Elimination of isobaric interferences in ICP-MS, using ion-molecule reaction chemistry: Rb/Sr age determination of magmatic rocks, a case study

被引：89

作者：

Moens, LJ ^{[1
]}

Vanhaecke, FF ^{[1
]}

Bandura, DR ^{[1
]}

Baranov, VI ^{[1
]}

Tanner, SD ^{[1
]}

机构：

[1] Univ Ghent, Inst Nucl Sci, Analyt Chem Lab, B-9000 Ghent, Belgium

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2001年 / 16卷 / 09期

关键词：

D O I：

10.1039/b103707m

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

It is shown that ion-molecule reactions in a dynamic reaction cell (DRC) allow the Rb-87/Sr-87 isobaric interference to be eliminated and that Sr isotope ratios can be determined precisely and accurately by measuring the intensities of the corresponding SrF+ ion beams after selective reaction of Sr with CH3F in the cell. The technique is used for the Rb/Sr age determination of magmatic rocks, without any sample pretreatment except for the dissolution or the samples. Sr isotope ratios can thus be measured with a precision that is very near to counting statistics and the measured age and initial Sr-87/Sr-86 ratio of the rocks fully agrees with reference values of thermal ionisation mass spectrometry (TIMS). The precision of the age is of the same order as the precision of the TIMS results.

引用

页码：991 / 994

页数：4

共 14 条

[1] Effect of collisional damping and reactions in a dynamic reaction cell on the precision of isotope ratio measurements
Bandura, DR
Baranov, VI
Tanner, SD
[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 2000, 15 (08) : 921 - 928
[2] Dickin A.P., 1995, RADIOGENIC ISOTOPE G
[3] Faure G, 1986, PRINCIPLES ISOTOPE G
[4] KOHLER H, 1986, NEUES JB MINER ABH, V155, P219
[5] KOHLER H, 1974, NEUES JB MINER ABH, V127, P174
[6] LUDWIG KR, 1998, SPECIAL PUBLICATION, V1
[7] Preliminary investigation of electrothermal vaporization sample introduction for inductively coupled plasma time-of-flight mass spectrometry
Mahoney, PP
Ray, SJ
Li, GQ
Hieftje, GM
[J]. ANALYTICAL CHEMISTRY, 1999, 71 (07) : 1378 - 1383
[8] Double-focusing mass spectrometers in ICPMS
Moens, L
Jakubowski, N
[J]. ANALYTICAL CHEMISTRY, 1998, 70 (07) : 251A - 256A
[9] Rosman KJR, 1998, J ANAL ATOM SPECTROM, V13, p45N
[10] Russ G. P., 1989, APPL INDUCTIVELY COU

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