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Vol. 26 No. 1 (2014): Vol 26 Issue 1

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Preconcentration of Platinum Using Multi-Walled Carbon Nanotubes as Solid Phase Extraction Sorbent

https://doi.org/10.14233/ajchem.2014.15312
Chunhua Yang
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Zhangjie Huang
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Zhongqi Yang
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China

Corresponding Author(s) : Zhangjie Huang

zhjhuang@ynu.edu.cn

Asian Journal of Chemistry, Vol. 26 No. 1 (2014): Vol 26 Issue 1

Abstract

A solid phase extraction and graphite furnace atomic absorption spectrometry for the determination of platinum with multi-walled carbon nanotubes as sorbent was studied. Platinum are preconcentrated on multi-walled carbon nanotubes in the form of (L2·H3O+)2PtCl62- ion-pairs, where L = heptyl octyl sulfoxide and water was used as eluent. The effects of various parameters such as acidity, flow rate of sample, type of eluent, amount of adsorbent and interfering ions have been studied. The platinum in 100 mL solution can be concentrated to 2 mL, representing an enrichment factor of 50 was achieved. The detection limit and quantification limit of the method were found to be 0.06 and 0.2 μg L-1, respectively. The analytical results for the certified reference sample (GBW07292) was in a good agreement with the certified value. The relative standard deviation for ten replicate measurements of 1 μg L-1 platinum was 4.5 %. The proposed method was successfully applied to the extraction and determination of trace amount platinum in different samples.

Keywords

Solid phase extraction Platinum Heptyl octyl sulfoxide Multi-walled carbon nanotubes
Yang, C., Huang, Z., & Yang, Z. (2013). Preconcentration of Platinum Using Multi-Walled Carbon Nanotubes as Solid Phase Extraction Sorbent. Asian Journal of Chemistry, 26(1), 53–56. https://doi.org/10.14233/ajchem.2014.15312
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