Determination of ultra-trace Pt, Pd and Rh in seawater using an off-line pre-concentration method and inductively coupled plasma mass spectrometry

Chemosphere
Kai LiuQianguo Xing

Abstract

A method was modified for the preconcentration of platinum (Pt), palladium (Pd) and rhodium (Rh) from seawater by a solid phase extraction using a commercially available resin Nobias-chelate PA1®. All the determination was conducted using inductively coupled plasma mass spectrometry (ICP-MS) which had a low detection limit for Pt, Pd and Rh, about 16.53, 16.41 and 26.88 pg L-1, respectively. It was found that the adsorption performance of the resin was closely related to the matrix, ligands and pH of the samples. Significant difference in recovery was found in various samples: seawater ≈ artificial seawater > ultra-pure deionized water. This method had low method blank in the range of 5.51-8.89 pg L-1 and high enrichment factor of up to 180-200. The recoveries of Pt and Pd were 93 ± 4.2% in the spiked real seawater. However, the recovery of Rh on the resin was below 70% but stable in the range of 65-68%. It indicated that the Rh recovery seemed to be reproducible and higher volumes of seawater must be processed in order to obtain the lower limit of quantification and excellent recovery.

Citations

Feb 25, 2020·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Shigehiro KagayaYoshinori Inoue
Jan 3, 2021·Archives of Environmental Contamination and Toxicology·Hongna LiuXuefa Shi
Aug 28, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Kaiyu ZhangWeina Li

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