Cristina Sobrado

ANFACO-CECOPESCA, Vigo, Galicia, Spain

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Publications (4)5.71 Total impact

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    ABSTRACT: Migration of potentially toxic materials used for the lining of commercial can goods remains an important issue, especially with respect to certain types of processed foods. Seafood is one type where more information is needed with respect to other ingredients used for adding value to fishery products. Most cans are internally coated with starters of resins such as bisphenol A diglycidyl-ether (BADGE) and bisphenol F diglycidyl-ether (BFDGE), both considered as toxic compounds. Several seafood products, sardines, tuna fish, mackerel, mussels, cod and mackerel eggs, were manufactured in different conditions changing covering sauce, time and temperature of storage and heat-treated for sterilization in cans. Migration kinetics of BADGE and BFDGE from varnish into canned products were evaluated by HPLC in 70 samples after 6, 12 or 18 months of storage. Results showed that there is no migration of BADGE in tuna fish, sardines, mussels or cod. However, migration of BFDGE occurs in all species, in a storage time-dependent way and content of fat, although migration of these compounds is not affected by sterilization conditions. All samples analyzed presented values lower than 9 mg BADGE/kg net product without exceeding European limits. However, concerning BFDGE migration, European legislation does not allow the use and/or the presence of BFDGE. Main migration takes place in mackerel reaching the highest values, 0.74 mg BFDGE/kg and 0.34 mg BADGE/kg net product, in red pepper sauce.
    No preview · Article · Jun 2008 · Food and Chemical Toxicology
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    ABSTRACT: The human population is exposed to dioxins (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) mainly through diet; bioaccumulation and biomagnification in aquatic environment results in fishery products and by-products being an important vector to humans. The determination of PCDD/Fs and dl-PCBs in fillets of young turbots (Psetta maxima) (0-2 years) from aquaculture plant (Galicia, Spain) (N = 21) and in feeding stuffs were carried out, and dietary accumulation values and lipid-normalized biomagnification factors (BMF) relating concentration in fish and in feed were calculated. Levels found in feeding stuffs (0.5 pg TEQ-PCDD/F/g and 1.6 pg TEQ-dl-PCB/g), and turbots (0.13-0.27 pg TEQ-PCDD/F/g fresh weight and 0.35-1.2 pg TEQ-dl-PCB/g fresh weight) were below maximum permitted levels set by EC. Levels of toxic compounds in feeding stuff are reflected in fish fillets; predominant isomers are 2,3,7,8-TCDF, OCDD, 1,2,3,7,8-PeCDF, 2,3,4,7,8-PeCDF and 1,2,3,4,6,7,8-HpCDD, and PCBs 118, 105, 156 and 167. Relevant compounds accounting for total toxicity are the same congeners in feeding stuff and turbots: 2,3,4,7,8- PeCDF; 2,3,7,8-TCDF; 2,3,7,8-TCDD and 1,2,3,7,8-PeCDD, and PCB 126. Higher accumulation efficiency values were obtained for dl-PCBs (30-46%); tetra- and penta-chloro substituted PCDD/Fs showed the highest values (27-34%) of the PCDD/F group. Biomagnification was shown for these compounds (BMF around 1.5).
    Full-text · Article · May 2007 · Food Additives and Contaminants
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    ABSTRACT: Polycyclic aromatic hydrocarbons (PAH) determination in a food matrix is a topic of interest for routine quality control or screening analyses. For currently available methods, sample preparation is laborious and time-consuming.The determination of PAH in fishery products developed in this paper is based on Conte and Moret's method for vegetable oils. Fat is extracted from 2 g of dehydrated sample, through a chromatographic column using a mixture of pentane:dichloromethane (1:1). The sample is evaporated and redissolved in 10 mL of n-hexane. A 1 mL aliquot is loaded onto a 5 g silica cartridge, then the PAH fraction is eluted with n-hexane: dichloromethane (70:30). After solvent evaporation, the residue is re-dissolved in acetonitrile and injected into an HPLC equipped with a C18 phase reverse column and a spectrofluorometric detector.Tested fishery products show recovery rates ranging between 70 and 125%. Statistical studies demonstrate that PAH recovery is independent of the sample matrix.
    No preview · Article · Nov 2004 · Journal of Aquatic Food Product Technology
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42 Citations
5.71 Total Impact Points

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  • 2008
      Vigo, Galicia, Spain