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Related Experiment Videos

Perchlorate analysis using solid-phase extraction cartridges.

Victor F Medina1, Steven L Larson, Barbara Extine

  • 1Environmental Laboratory, U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA.

Journal of Chromatographic Science
|June 25, 2005
PubMed
Summary
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This study introduces solid-phase extraction cartridges for accurately measuring low perchlorate levels in water. This method offers a reliable alternative for environmental monitoring of perchlorate contamination.

Area of Science:

  • Environmental Science
  • Analytical Chemistry

Background:

  • Perchlorate is an emerging environmental contaminant.
  • Stringent regulations necessitate sensitive analytical methods for perchlorate detection.

Purpose of the Study:

  • To investigate solid-phase extraction (SPE) cartridges as an alternative to large-volume injection loops for low-level perchlorate quantitation.
  • To develop and validate a method for analyzing perchlorate in environmental water samples.

Main Methods:

  • Utilized commercially available strong anion exchange (SAX) cartridges for filtering water samples (100-1000 mL).
  • Extracted perchlorate using 4 mL of 1% NaOH after filtration.
  • Developed a cleanup procedure to remove interfering anions (chloride, sulfate, carbonate).
  • Analyzed samples using ion chromatography.

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Main Results:

  • Achieved a method detection limit (MDL) of 0.82 microg/L for perchlorate in deionized water spiked at 2 microg/L using 1 L filtration.
  • MDLs for perchlorate-amended groundwater and surface water were 6.7 microg/L and 2.4 microg/L, respectively, using 200 mL filtration.
  • Initial analysis with a 10-microL loop yielded an MDL of 210 microg/L, highlighting the improvement with SPE.

Conclusions:

  • Strong anion exchange SPE cartridges provide a viable and effective method for low-level perchlorate analysis in water.
  • The developed SPE method is comparable to existing techniques and suitable for environmental monitoring.