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Antimony speciation by inductively coupled plasma mass spectrometry using solid phase extraction cartridges.

Chunhai Yu1, Qiantao Cai, Zhong-Xian Guo

  • 1Centre for Advanced Water Technology, Innovation Centre (NTU), Singapore.

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|November 15, 2002
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A new method uses solid phase extraction (SPE) and inductively coupled plasma mass spectrometry (ICP-MS) for antimony speciation in water. This technique accurately distinguishes antimony(III) and antimony(V) at low detection limits.

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Area of Science:

  • Analytical Chemistry
  • Environmental Chemistry

Background:

  • Accurate speciation of inorganic antimony is crucial for environmental and health risk assessments.
  • Existing methods for antimony speciation can be complex and time-consuming.

Purpose of the Study:

  • To develop a simple, selective, and sensitive method for inorganic antimony speciation in aqueous samples.
  • To enable the differentiation and quantification of antimony(III) and antimony(V).

Main Methods:

  • Selective solid phase extraction (SPE) using C8 cartridges to separate Sb(III)-APDC complex from Sb(V).
  • Detection of total antimony and Sb(V) using inductively coupled plasma mass spectrometry (ICP-MS).
  • Calculation of Sb(III) concentration by subtracting Sb(V) from total antimony.

Main Results:

  • The method achieved selective retention of Sb(III)-APDC complex on C8 cartridges.
  • Sb(V) passed through the cartridge, allowing for separate detection.
  • A low detection limit of 1 ng L(-1) for antimony was achieved.
  • The method demonstrated robustness against foreign ions and was successfully applied to various water samples.

Conclusions:

  • The developed SPE-ICP-MS method provides a simple and effective approach for antimony speciation.
  • This technique is suitable for analyzing antimony species in diverse water matrices.
  • The method offers high sensitivity and selectivity for environmental monitoring applications.