarodi

2012

J Radioanal Nucl Chem

View full text Add to dashboard Cite

A simple and reliable method for rapid extraction and determination of uranium and thorium using octadecyl-bonded silica modified with Cyanex 302 is presented. Extraction efficiency and the influence of various parameters such as aqueous phase pH, flow rate of sample solution and amount of extractant has been investigated. The study showed that the extraction of uranium and thorium increase with increasing pH value and was found to be quantitative at pH 6; and the retention of ions was not affected significantly by the flow rate of sample solution. The extraction percent were found to be 89.55 and 86.27 % for uranium and thorium, respectively. The maximal capacity of the cartridges modified by 30 mg of Cyanex 302 was found to be 20 mg of uranium and thorium. The method was successfully applied to the extraction and determination of uranium and thorium in aqueous solutions. The percentage recovery of uranium and thorium in a number of natural as well as seawater samples of Iran were also investigated and found to be in the range of 85-95 %.

show abstract

“…In particular, disk-type SPE has been widely used to preconcentrate a large-volume water sample (e.g., 100 -1000 mL) for inorganic [2][3][4][5][6] and organic [7][8][9][10][11] analyses because it offers higher flow rates than column-type SPE owing to its large cross-sectional area. Iminodiacetate Extraction Disks (IEDs) are useful for the preconcentration of trace metals in water because of their high selectivity for heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Determination of Heavy Metals at Sub-ppb Levels in Water by Graphite Furnace Atomic Absorption Spectrometry Using a Direct Introduction Technique after Preconcentration with an Iminodiacetate Extraction Disk

Inui¹,

Kosuge²,

Ohbuchi³

et al. 2012

AJAC

View full text Add to dashboard Cite

A direct analysis method combining an iminodiacetate extraction disk (IED) with graphite furnace atomic absorption spectrometry was developed for the determination of Co, Ni, Cu, Cd, Sn, Pb, and Bi at sub-ppb levels in water. A 100 mL water sample was adjusted to pH 5.6 with nitric acid and a 1 mol·L -1 ammonium acetate solution, and then passed through an IED (diameter, 47 mm; effective filtering diameter, 35 mm) at a flow rate of 80 -100 mL·min -1 to preconcentrate seven analytes. The IED was dried at 100˚C for 20 min in an electric oven, and 110 -145 small disks, each 2 mm in diameter, were punched out from the IED. A small disk was introduced into the graphite furnace and atomized according to a heating program. For Cd, Sn, Pb, and Bi measurements, Pd was used as a chemical modifier to enhance the absorbances. Calibration was performed using aqueous standard solutions. The detection limits, corresponding to three times the standard deviation (n = 5) of the blank values, were 0.092 μg·L -1 for Co, 0.12 μg·L -1 for Ni, 0.40 μg·Lfor Cu, 0.077 μg·L -1 for Cd, 0.92 μg·L -1 for Sn, 0.61 μg·L -1 for Pb, and 0.80 μg·L -1 for Bi with an enrichment factor of 140 using a 100-mL water sample. A spike test for the seven analytes in tap water, rainwater, river water, and mineral drinking water showed quantitative recoveries (93% -108%).

show abstract

Determination of uranium in water samples by ICP-AES with chelating resin disk preconcentration.

Cited by 37 publications

References 11 publications

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

Determination of Heavy Metals at Sub-ppb Levels in Water by Graphite Furnace Atomic Absorption Spectrometry Using a Direct Introduction Technique after Preconcentration with an Iminodiacetate Extraction Disk

Contact Info

Product

Resources

About