Determination of trace lanthanides and yttrium in seawater by inductively coupled plasma mass spectrometry after preconcentration with solvent extraction and back-extraction

Journal Article · Sat Dec 15 04:00:00 EST 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00223a012· OSTI ID:6108495

Shabani, M B; Akagi, Tasuku; Shimizu, Hiroshi; Masuda, Akimasa ^[1]

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1. Univ. of Tokyo (Japan)

A method for the analysis of sub parts per trillion levels of rare-earth elements (REEs) and yttrium (Y) in seawater after preconcentration with solvent extraction and back-extraction has been developed. Almost perfect extraction and back-extraction of all REE and Y were achieved by single extraction, and most of the matrix elements were removed during the extraction procedure. Even after 200-fold preconcentration, matrix problems by ICP-MS measurement were negligible. Contamination from reagents and water used during the pretreatment was below 1% of the concentration of REE and Y in seawater. The standard deviation obtained for triplicate separation of 100- and 1,000-mL samples of the same seawater was better than 5% for all REE. The average precision of the measurement for all REE and Y after preconcentration of 1,000 mL of raw seawater to 5 mL of final measurement solution was calculated to be less than 2.5%. Since there is no standard seawater sample for REE and Y, in order to evaluate this novel technique, the analytical results obtained by this method were compared with those obtained by isotope dilution mass spectrometry coupled with Fe coprecipitation.

• OSTI ID: 6108495
• Journal Information: Analytical Chemistry (Washington); (USA), Journal Name: Analytical Chemistry (Washington); (USA) Vol. 62:24; ISSN ANCHA; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
58 GEOSCIENCES
580000 -- Geosciences
COMPARATIVE EVALUATIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
HYDROGEN COMPOUNDS
INFORMATION
MASS SPECTROSCOPY
MEASURING METHODS
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SEAWATER
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
TRANSITION ELEMENTS
WATER
YTTRIUM