title: Study of the Migration of Stabilizer and Plasticizer from Polyethylene Terephthalate into Food Simulants.
abstract: This study investigates the determination and migration of stabilizers and plasticizers from polyethylene terephthalate (PET). Two methods [ultrasonic extraction with dichloromethane or methanol and total dissolution with phenol/tetrachloroethane (m:m/1:1)] for pre-concentration of additives in PET material were performed. The diffusion of these additives from PET was evaluated by immersing in deionized water, acetic acid 3% (w/v), ethanol 20% (v/v), ethanol 50% (v/v) and isooctane at 20, 40, 55 and 70°C, respectively. The amount of additives in PET and food simulants was quantified by high-performance liquid chromatography-photodiode array detector (HPLC-PDA). The optimized HPLC method showed high correlation coefficients (R ≥ 0.9993), good precision, accuracy and reproducibility. Experimental diffusion coefficients (DP) were calculated according to a mathematical model based on Fick's second law, and the DP values of considered compounds ranged from 9.8 × 10(-15) to 1.4 × 10(-8) cm(2) s(-1) The experimental DP values were also compared with that predicted by currently used diffusion models. In addition, the effect of temperature on the diffusion rate was assessed. The effect of temperature on the diffusion coefficients followed an Arrhenius-type model with active energies ranged from 40.4 to 113.8 kJ mol(-1) for the target compounds.
authors.affiliation: Packaging Engineering Institute, Jinan University, Zhuhai 519070, China Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai 519070, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Li
authors.affiliation: Packaging Engineering Institute, Jinan University, Zhuhai 519070, China Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai 519070, China wangzw@jnu.edu.cn.
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Wang
authors.affiliation: Packaging Engineering Institute, Jinan University, Zhuhai 519070, China Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai 519070, China.
authors.forename: Qin-Bao
authors.initials: QB
authors.lastname: Lin
authors.affiliation: Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai 519070, China Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China.
authors.forename: Chang-Ying
authors.initials: CY
authors.lastname: Hu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004058:Diffusion; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis; D018857:Food Packaging; D008962:Models, Theoretical; D010968:Plasticizers / Q000032:analysis*; D011093:Polyethylene Terephthalates / Q000032:analysis* / Q000737:chemistry; D015203:Reproducibility of Results; D013696:Temperature
chemical_list: D010968:Plasticizers; D011093:Polyethylene Terephthalates