Precise determination of mass-dependent variations in the isotopic composition of molybdenum using MC-ICPMS

A. D. Anbar; K. A. Knab; J. Barling

doi:10.1021/ac000829w

Precise determination of mass-dependent variations in the isotopic composition of molybdenum using MC-ICPMS

A. D. Anbar, K. A. Knab, J. Barling

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146 Scopus citations

Abstract

We present an analytical approach for the precise determination of mass-dependent differences in the isotopic composition of Mo between samples and reference standards using multiple-collector magnetic sector inductively coupled plasma mass spectrometry (MC-ICPMS). Either Zr or Ru "element spikes" are employed to correct for instrumental mass bias. Differences in ⁹⁵Mo/⁹⁷Mo can be determined to a precision of ±0.2‰ (±2σ) using 1-10 μg of Mo. Similar precision is possible for other ratios after correction for isobaric interferences from either spike element. This approach facilitates study of mass-dependent variations in the isotopic composition of Mo in nature and in materials produced by laboratory processes. We observe fractionation of Mo isotopes of ∼1.5‰/amu during ion-exchange chromatography in the laboratory and a shift of ∼0.3‰/amu between natural MoS₂ and a laboratory standard.

Original language	English (US)
Pages (from-to)	1425-1431
Number of pages	7
Journal	Analytical Chemistry
Volume	73
Issue number	7
DOIs	https://doi.org/10.1021/ac000829w
State	Published - Apr 1 2001
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry

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10.1021/ac000829w

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title = "Precise determination of mass-dependent variations in the isotopic composition of molybdenum using MC-ICPMS",

abstract = "We present an analytical approach for the precise determination of mass-dependent differences in the isotopic composition of Mo between samples and reference standards using multiple-collector magnetic sector inductively coupled plasma mass spectrometry (MC-ICPMS). Either Zr or Ru {"}element spikes{"} are employed to correct for instrumental mass bias. Differences in 95Mo/97Mo can be determined to a precision of ±0.2‰ (±2σ) using 1-10 μg of Mo. Similar precision is possible for other ratios after correction for isobaric interferences from either spike element. This approach facilitates study of mass-dependent variations in the isotopic composition of Mo in nature and in materials produced by laboratory processes. We observe fractionation of Mo isotopes of ∼1.5‰/amu during ion-exchange chromatography in the laboratory and a shift of ∼0.3‰/amu between natural MoS2 and a laboratory standard.",

author = "Anbar, {A. D.} and Knab, {K. A.} and J. Barling",

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T1 - Precise determination of mass-dependent variations in the isotopic composition of molybdenum using MC-ICPMS

AU - Anbar, A. D.

AU - Knab, K. A.

AU - Barling, J.

PY - 2001/4/1

Y1 - 2001/4/1

N2 - We present an analytical approach for the precise determination of mass-dependent differences in the isotopic composition of Mo between samples and reference standards using multiple-collector magnetic sector inductively coupled plasma mass spectrometry (MC-ICPMS). Either Zr or Ru "element spikes" are employed to correct for instrumental mass bias. Differences in 95Mo/97Mo can be determined to a precision of ±0.2‰ (±2σ) using 1-10 μg of Mo. Similar precision is possible for other ratios after correction for isobaric interferences from either spike element. This approach facilitates study of mass-dependent variations in the isotopic composition of Mo in nature and in materials produced by laboratory processes. We observe fractionation of Mo isotopes of ∼1.5‰/amu during ion-exchange chromatography in the laboratory and a shift of ∼0.3‰/amu between natural MoS2 and a laboratory standard.

AB - We present an analytical approach for the precise determination of mass-dependent differences in the isotopic composition of Mo between samples and reference standards using multiple-collector magnetic sector inductively coupled plasma mass spectrometry (MC-ICPMS). Either Zr or Ru "element spikes" are employed to correct for instrumental mass bias. Differences in 95Mo/97Mo can be determined to a precision of ±0.2‰ (±2σ) using 1-10 μg of Mo. Similar precision is possible for other ratios after correction for isobaric interferences from either spike element. This approach facilitates study of mass-dependent variations in the isotopic composition of Mo in nature and in materials produced by laboratory processes. We observe fractionation of Mo isotopes of ∼1.5‰/amu during ion-exchange chromatography in the laboratory and a shift of ∼0.3‰/amu between natural MoS2 and a laboratory standard.

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JO - Analytical Chemistry

JF - Analytical Chemistry

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Precise determination of mass-dependent variations in the isotopic composition of molybdenum using MC-ICPMS

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