Integrated in‐syringe magnetic sheet solid‐phase extraction and dispersive liquid–liquid microextraction for determination of aflatoxins in fresh and moldy breads

Sereshti, Hassan; Khodayari, Farnaz; Nouri, Nayereh

doi:10.1002/jsfa.10109

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…Sample preparation includes methods such as extraction, homogenization, pre‐concentration, the addition of internal standards, defatting and the clean‐up process 11 . The two‐step clean‐ups (combining both liquid extraction and magnetic solid‐phase extraction) have proven to be more efficient for removing interferences 12‐14 . An ideal procedure involves a pre‐liquid–liquid partition step proceeded by clean‐up with packed columns or dispersive solids.…”

Section: Introductionmentioning

confidence: 99%

“…11 The two-step clean-ups (combining both liquid extraction and magnetic solid-phase extraction) have proven to be more efficient for removing interferences. [12][13][14] An ideal procedure involves a pre-liquid-liquid partition step proceeded by cleanup with packed columns or dispersive solids. The isolated analyte is then derivatized to further increase the sensitivity of the analytical method.…”

Section: Introductionmentioning

confidence: 99%

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Dispersive clean‐up process based on a magnetic graphene oxide nanocomposite for determination of 2‐glycerol monopalmitate in olive oil prior to GC‐FID and GC‐MS analysis

Rashidi¹,

Sarabmirza

Ahranjani

et al. 2021

J Sci Food Agric

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BACKGROUND: Recently, methods have been developed for the better quality control, fraud detection and analytical investigation of olive oil. Magnetic graphene oxide (GO) material is known for its reusability, high adsorption capability and stability in food sample preparation. Monopalmitine or 2-glycerol monopalmitate (2-GMP) is one of the main parameters in the quality assay and classification of olive oil, which can be classified as extra virgin ≤ 0.9% and olive pomace ≤ 1.2. Hence, newly synthesized magnetic GO (MGO) and commercial silica-gel were used as a dispersive solid-phase clean-up (d-SPE) sorbent to determine 2-GMP value in olive oil samples prior to gas chromatography (GC) analysis. The d-SPE method is validated with olive oil certified reference material (CRM) with respect to silica-gel and a MGO nanocomposite. RESULTS:The developed d-SPE method was applied for various virgin, refined and pomace olive oil samples to determine the value of 2-GMP%. The presence of 2-GMP in the samples was confirmed by GC-mass spectrometry analysis based on silylation derivatives of the analyte. Finally, the d-SPE-MGO method was determined 2-GMP% as 1.9% for pomace olive oil, 0.6% for refined olive oil, 0.4% for virgin olive oil and 3.1% for CRM. The MGO provided satisfactory clean-up recovery (124%) in the acceptable data range for CRM2018, and silica-gel also provided satisfactory recovery (83%) for CRM2018. The proposed method performed with higher sensitivity and efficiency for screening 2-GMP% in olive oil. CONCLUSION:The MGO based d-SPE method was applied for clean-up purposes to determine 2-GMP%. It proved superior via its advantageous features of super quickness, easy isolation with an external magnet and the highly efficient exclusion of all the coexisting interfering peaks conventionally generated with a standard silica-gel material. These methods based on MGO and silica-gel are reflected in the dispersive mode of extraction and can be used as alternatives to conventional methods. Considering the benefits of the consumption of significantly fewer sorbents and less time required regarding the dispersive methods, the methods can be utilized as alternatives in contrast to conventional techniques.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%