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Cadmium determination in natural waters at the limit imposed by European legislation by isotope dilution and TiO2 solid-phase extraction

Garcia-Ruiz, Silvia ; Petrov, Ivan ; Vassileva, Emilia ; Quetel, Christophe Garcia-Ruiz, Silvia (correspondence author)

Analytical and Bioanalytical Chemistry, November 2011, Vol.401(9), pp.2785-2792 [Peer Reviewed Journal]

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  • Title:
    Cadmium determination in natural waters at the limit imposed by European legislation by isotope dilution and TiO2 solid-phase extraction
  • Author: Garcia-Ruiz, Silvia ; Petrov, Ivan ; Vassileva, Emilia ; Quetel, Christophe
  • Garcia-Ruiz, Silvia (correspondence author)
  • Subjects: Uncertainty ; Separation ; Isotopes ; Titanium Dioxide ; Extraction ; Guidelines ; Standards ; Cadmium
  • Is Part Of: Analytical and Bioanalytical Chemistry, November 2011, Vol.401(9), pp.2785-2792
  • Description: The cadmium content in surface water is regulated by the last European Water Framework Directive to a maximum between 0.08 and 0.25 mu g L-1 depending on the water type and hardness. Direct measurement of cadmium at this low level is not straightforward in real samples, and we hereby propose a validated method capable of addressing cadmium content below mu g L-1 level in natural water. It is based on solid-phase extraction using TiO2 nanoparticles as solid sorbent (0.05 g packed in mini-columns) to allow the separation and preconcentration of cadmium from the sample, combined to direct isotope dilution and detection by inductively coupled plasma mass spectrometry (ID-ICP-MS). The extraction setup is miniaturised and semi-automated to reduce risks of sample contamination and improve reproducibility. Procedural blanks for the whole measurement process were 5.3?2.8 ng kg-1 (1 s) for 50 g of ultrapure water preconcentrated ten times. Experimental conditions influencing...
  • Language: English
  • Identifier: ISSN: 1618-2642 ; DOI: 10.1007/s00216-011-5256-0
  • Source: © ProQuest LLC All rights reserved
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