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Determination of cadmium, lead and mercury residual levels in meat of canned light tuna (Katsuwonus pelamis and Thunnus albacares) and fresh little tunny (Euthynnus alletteratus) in Libya.

Abolghait SK, Garbaj AM - Open Vet J (2015)

Bottom Line: Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety.The results indicated that Hg had the highest concentration level and Cd had the lowest concentration level either in tested canned tuna or fresh little tunny samples.Results of the current surveillance indicated that canned skipjack and yellowfin tuna sold in Tripoli markets show contaminant levels well under the European thresholds adopted for Cd, Pb and Hg.

View Article: PubMed Central - PubMed

Affiliation: Department of Food Hygiene and Control, Faculty of Veterinary Medicine, University of Tripoli, P. O. Box 13662, Tripoli, Libya ; Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Suez Canal University, 41522 Ismailia, Egypt.

ABSTRACT
Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety. Hg, Pb and Cd contaminants were monitored in a total of 60 specimens of fresh little tunny (Euthynnus alletteratus) and popular brands of skipjack and yellowfin (Katsuwonus pelamis and Thunnus albacares) canned tuna commercially available in Tripoli, Libya. Direct Mercury Analyzer (DMA-80) was implemented for determination of total Hg level and graphite furnace atomic absorption spectrometry (GFAAS) was employed for determination of Cd and Pb concentrations. The results indicated that Hg had the highest concentration level and Cd had the lowest concentration level either in tested canned tuna or fresh little tunny samples. The average concentration of Hg in fresh little tunny samples was 1.185 ± 0.968 mg kg(-1) wet weight (ww) and often exceeded the standard permissible limit. In addition, canned yellowfin tuna had the lowest levels of Cd (0.027 ± 0.026 mg kg(-1) ww), Pb (0.075 ± 0.071) and Hg (0.163 ± 0.122 mg kg(-1) ww). Results of the current surveillance indicated that canned skipjack and yellowfin tuna sold in Tripoli markets show contaminant levels well under the European thresholds adopted for Cd, Pb and Hg. However, consumption of large quantities of Mediterranean little tunny products significantly increases human exposure to the risk of Hg toxicity.

No MeSH data available.


Related in: MedlinePlus

Mean values of Cd, Pb and Hg in tested tuna samples. Error bars represent 95% confidence interval. Asterisks indicate statistical significance (p < 0.05).
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Figure 1: Mean values of Cd, Pb and Hg in tested tuna samples. Error bars represent 95% confidence interval. Asterisks indicate statistical significance (p < 0.05).

Mentions: The average value of Cd in canned yellowfin samples (0.027 ± 0.026 mg kg-1 wet weight (ww)) was significantly lower than canned skipjack samples (0.079 ± 0.058 mg kg-1 ww) and fresh little tunny samples (0.072 ± 0.027 mg kg-1 ww) (Table 1). However, no significant difference was found between mean values of Cd in canned skipjack and fresh little tunny samples (Fig. 1).


Determination of cadmium, lead and mercury residual levels in meat of canned light tuna (Katsuwonus pelamis and Thunnus albacares) and fresh little tunny (Euthynnus alletteratus) in Libya.

Abolghait SK, Garbaj AM - Open Vet J (2015)

Mean values of Cd, Pb and Hg in tested tuna samples. Error bars represent 95% confidence interval. Asterisks indicate statistical significance (p < 0.05).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4663797&req=5

Figure 1: Mean values of Cd, Pb and Hg in tested tuna samples. Error bars represent 95% confidence interval. Asterisks indicate statistical significance (p < 0.05).
Mentions: The average value of Cd in canned yellowfin samples (0.027 ± 0.026 mg kg-1 wet weight (ww)) was significantly lower than canned skipjack samples (0.079 ± 0.058 mg kg-1 ww) and fresh little tunny samples (0.072 ± 0.027 mg kg-1 ww) (Table 1). However, no significant difference was found between mean values of Cd in canned skipjack and fresh little tunny samples (Fig. 1).

Bottom Line: Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety.The results indicated that Hg had the highest concentration level and Cd had the lowest concentration level either in tested canned tuna or fresh little tunny samples.Results of the current surveillance indicated that canned skipjack and yellowfin tuna sold in Tripoli markets show contaminant levels well under the European thresholds adopted for Cd, Pb and Hg.

View Article: PubMed Central - PubMed

Affiliation: Department of Food Hygiene and Control, Faculty of Veterinary Medicine, University of Tripoli, P. O. Box 13662, Tripoli, Libya ; Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Suez Canal University, 41522 Ismailia, Egypt.

ABSTRACT
Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety. Hg, Pb and Cd contaminants were monitored in a total of 60 specimens of fresh little tunny (Euthynnus alletteratus) and popular brands of skipjack and yellowfin (Katsuwonus pelamis and Thunnus albacares) canned tuna commercially available in Tripoli, Libya. Direct Mercury Analyzer (DMA-80) was implemented for determination of total Hg level and graphite furnace atomic absorption spectrometry (GFAAS) was employed for determination of Cd and Pb concentrations. The results indicated that Hg had the highest concentration level and Cd had the lowest concentration level either in tested canned tuna or fresh little tunny samples. The average concentration of Hg in fresh little tunny samples was 1.185 ± 0.968 mg kg(-1) wet weight (ww) and often exceeded the standard permissible limit. In addition, canned yellowfin tuna had the lowest levels of Cd (0.027 ± 0.026 mg kg(-1) ww), Pb (0.075 ± 0.071) and Hg (0.163 ± 0.122 mg kg(-1) ww). Results of the current surveillance indicated that canned skipjack and yellowfin tuna sold in Tripoli markets show contaminant levels well under the European thresholds adopted for Cd, Pb and Hg. However, consumption of large quantities of Mediterranean little tunny products significantly increases human exposure to the risk of Hg toxicity.

No MeSH data available.


Related in: MedlinePlus