SUMMARY
Minerals and vitamins in yellow fin tuna (Thunnus albacares) oil canned, from the Mexican Pacific
Tuna is one of the most consumed sea food in Mexico due to it' s abundance and low cost. The micronutrient content was evaluated in yellow fin tuna (Thunnus albacares) canned in vegetable oil (7 samples with 5 repetitions). Tuna proced from differents areas in the coast of the Pacific, Baja California Sur (Ll), Mazatlan (L2) and Colima (L3). The approximate chemical analysis was carried out by the methods of AOAC; minerals (Ca, P, Mg, Na, K, Fe, Zn, Cu, Cd, Cr an Pb) by atomic absorption spectrophotometry and vitamins by HPLC. The percentage of moisture was among 65-75%, crude protein (12.6- 16.4%) and ether extract, the fraction with most variation among locations, was (7.1-15.9%). Niacin was the most abundant vitamin (4.8-16.5 mg/100g); mean Vitamin A (UI/100g) in L1 and L2 was similar (36.5 and 36.2), and higher in L3 (42.0). The most abundant mineral s were Na(136-552 mg/100g) and K (78-221 mg/100g), from this, the widest range of N a and K were found in L1, while L2 was for P. Ca (mg/100g) showed different mean values between L1 (6.9) and L2 (12.7) and in L3 the range was extensive (3.4-21.8). Zn was low in L2 (0.2-0.4 mg/100g) and higher in L3 (0.54-0.70 mg/100g). Mg and Cu were the mineral with the narrowest range and with mean values similar among locations. Pb, Cd and Crwerenot detected. The mineral with the highest variation among locations were Ca, Na and Zn; and among commercial brands were Fe, Na, K and Ca. Vitamin A, Cu and Mg showed the least variation between locations. It is concluded that the.yel1ow fin tuna pro vides important amounts of ether extract, Na, K, P and niacin.

Key words: Mineral, vitamints, tuna (Thunnus albacares), Mexican Pacifico.



Recibido: 06/05/1998
Aceptado: 27/07/1998

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