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<p>A novel method for the determination of La, Ce, Nd and Sm in apatite by XRF is proposed. The trace amounts of La, Ce, Nd and Sm in apatite is quantitatively separated and preconcentrated with the electrodeposition method from EMIMBF<sub>4</sub> as electrolytes, simultaneously prepared as a membrane sample to negligible matrix effects, which is an essential problem in XRF. The electrodeposition conditions were that the electrolyte portion, current density, temperature, time and agitation speed was 0.35 µmol/L lanthanoide chloride-2.8 µmol/L LiCl-EMIMBF<sub>4</sub> ionic liquid, 6&#xa0;A/dm<sup>2</sup>, 40 ℃, 4&#xa0;h and 300&#xa0;rpm, respectively. The trace amount of La, Ce, Nd and Sm electrodeposited on the platinum cathode was directly measured by the XRF spectrometry. During the electrodeposition from ionic liquid, the recovery of La, Ce, Nd and Sm on the electrode was more than 99.3%. The precision and accuracy of this method was 0.7–4.7% and 0.6-3.0%, respectively. The detection limits of this method were 4, 6, 8 and 9&#xa0;µg·L<sup>− 1</sup> for La, Ce, Nd and Sm, respectively. This method was applied reproductively for the determination of La, Ce, Nd and Sm from apatite.</p>

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Determination of La, Ce, Nd and Sm in apatite by X-ray fluorescence spectrometry with the preconcentration of electrodeposition in EMIMBF4 ionic liquid

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Myong-Jin Ju,
  • Pyong-Hun Kim,
  • Un-Hui Jang

摘要

A novel method for the determination of La, Ce, Nd and Sm in apatite by XRF is proposed. The trace amounts of La, Ce, Nd and Sm in apatite is quantitatively separated and preconcentrated with the electrodeposition method from EMIMBF4 as electrolytes, simultaneously prepared as a membrane sample to negligible matrix effects, which is an essential problem in XRF. The electrodeposition conditions were that the electrolyte portion, current density, temperature, time and agitation speed was 0.35 µmol/L lanthanoide chloride-2.8 µmol/L LiCl-EMIMBF4 ionic liquid, 6 A/dm2, 40 ℃, 4 h and 300 rpm, respectively. The trace amount of La, Ce, Nd and Sm electrodeposited on the platinum cathode was directly measured by the XRF spectrometry. During the electrodeposition from ionic liquid, the recovery of La, Ce, Nd and Sm on the electrode was more than 99.3%. The precision and accuracy of this method was 0.7–4.7% and 0.6-3.0%, respectively. The detection limits of this method were 4, 6, 8 and 9 µg·L− 1 for La, Ce, Nd and Sm, respectively. This method was applied reproductively for the determination of La, Ce, Nd and Sm from apatite.