Selective Separation and Preconcentration of Trace Amounts of Gallium in Water and Rice Samples Using Cloud Point Extraction and Determination by Inductively Coupled Plasma-Atomic Emission Spectrometry

Beiraghi, Asadollah; Roshdi, Mina

doi:10.22034/ijnc.2018.32988

Document Type : Research Paper

Authors

Asadollah Beiraghi ¹
Mina Roshdi ²

¹ Faculty of Chemistry, Kharazmi University, Mofatteh Ave., No. 49. Tehran. Iran

² Faculty of Chemistry, Kharazmi University, Tehran, Iran

https://doi.org/10.22034/ijnc.2018.32988

Abstract

In the present study a cloud-point extraction process using non-ionic surfactant Triton X-114 for selective extraction of gallium from aqueous solutions was developed. The method is based on the complex formation of Ga (III) with N, N′ -bis (salycilidene)-1, 2-phenylenediamine (salophen) as a chelating agent in buffer media of pH 5. After phase separation and dilution of the surfactant-rich phase with 0.2 mL of a (80-20) propanol-water mixture containing 0.02 mL HNO3, the enriched analyte was determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The variables affecting the complexation and extraction steps were optimized. Under the optimum conditions (i.e. 7.5×10-5 mol L-1 salophen, 0.5% (v/v) Triton X-114, 45ºC equilibrium temperature, incubation time 15 min) the calibration graph was linear in the range of 20–120 ng mL-1 with detection limit of 1.5 ng mL-1. The precision (R.S.D. %) for five replicate determinations at 60 ng mL-1 of Ga (III) was better than 4%. In this manner, the preconcentration factor was 22.2. Under the presence of foreign ions, no significant interference was observed. Finally, the proposed method was utilized successfully for the determination of gallium in water and rice samples.

Keywords

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International Journal of New Chemistry

Selective Separation and Preconcentration of Trace Amounts of Gallium in Water and Rice Samples Using Cloud Point Extraction and Determination by Inductively Coupled Plasma-Atomic Emission Spectrometry

References

References

Volume 5, Issue 3
July 2018
Pages 124-139

Selective Separation and Preconcentration of Trace Amounts of Gallium in Water and Rice Samples Using Cloud Point Extraction and Determination by Inductively Coupled Plasma-Atomic Emission Spectrometry

References

References

Volume 5, Issue 3July 2018Pages 124-139

Volume 5, Issue 3
July 2018
Pages 124-139