بررسی غلظت نیترات و نیتریت در گوشت قرمز عرضه شده در استان مازندران در سال 1387

Background and purpose:Chemical fertilizers which contain nitrite and nitrate ions contaminate water, soil and plants. The livestock are exposed to the ions through grazing in these areas. This study was designed to evaluate the levels of ions in raw sheep and cow¢s meat in Mazandaran and also, to estimate the dietary intake of the ions from fresh meat consumed in a regular diet. Materials and methods:A total of 36 samples of beef and 36 samples of mutton meat were collected from different cities of Mazandaran province (Sari, Babol and Qaemshahr) and their nitrite and nitrate contents were measured by colorimetric Griess Ilosvay method. Data were statistically analyzed by using Mann Whitney. Results:The mean of nitrate and nitrite in mutton was 4/9 and 0/36 and beef was 6/3 and 0/38 mg/kg. Nitrite and nitrate content in beef and mutton had no significant difference. Conclusion:Considering the recommended consumption of meat groups and their substitutes in the food pyramid, which is 6.5 ounce/daily for those who use 2,500 Kcal/day, it is estimated that the amount of nitrate and nitrite consumed by an adult in all meat groups from red meat, the nitrate intake is higher than in some countries such as the UK, although lower than CONTAM Panel is recommended