Trace analysis of Pb(II) in milk samples by Fe 3 O 4 @SiO 2 @3-chloropropyltriethoxysilane@o-phenylendiamine nanoparticles as an unprecedented adsorbent for magnetic dispersive solid phase extraction

Micro & nano letters

article

Mohtaram Ramezanpour¹  Shahram Naghizadeh Raeisi¹  Seyed Ahmad Shahidi¹  Sorour Ramezanpour² 

[1] Department of Food Science and Technology, Ayatollah Amoli Branch, Islamic Azad University;Faculty of Chemistry, K.N. Toosi University of Technology

关键词: nanoparticles;    desorption;    organic compounds;    food safety;    atomic absorption spectroscopy;    pH;    chromatography;    dairy products;    adsorption;    trace analysis;    unprecedented adsorbent;    magnetic dispersive solid phase extraction;    solid-phase extraction method;    flame atomic absorption spectrometry;    preconcentration;    extraction procedure;    extraction efficiency;    eluent time;    desorption time;    face-centred central composite design;    sample analysis;    bovine milk samples;   

DOI  :  10.1049/mnl.2019.0577

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In the present work, a magnetic dispersive solid-phase extraction method followed by flame atomic absorption spectrometry was used for extraction, preconcentration and determination of trace amounts of Pb(II) in milk samples. Fe 3 O 4 @SiO 2 @3-chloropropyltriethoxysilane@o-phenylendiamine nanoparticles were synthesised and used as the adsorbent in the extraction procedure. The effective parameters of the extraction efficiency comprising pH of the sample solution, sorbent amount, extraction time, acidic concentration of the eluent and desorption time were optimised using a face-centred central composite design. Under the optimal conditions, the applied method offered suitable linearity in the range of 2.0–250 ng mL −1 , the limit of detection as low as 0.11 ng mL −1 , and high preconcentration factor of 66. The precision of the proposed method was evaluated by calculating the intra-day and inter-day relative standard deviation, which were <3.4 and 5.5%, respectively. The applicability of the method in real sample analysis was tested by analysing bovine milk samples. The relative recoveries in the range of 81.6–97.2% showed the suggested method is of appropriate accuracy in real sample analysis.

【 授权许可】

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