Magnetic graphene sol–gel hybrid as clean-up adsorbent for acrylamide analysis in food samples prior to GC–MS. (15th January 2018)

• Record Type: Journal Article
• Authors: Rashidi Nodeh, Hamid; Wan Ibrahim, Wan Aini; Kamboh, Muhammad Afzal; Sanagi, Mohd Marsin
• Is Part Of: Food chemistry. Volume 239(2018)
• Page Start: 208
• Page End: 216
• Publication Date: 2018-01-15
• Subjects: TEOS-MTMOS tetraethoxysilane-methyltrimethoxysilane -- QuEChERS quick easy cheap effective rugged and safe -- RP-MSPE reverse phase magnetic solid phase extraction -- GC-MS gas chromatography mass spectrometry -- JECFA Joint Expert Committee on Food Additives -- FAO Food and Agriculture Organization -- WHO World Health Organization; Acrylamide -- Clean-up -- Graphene-based sol–gel hybrid adsorbent -- Magnetic solid phase extraction -- GC–MS -- Food samples; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2017.06.094
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Fe3 O4 @G-TEOS-MTMOS as clean-up adsorbent for direct GC–MS acrylamide analysis. The proposed method allows efficient clean-up without derivatization. The developed method achieved low limits of detection (0.061–2.89 µg kg −1 ). The proposed method provided high recoveries (82.7–105.2%) in real food samples. Fe3 O4 @G-TEOS-MTMOS RP-MSPE method has the advantages of rapidity and reliability. Abstract: Graphene (G) modified with magnetite (Fe3 O4 ) and sol–gel hybrid tetraethoxysilane-methyltrimethoxysilane (TEOS-MTMOS) was used as a clean-up adsorbent in magnetic solid phase extraction (MSPE) for direct determination of acrylamide in various food samples prior to gas chromatography-mass spectrometry analysis. Good linearity ( R 2 = 0.9990) was achieved for all samples using matrix-matched calibration. The limit of detection (LOD = 3 × SD/m ) obtained was 0.061–2.89 µg kg −1 for the studied food samples. Native acrylamide was found to be highest in fried potato with bright-fleshed (900.81 µg kg −1 ) and lowest in toasted bread (5.02 µg kg −1 ). High acrylamide relative recovery (RR = 82.7–105.2%) of acrylamide was obtained for spiked (5 and 50 µg kg −1 ) food samples. The Fe3 O4 @G-TEOS-MTMOS is reusable up to 7 times as a clean-up adsorbent with good recovery (>85%). The presence of native acrylamide was confirmed by mass analysis at m / z = 71 ([C3 H5 NO] + ) and m / z = 55 ([C3 H3 O] + ).