Mineral oil saturated hydrocarbons; Mineral oil aromatic hydrocarbons; Comprehensive two-dimensional gas chromatography; LC-GC × GC; Quantification; Fish Feed; Sample preparation; microwave extraction/saponification
Abstract :
[en] Mineral oil, mainly composed by mineral oil saturated and aromatic hydrocarbons (MOSH and
MOAH), is an ubiquitous food contaminants of high concern in the European Union for it
potential toxicity. Moreover, the analytical procedure for their determination is highly sample
dependent and not robustly validated. High attention is devoted to human food, while oftenreduced attention is paid to animal feed, turning out in higher contamination occurrence.
In this study 22 different fish feed products were selected (7 commercial feed, 5 feedstuff and
10 from sperimental diets). The analysis were performed by both LC-GC-FID as the reference
method and LC-GC×GC-TOFMS/FID for confirmation of the quantity found and a more detailed
characterization of the contamination [1]. The samples were first extracted by performing a
microwave-assisted saponification and simultaneous extraction step, followed by an offline
auxiliary technique, such as epoxidation to remove most of the interferents of the MOAH
fraction and an aluminum oxide purification step when necessary on the MOSH fraction to
remove overloading alkanes. The results indicate a constant contamination of MOSH ranging
between 7 and 30 mg/kg and a contamination of MOAH ranging from 0.5 to 5 mg/kg.
Research center :
Analytical Chemistry Lab at the AgroBioChem Department
Disciplines :
Chemistry
Author, co-author :
Bauwens, Grégory ; Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
Conchione, Chiara; University of Udine > Department of Agri-Food
Moret, Sabrina; University of Udine > Department of Agri-Food
Purcaro, Giorgia ; Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
Language :
English
Title :
QUANTIFICATION AND CHARACTERIZATION OF MINERAL OIL IN FISH FEED BY LC-GC-FID AND LC-GC×GC-TOFMS/FID.
Publication date :
02 July 2021
Number of pages :
381 mm x 677 mm
Event name :
EXTECH XXIII
Event organizer :
University of Alicante University of Balearic islands