Multielement Determination of Trace Elements in Coastal Seawater by Inductively Coupled Plasma Mass Spectrometry with Aid of Chelating Resin Preconcentration

Abstract

The multielement determination of trace elements in coastal seawater by inductively coupled plasma mass spectrometry has been investigated with the aid of chelating resin preconcentration. First, each coastal seawater sample (250 ml) was treated with a chelating resin (Chelex 100) at pH 6 for preconcentration of trace elements. After filtration with a glass filter, the resin on the filter was carefully rinsed with 8 ml of 1 M ammonium acetate solution. Then, trace elements adsorbed on the resin were eluted with 6 ml of 2 M HNO3. As a result, the preconcentration factor of 41.7 fold was obtained, with the total concentration of matrix elements (Na, K, Mg, and Ca) less than 200 mg dm−3. The recovery values were larger than 80% for 22 elements among 29 elements determined. The present method was applied to the determination of trace elements in the coastal seawater certified reference material CASS-3, issued from National Research Council of Canada (NRC), as well as to the coastal seawater sample collected from Tokoname off-shore.

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 The chelating resin (Chelex 100) in 100 -200 mesh was purchased from Bio-Rad Laboratories (Lichmond, CA, USA). The resin was soaked in 5 M HCl for about one week, changing every day, and washed with pure water before use.…”

“…[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.…”

“…These analytical detection limits were estimated as follows, in a similar manner to previous work. 5 First, the instrumental detection limits were obtained as the concentrations of analyte metals corresponding to 3-times the standard deviation (3σ) of the blank signal intensities at each m/z in the ICP-MS measurement, when 2 M HNO3 was nebulized as the blank solution into the plasma. The standard deviation (σ) was calculated from 10-times repeated measurements.…”

Major-to-Ultratrace Elements in Bone-Marrow Fluid as Determined by ICP-AES and ICP-MS

“…The experimental conditions were chosen after optimizing the instrumental parameters as in previous studies. 11,12 The wavelengths of the emission lines and mass numbers (m/z) for the analyte elements used in the ICP-AES and ICP-MS measurements, respectively, are given in Table 2. In the ICP-MS measurement, matrix effects due to major elements in the sample were corrected by the internal-standard method, 13 where Ge, Rh, Re and Tl were used as the internal-standard elements.…”