Analytical method for the determination of trace toxic elements in milk based on combining Fe3O4 nanoparticles accelerated UV fenton-like digestion and solid phase extraction

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DOIResolve DOI: http://doi.org/10.1021/jf501638k
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TypeArticle
Journal titleJournal of Agricultural and Food Chemistry
ISSN0021-8561
Volume62
Issue34
Pages85868593; # of pages: 8
SubjectAntimony; Bismuth; Effluent treatment; Hydrides; Magnetic separation; Nanoparticles; Phase separation; Certified reference materials; Chemical consumption; Fenton reactions; Hydride generations; Magnetic nano-particles; Sample pretreatment; Solid-phase extraction; Spectrometric detection; Trace elements
AbstractA UV Fenton-like digestion method was developed first time for a complete digestion of milk samples by using 1.6 g L-1 Fe3O 4 magnetic nanoparticles, 0.2% (v/v) nitric acid, and 6% (w/w) H 2O2. During the digestion, the liberated As-, Sb-, and Bi-containing species were preconcentrated onto the surface of Fe 3O4 magnetic nanoparticles, which were conveniently separated with a hand-held magnet and subsequently dissolved in hydrochloric acid prior to hydride generation atomic fluorescence spectrometric detection. Owing to the integration of UV Fenton-like digestion, solid phase extraction, and magnetic separation into a single step, the developed method significantly simplifies sample preparation steps and reduces chemical consumption and hazardous waste. Limits of detection of 0.0015, 0.0022, and 0.0025 μg L -1 were obtained for As, Sb, and Bi, respectively, using a 50 mL milk sample. The method was applied to the determination of these elements in a Certified Reference Material and milk samples.
Publication date
PublisherACS Publications
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards
Peer reviewedYes
NPARC number21272802
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Record identifierf307ae90-7bbc-4e76-a3fe-69ad4fefa6fd
Record created2014-12-03
Record modified2016-05-09
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