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DETERMINATION OF URANIUM IN MARINE SEDIMENT PORE WATERS BY ISOTOPE-DILUTION INDUCTIVELY COUPLED PLASMA MASS-SPECTROMETRY
被引:31
作者:
TOOLE, J
[1
]
MCKAY, K
[1
]
BAXTER, M
[1
]
机构:
[1] SCOTTISH UNIV RES & REACTOR CTR,E KILBRIDE G75 0QU,LANARK,SCOTLAND
关键词:
MASS SPECTROMETRY;
PLASMAS;
ISOTOPE DILUTION;
SEA WATER;
URANIUM;
WATERS;
D O I:
10.1016/S0003-2670(00)80205-6
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
Inductively coupled plasma mass spectrometry (ICP-MS) was used in an isotope dilution mode to assay small-volume (0.25 ml) sediment pore waters for their uranium contents, using U-236 as the spike. The only pretreatment required was a simple dilution by a factor of 20, which gave sufficient volume for three replicate analyses per sample. Rapid and accurate results were obtained for a variety of samples and standards, ranging in concentration from 0.05 to 10 ng U ml-1. A suite of 30 samples can be analysed in less than 6 h by this method. The relative standard deviation was better than 1.9%, with a detection limit, based on 3-sigma background, of 2 pg U ml-1 in solution (40 pg ml-1 in samples). Sea water is a difficult matrix for ICP-MS and thus the method is generally suitable for uranium determinations in many other sample solutions.
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页码:83 / 88
页数:6
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