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Measurement of polycyclic aromatic hydrocarbons in canned fish using multi-walled magnetized carbon nanotube and solid phase extraction method
Gholamali Sharifiarab, Mohammad Ahmadi, Nabi Shariatifar, Peiman Ariaii,
Volume 16, Issue 1 (6-2023)
Abstract
Background and Objective: polycyclic aromatic hydrocarbons (PAHs) are compounds with high carcinogenic and mutagenic potential. This study aims to investigate the amount of 16 of these compounds in different types of canned fish.
Materials and Methods: In this research, first, multi-walled carbon nanotubes were magnetized by the MSPE method, and then the synthesized composite was used to extract PAHs from the matrix of canned fish samples. Finally, the concentration of each of these compounds was measured by GC-MS.
Results: The results of this research showed that the highest average amount of total PAHs and PAH4 were 20.22±5.29 and 6.07±1.41 μg/kg, respectively. Also, the highest average amount of benzo[a]pyrene (BaP) found in all samples was 1.34±0.41 μg/kg, which was lower than the existing standards (EU standard for BaP in fish is 2 μg/kg). The amount of these compounds in different types of canned fish were as follows: canned in olive oil > canned with dill > simple canned fish > canned in salt water. And finally, the amount of these compounds in brand A was higher than in other brands.
Conclusion: Based on the findings of this research and since the total average of each of these compounds is lower than the existing standards in different types of canned fish, it can be said that there is no danger to the consumers.
 

Extraction and measurement of phthalate acid esters in milk using carbon nanotube magnetized with iron oxide and through GC-MS device
Sara Mirzaei, Mohammad Ahmadi, Nabi Shariatifar, Peiman Ariaii,
Volume 16, Issue 2 (9-2023)
Abstract
Background and Objective: Today with progress and improvement of knowledge of human in the food industry field, plastic coatings owing to their unique properties, is extensively applied for a package of beverages and food like water and milk. Phthalate esters (PAEs) are applied to increase e sustainability, efficiency and flexibility of materials. Chronic exposure to stated compounds has a role in the occurrence of several types of human illnesses and cancer. The purpose of this study is to investigate the presence and amount of phthalate esters in different types of milk supplied in Tehran city by using magnetized nanotube crane with magnetic iron oxide and through GC-MS device.
Materials and Methods: In this research, multi-walled magnetic carbon nanotubes were synthesized by applying iron oxide and then synthesized magnetic nanotubes were applied for absorption and extraction of PAEs from the matrix of milk samples. The number of samples is 60 and has been selected from Tehran, which has been repeated twice. After the preparation of sample, by using GC-MS, each PAEs concentration was assessed. SPSS software was used for data analysis (Kruskal-Wallis and Kolmogorov–Smirnov tests).
Results: The outcomes of this study indicated the mean of total phthalates and DEHP in all samples was 5.26 (ranged from 2.94-8.39) and 0.97 (ranged from nd-2.05) µg/L, which were lower than the existing standards (DEHP standard in water is equal to 6 µg/L).
Conclusion: According to the current results and with regard to the lower concentration of each PAEs compared with the standard levels in different types of Iranian consumed milk, it can be concluded that there is no hazardous effect for consumers. 
 

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