Nectarine Core-derived Magnetite Biochar for Ultrasound-assisted Preconcentration of Polycyclic Aromatic Hydrocarbons (PAHs) in Tomato Paste: A Cost-effective and Sustainable Approach

Overview

Journal Food Chem X

Date 2024 Sep 23

PMID 39310888

Authors

Ali Azari

Hossein Kamani

Maryam Sarkhosh

Neda Vatankhah

Mahmood Yousefi

Hadi Mahmoudi-Moghaddam

Seyed Ali Razavinasab

Mahmood Reza Masoudi

Reza Sadeghi

Nafiseh Sharifi

Kamyar Yaghmaeain

Affiliations

Soon will be listed here.

Abstract

A novel ultrasound-assisted magnetic solid-phase extraction coupled with gas chromatography-mass spectrometry (US-MSPE-GC/MS) was developed to detect trace amounts of polycyclic aromatic hydrocarbons (PAHs) in tomato paste, using a magnetic biochar adsorbent derived from nectarine cores. The highest extraction recovery was attained under 10 mg adsorbent mass, 30 min extraction time, 9 % (/) sodium chloride, and elution with 200 μL of dichloromethane. Under optimum conditions, the method demonstrated excellent linearity (R > 0.992) across a wide concentration range (0.01-100 ng g) with high sensitivity (LODs: 0.028-0.053 ng g, LOQs: 0.094-0.176 ng g) and good repeatability (RSDs <5.96 %). The application of the US-MSPE-GC/MS method was tested on four brands of real tomato paste and no PAHs were detected in unspiked samples, indicating no background contamination. This method showed high relative recoveries 88.03-98.52 %) and good reproducibility (<9.19 %.) at two concentration levels, confirming its effectiveness for PAH analysis in real samples.

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