title: Iron migration from undamaged and dented juice tinplate cans.
abstract: BACKGROUND
  Iron migration from tinplate cans to pineapple drink was studied over time using flame atomic absorption spectroscopy, taking into consideration storage temperature, sell-by date and can condition (dented/undamaged). An organoleptic test, at the sell-by date, was also performed.
  
  
  RESULTS
  Analysis of iron in drinks from tinplate cans, glass and polyethylene terephthalate (PET) bottles was performed up until the sell-by date. For undamaged canned drinks stored at room temperature, iron was found to remain constant at 0.23 ± 0.01 mg L(-1) , from the 24th day until 1 year after production. Iron found in glass and PET bottles also remained constant until the sell-by date, at 0.15 ± 0.04 and 0.12 ± 0.04 mg L(-1) , respectively. However, migration of iron from dented cans was found to be significant. Twelve months after production, iron content in dented cans, stored at room temperature (22 °C) and in a refrigerator chamber (4 °C) was 14.4 ± 1.0 and 5.5 ± 0.4 mg L(-1) , respectively.
  
  
  CONCLUSIONS
  Results showed that for a 35 kg child the intake of three damaged canned drinks may contribute to more than 50% of the iron provisional maximum tolerance daily intake. © 2015 Society of Chemical Industry.
authors.affiliation: CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Marta Is
authors.initials: MI
authors.lastname: Veríssimo
authors.affiliation: CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Rui Po
authors.initials: RP
authors.lastname: Silva
authors.affiliation: CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Maria Teresa Sr
authors.initials: MT
authors.lastname: Gomes
mesh_terms: D000059:Accidents; D031230:Ananas / Q000737:chemistry; D002648:Child; D005506:Food Contamination; D005513:Food Inspection; D018857:Food Packaging; D061353:Food Storage; D057141:Food, Preserved / Q000032:analysis*; D000067030:Fruit and Vegetable Juices / Q000032:analysis*; D005898:Glass / Q000737:chemistry; D006801:Humans; D007501:Iron / Q000032:analysis / Q000737:chemistry* / Q000506:poisoning; D007700:Kinetics; D011093:Polyethylene Terephthalates / Q000737:chemistry; D011174:Portugal; D012034:Refrigeration; D012677:Sensation; D012995:Solubility; D013232:Steel / Q000737:chemistry*; D013499:Surface Properties; D013649:Taste; D014001:Tin / Q000737:chemistry*
chemical_list: D011093:Polyethylene Terephthalates; D013232:Steel; D014001:Tin; D007501:Iron
keywords: flame atomic absorption spectroscopy; iron migration; pineapple juice; tinplate cans