Study of the migration phenomena of specific metals in canned tomato paste before and after opening. Validation of a new quality indicator for opened cans

Kalomoira G Raptopoulou; Ioannis N Pasias; Nikolaos S Thomaidis; Charalampos Proestos

doi:10.1016/j.fct.2014.03.023

Study of the migration phenomena of specific metals in canned tomato paste before and after opening. Validation of a new quality indicator for opened cans

Food Chem Toxicol. 2014 Jul:69:25-31. doi: 10.1016/j.fct.2014.03.023. Epub 2014 Mar 26.

Authors

Kalomoira G Raptopoulou¹, Ioannis N Pasias², Nikolaos S Thomaidis², Charalampos Proestos³

Affiliations

¹ National and Kapodistrian University of Athens, Department of Chemistry, Food Chemistry Laboratory, Panepistimiopolis Zografou, 15771 Athens, Greece.
² National and Kapodistrian University of Athens, Department of Chemistry, Laboratory of Analytical Chemistry, Panepistimiopolis Zografou, 15771 Athens, Greece.
³ National and Kapodistrian University of Athens, Department of Chemistry, Food Chemistry Laboratory, Panepistimiopolis Zografou, 15771 Athens, Greece. Electronic address: harpro@chem.uoa.gr.

PMID: 24680799
DOI: 10.1016/j.fct.2014.03.023

Abstract

A method for the simultaneous determination of Cd-Pb, As-Cu, Cr-Ni and Fe-Mn in canned tomato paste samples by Electrothermal Atomic Absorption Spectrometry was developed and validated. The validation procedure was conducted according to the terms of the European regulation for the official control of contaminants in foods. The validated method was applied for the determination of these metals and metalloids in 13 different tomato paste samples and the results showed that Cd content was higher than the maximum permissible value of 0.050 mg kg(-1) as proposed in European Regulation (EC) No 1881/2006 concerning fresh fruits and vegetables. Furthermore, a new quality indicator was evaluated in order to provide information about tomato paste quality and the appropriate storage time of an opened canned tomato paste. Finally, a migration test was accomplished based on the calculation of mass balance and the comparison of the elemental content in canned tomato paste samples and in aseptic paper pack and it was proved that Fe and Pb were the main metals migrating in tomato paste samples.

Keywords: ETAAS; Metal migration; Quality indicator; Tomato paste samples; Uncertainty calculation.

MeSH terms

Food Contamination / analysis*
Food Preservation / methods*
Food Quality
Food Storage
Metals / analysis*
Quality Improvement
Reproducibility of Results
Solanum lycopersicum*
Spectrophotometry, Atomic / methods*
Time Factors

Substances

Metals