title: 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.
abstract: A UV Fenton-like digestion method was developed first time for a complete digestion of milk samples by using 1.6 g L(-1) Fe3O4 magnetic nanoparticles, 0.2% (v/v) nitric acid, and 6% (w/w) H2O2. During the digestion, the liberated As-, Sb-, and Bi-containing species were preconcentrated onto the surface of Fe3O4 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.
authors: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University , Chengdu, Sichuan 610064, People's Republic of China.
authors: Xi
authors: X
authors: Ai
authors: Li
authors: L
authors: Wu
authors: Mengni
authors: M
authors: Zhang
authors: Xiandeng
authors: X
authors: Hou
authors: Lu
authors: L
authors: Yang
authors: Chengbin
authors: C
authors: Zheng
mesh_terms: D000818:Animals; D000965:Antimony / Q000737:chemistry* / Q000302:isolation & purification; D001151:Arsenic / Q000737:chemistry* / Q000302:isolation & purification; D001729:Bismuth / Q000737:chemistry* / Q000302:isolation & purification; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D058185:Magnetite Nanoparticles / Q000737:chemistry; D008892:Milk / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D058185:Magnetite Nanoparticles; D000965:Antimony; D006861:Hydrogen Peroxide; D007501:Iron; D001151:Arsenic; D001729:Bismuth