京津冀三地笼养鸡蛋和柴鸡蛋的脂肪酸养分比较分析

Comparative study on fatty acid of ordinary eggs and native eggs of two brands from Beijing, Tianjin and Baoding city

以北京、天津和保定三个地区某大型超市出售的2种不同品牌鸡蛋(普通鸡蛋和柴鸡蛋)为研究对象,对其蛋品质进行检测分析,利用气相色谱法对蛋黄中ω6和ω3 PUFA(多不饱和脂肪酸)含量进行了测定。结果表明:(1)北京、天津及保定地区总脂肪酸含量在普通鸡蛋中为14.20~24.98 g/100g,柴鸡蛋中为14.64~25.41 g/100g;ω6系PUFAs含量,普通鸡蛋中为2.16~3.99 g/100g,柴鸡蛋中为2.51~4.87 g/100g;ω3系PUFAs含量,普通鸡蛋中为0.19~0.29 g/100g,柴鸡蛋中为0.24~0.37 g/100g;ω6/ω3,普通鸡蛋中为11.18~14.45,柴鸡蛋中为10.56~13.23。普通鸡蛋中ω6/ω3比值北京地区最低,天津次之,保定地区最高;而柴鸡蛋中ω6/ω3比值则是北京地区显著低于天津和保定地区,天津低于保定地区。(2)柴鸡蛋中,北京地区的蛋重和蛋黄指数显著高于天津和保定地区(P<0.05),蛋形指数北京和保定地区显著高于天津地区(P<0.05),哈氏单位保定地区最高,显著高于天津和北京地区(P<0.05),蛋黄颜色和蛋黄比重北京和天津地区显著高于保定地区(P<0.05);普通鸡蛋中,保定地区的蛋重显著高于北京和天津地区(P<0.05),蛋形指数和蛋黄比重差异不显著(P>0.05)。哈氏单位北京地区显著高于天津和保定地区(P<0.05),而蛋黄指数和蛋黄颜色从高到低依次为北京、保定和天津(P<0.05)。

The experiment was conducted to study the qualities and ω6/ω3 PUFAs of two brands of eggs sold from a supermarketin Beijing, Tianjin and Baoding city in order to compare the egg qualities and ω6/ω3 PUFAs of ordinary eggs with native eggs.The results showed that： （1） The contents of total fatty acids is 14.20-24.98 g/100g in ordinary eggs, 14.64-25.41 g/100g in nativeeggs; the contents of ω6 PUFAs is 2.16-3.99 g/100g in ordinary eggs, 2.51-4.87 g/100g in native eggs; the contents of ω3 PUFAsis 0.19-0.29 g/100g in ordinary eggs, 0.24-0.37 g/100g in native eggs; the ratio of ω6/ω3 is 11.18-14.45 in ordinary eggs and10.56-13.23 in native eggs of Beijing, Tianjin and Baoding. The ratio of ω6/ω3 of ordinary eggs from Beijing citywas significantly lower than that from Baoding city（P〈0.05）and was lower than that from Tianjin city（P〉0.05）; The ratioof ω6/ω3 of native eggs from Beijing city was lower than that from Tianjin city and Baoding city （P〉0.05） ; （2） For the ordinaryegg, egg weight from Baoding city was significantly higher than that from Beijing and Tianjin city（P〈0.05）; The difference ofegg shape index and yolk proportion from three cities was not significant（P〉0.05）. Haugh units from Beijing was significantlyhigher than that from Tianjin and Baoding city（P〈0.05）.The native eggs from Beijing city, egg weight and yolk index wassignificantly higher than that from Tianjin and Baoding city（P〈0.05）; Egg shape index from Baoding city was significantlyhigher than that from Beijing and Tianjin city （P〈0.05） ; Haugh unit from Baoding was the highest, significantly higher than thatfrom Tianjin and Beijing（P〈0.05）; Egg yolk color and egg yolk proportion from Beijing and Tianjin city was significantlyhigher than that from Baoding city（P〈0.05）.