Studying of some chemical and qualitative characters of some frozen fish meat imported to Iraq

Abstract

This study conducted to investigate the validity of the three species of frozen fish imported to Iraq a whole trout fish “Oncorhynchus mykiss” “mersin” mark, catfish without head Pangasius hypophthalmus “sayad” mark and catfish fillets (same species) “fakher” mark which purchased from three areas in Baghdad, Amiriya, Adhamiya and Baya through chemical and qualitative analysis of the frozen fish samples as it has been estimating the percentage of moisture, protein, fat, ash, the amount of contaminated metals (A copper and lead) and find out the amount of histamine. The results showed that the moisture content of the samples of whole trout fish were 72.06 ±0.33, 72.00±0.31 and 71.86 ±0.23% in Adhamiya, Amiriya and Baya respectively, But in the catfish without head were 76.14 ±0.29, 75.57 ± 0.23 and 74.88 ±0.25% in Baya, Amiriya and Adhamiya, respectively, where catfish fillets 81.30 ± 1.20, 80.33 ±1.21 and 80.30 ±1.24% in Baya, Adhamiya, Amiriya respectively. The percentages of protein for whole trout fish samples 21.50 ±0.17, 21.25 ±0.11 and 21.18 ±0.21 % in Adhamiya, Baya and Ameriya respectively, and in the catfish without head 17.55 ±0.11, 17.51 ±0.10 and 17.31 ±0.10 % in Adhamiya, Amiriya and Baya respectively, while they were in catfish fillets 16.81 ±0.11, 16.75 ±0.14 and 16.67 ±0.14 % in Baya, Amiriya and Adhamiya, respectively. The results also showed that the samples were free of lead contamination but the amount of copper for the whole trout fish were 1.55 ±0.02, 1.41 ±0.09 and 1.29 ±0.10 mgkg in Amiriya, Adhamiya and Baya respectively, and in catfish without head 1.31 ±0.17, 1.04 ±0.14 and 0.87 ±0.01 mgkg in Baya, Adhamiya and Amiriya respectively, but in the catfish fillets were 1.50 ±0.21, 1.29 ±0.06 and 1.18 ±0.13 mgkg in Adhamiya, Amiriya and Baya respectively. The results indicated that the histamine in whole trout fish were 7.84 ±0.38, 7.69 ±0.33 and 7.55 ±0.40 mgkg in Adhamiya, Amiriya and Baya respectively, but in catfish without head 9.43 ±1.10, 8.06 ±0.64 and 5.93 ±0.31 mgkg in Adhamiya, Baya and Ameriya respectively, while in the catfish fillets were 5.85 ±0.12, 5.55 ±0.09 and 5.51 ±0.07 mgkg in Adhamiya, Amiriya and Baya respectively. In conclusion of this study, the results of chemical and qualitative tests of some frozen fish samples imported to Iraq have proven the validity of the studied samples for human consumption after comparing them with the values of the standard specifications of the Iraqi and international adopted