Multielement Determination of Rare Earth Elements in Coastal Seawater by Inductively Coupled Plasma Mass Spectrometry after Preconcentration Using Chelating Resin

Abstract

Rare earth elements in coastal seawater were preconcentrated by using chelating resin in a batch method and determined simultaneously by inductively coupled plasma mass spectrometry (ICP-MS). In this procedure, matrix components (Na, K, Mg, and Ca) were eliminated to reduce matrix effects in ICP-MS analysis and rare earth elements were concentrated by a concentration factor of 100. The pH dependence of the recovery, resin amounts, amount of ammonium acetate for washing, and elution of adsorbed metals with nitric acid were examined in details to optimize the experimental conditions in sample pretreatment. All rare earth elements in coastal seawater were determined at the ppt or sub-ppt level successfully by the present analytical method.

Multielement Determination of Major-to-Ultratrace Elements in River and Marine Sediment Reference Materials by Inductively Coupled Plasma Atomic Emission Spectrometry and Inductively Coupled Plasma Mass Spectrometry

“…It is also noted that all the samples showed Eu-anomaly. Although the Ce-anomaly is often observed for the REE pattern of seawater 20 , such Ce-anomaly was not found even for the marine sediment sample examined in the present experiment.…”

Simultaneous Determination of Trace Elements in River-water Samples by ICP-MS in Combination with a Discrete Microsampling Technique after Enrichment with a Chitosan-based Chelating Resin

“…Therefore, most of recent studies with Chelex-100 have been carried out by a batch method without a column. [27][28][29][30][31] Though an 8-hydroxyquinoline (8HQ) type chelating resin chemically bonded to silicagel does not exhibit swelling with a pH change, the stability constant of 8HQ-Ca and 8HQ-Mg complexes are relatively close to those of some 8HQ-transition metal complexes. Therefore, most of the calcium and magnesium are recovered with transition metals, which can cause severe spectral interference with the determination of trace elements in sample solutions.…”

Multielement Monitoring for Dissolved and Acid-soluble Concentrations of Trace Metals in Surface Seawater along the Ferry Track between Osaka and Okinawa as Investigated by ICP-MS

“…These concentration levels were quite reasonable, compared to the literature values as the concentrations of Mo, U, and V dissolved in seawater, 2 although some fluctuations of the concentrations were observed, probably because of their poor recoveries in chelating resin preconcentration. 5,6 It can be seen from Fig. 2 that the dissolved concentration of W was at the 0.01 µg l -1 level in the open-sea area, which was lower by ca.…”

“…[5][6][7] In the preconcentration procedure, a 250 ml sample of the seawater was taken in a glass beaker, and the pH of the sample was adjusted to pH 6 by using an acetic acid solution and an aqueous ammonia solution. Then, 0.2 g (dry weight) of the chelating resin was added to the seawater sample, and the sample solution was stirred for 2 h with a magnetic stirrer.…”