Mahmood Alimohamadi, Ebrahim Molaee Aghaee, Ramin Nabizadeh Nodehi, Gholam Reza Jahed, Sasan Rezaee, Akbar Goldasteh, Shahrokh Nazmara, Hassan Aslani,
Volume 5, Issue 2 (10-2012)
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Background and Objectives: Heavy metals including antimony and cobalt as two
contaminant factors leach from polyethylene terephthalate packages into water
under some conditions. Therefore, their detection was concerned at different
storage conditions.
Materials and Methods: Five time-temperature treatments were carried out for 5 water samples. Storage
conditions were defined as following: at outdoor and sunlight ambient
temperature, room temperature, and at 40˚C at different intervals for 8 weeks,
at 65˚C for 6 weeks and 80˚C for 7 days. Detection was performed by ICP-AES
method and the data analysis was processed by SPSS software.
Results: Antimony
concentration increased by storage time at all temperatures and for all
samples, however enhancing proportion was different in samples. At outdoor,
40˚C and room temperature, concentration increase was below the MCL by the end
of storage period. But at 65˚C and 85˚C, antimony concentration exceeded MCL by
study time and the difference between samples 4 and 5, for example, was
significant (p≤0.05). Cobalt concentration at the beginning and during the
study was also too less and lower than the detection limit.
Conclusion: By
increasing temperature and time, leaching of antimony into water increases.
Moreover, sunlight has effect but not noticeable at the temperature of present
study. In this study, blue or clear packaging had no significant effect on
antimony leakage (P>0.05).
