Mineral Intake in Urban Pregnant Women from Base Diet,Fortified Foods,and Food Supplements:Focus on Calcium,Iron,and Zinc

In the Chinese national nutrition surveys, fortified foods were not investigated separately from the base diet, and the contribution of fortified foods to micronutrients intake is not very clear. This study investigated the diet, including fortified foods and food supplements, of urban pregnant women and analyzed the intake of calcium, iron,and zinc to assess the corresponding contributions of fortified foods, food supplements, and the base diet. The results demonstrated that the base diet was the major source of calcium, iron, and zinc, and was recommended to be the first choice for micronutrients intake. Furthermore, consumption of fortified foods and food supplements offered effective approaches to improve the dietary intake of calcium, iron, and zinc in Chinese urban pregnant women.

高效液相色谱-柱后光化学衍生-荧光检测法测定强化食品中的叶酸

目的建立柱后光化学衍生一高效液相色谱法（HPLC）测定强化食品中叶酸的分析方法。方法采用SunFireC18（4．6mm×250mm，5μm）色谱柱，以乙腈-50mmol／L磷酸二氢钾溶液（pH=5．0）为流动相梯度洗脱，叶酸在254nm紫外光照射下进行柱后衍生，荧光检测器检测，激发和发射波长分别为344和428nm。结果本方法的线性范围为0．01～2．0μg／ml，r=0．9999；方法的定性检出限和定量检出限分别为0．01和0．03μg／g；加标回收率为90．0％．98．0％，RSD均小于5％。结论本方法简便、快速、准确、重现性好，适用于强化食品中叶酸含量的测定。