保定学院（Baoding University）是经教育部批准建立的全日制普通本科院校。学校前身是始建于1904年的“保定初级师范学堂”。1910年改称“直隶第二初级师范学堂”，1928年随省易名为“河北省立第二师范学校”。新中国成立后定名“河北省立保定师范学校”，1978年改建“保定师范专科学校”，2007年升格为本科层次的普通高校，并更名为“保定学院”。2016年，学校成为河北省省级硕士立项建设单位。 截至2020年6月，学校占地920.2亩，已建成34.39万平方米；有本科专业50个，专科专业3个；图书馆藏有纸质文献140万余册，教职工970人（专任教师685人），全日制本专科在校生15000余人。
A solid-phase extraction(SPE)method utilizing an iminodiacetic acid-based chelating resin as the stationary phase was developed for the determination of 14 rare earth elements in seawater by inductively coupled plasma mass spectrome-try(ICP-MS).Adjust the pH value of water sample to the range of 8.5～9.0,followed by adsorption and enrichment of the target elements through solid-phase extraction.The detection limit of rare earth elements was 0.017 μg/L～0.024 μg/L,the relative standard deviation(RSD)of the method was 2.7％～4.8％,the recovery rates of spiking was 81.4％～105.0％.The proposed methodology is characterized by operational simplicity,high sensitivity,and efficiency,yielding highly satisfactory experimental results.
The split classroom divides "teaching" and "learning", which changes the traditional relationship between "teaching" and "learning", and is conducive to cultivating students’ academic literacy. In the teaching of design courses in colleges and universities, the five-tier progressive split classroom teaching mode cultivates students’ image literacy with rich learning resources, cultivates students’ aesthetic judgment literacy with diversified learning objectives, cultivates students’ technical performance literacy with real learning experience, cultivates students’ cultural understanding literacy with flexible learning methods, and cultivates students’ creative practice literacy with a virtual and real learning environment. The specific teaching strategies include clear guidance list, "precise speaking" and "blank", "bright test help" notes, collaborative discussion,project practice, multi-dimensional and multi-level talent evaluation.
