Determination of 14 Rare Earth Elements in Seawater by Solid Phase Extraction-Inductively Coupled Plasma Mass Spectrometry

A solid-phase extraction (SPE) method utilizing an iminodiacetic acid-based chelating resin as the stationary phase was developed for the determination of 14 rare earth elements in seawater by inductively coupled plasma mass spectrometry (ICP-MS). Adjust the pH value of water sample to the range of 8.5~9.0, followed by adsorption and enrichment of the target elements through solid-phase extraction. The detection limit of rare earth elements was 0.017 μg/L~0.024 μg/L,the relative standard deviation (RSD) of the method was 2.7%~4.8%,the recovery rates of spiking was 81.4%~105.0%. The proposed methodology is characterized by operational simplicity, high sensitivity, and efficiency, yielding highly satisfactory experimental results.