Magnetic graphene sol-gel hybrid as clean-up adsorbent for acrylamide analysis in food samples prior to GC-MS
Graphene (G) modified with magnetite (Fe3O4) 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 spectrometr...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd.
2018
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/81842/1/WanAiniWanIbrahim2018_MagneticGrapheneSolgelHybridasCleanUp.pdf http://eprints.utm.my/id/eprint/81842/ http://dx.doi.org/10.1016/j.foodchem.2017.06.094 |
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| Institution: | Universiti Teknologi Malaysia |
| Language: | English |
| Summary: | Graphene (G) modified with magnetite (Fe3O4) 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 (R2 = 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 Fe3O4@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 ([C3H5NO]+) and m/z = 55 ([C3H3O]+). |
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