目的:通过动物实验,研究长期摄入较低浓度的氟后,机体微量元素含量的变动.方法:生后4周龄雄性大白鼠作为实验组,用2.5ppm 氟溶液混合粉末饲料,对照组用自来水代替氟溶液,饲料与实验组相同,每日摄氟量,实验组0.28μg/g 体重,对照组0.095μg/g 体重,喂养1年,测定 OBJECTIVE: To study the changes of microelement content after a long period of ingestion of fluoride in lower concentration by animal experiments.Methods: Male 4-week-old male rats were used as experimental group, 2.5ppm fluorine solution mixed powder feed was used, while in control group Tap water instead of fluorine solution, the same feed and experimental group, daily intake of fluoride, the experimental group 0.28μg / g body weight, the control group 0.095μg / g body weight, feeding for 1 year, measured