DETERMINATION OF MERCURY ISOTOPE RATIOS IN SAMPLES CONTAINING SUBNANOGRAM AMOUNTS OF MERCURY USING INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY

被引：11

作者：

HARALDSSON, C

LYVEN, B

OHMAN, P

MUNTHE, J

机构：

[1] CHALMERS UNIV TECHNOL,S-41296 GOTHENBURG,SWEDEN

[2] SWEDISH ENVIRONM RES INST,S-40258 GOTHENBURG,SWEDEN

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 1994年 / 9卷 / 11期

关键词：

INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY; MERCURY ISOTOPE RATIOS; STABLE ISOTOPES; PRECONCENTRATION ON GOLD TRAPS;

D O I：

10.1039/ja9940901229

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The determination of sub-nanogram amounts of mercury demands systems of high sensitivity. To determine isotopic ratios a large signal Is required to obtain a high number of counted ions. It Was found that the precision in the isotope ratio determination in samples containing less than 300 pg of mercury is limited by the counting statistics. With 300 pg of mercury the precision was 0.2% (relative standard deviation) in the Hg-202:Hg-199 ratio. The detection limit was lowered by concentration of mercury vapour on gold traps, and the sensitivity of the instrument was increased 4-6-fold by addition of nitrogen or hydrogen to the central gas flow.

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收藏

页码：1229 / 1232

页数：4

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