文章基本信息

标题：TEACHING CHROMATOGRAPHY IN SECONDARY SCHOOL - AN INVESTIGATION CONCERNING GRADE, CONTEXT, CONTENT, EXPERIMENTS AND MEDIA
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作者：Julia Lorke ; Katrin Sommer
期刊名称：Problems of Education in the 21st Century
印刷版ISSN：1822-7864
电子版ISSN：1822-7864
出版年度：2010
卷号：19
页码：63-69
语种：
出版社：Scientia Socialis
摘要：This investigation focuses on how one of the best established and most efficient methods for the separation of substances – chromatography – is taught in secondary school. A questionnaire-based study with teachers (N=76) was used to get a first glance at the situation in schools. The results show that various chromatographic techniques (PC, TLC, GC, HPLC) are taught in secondary school using different context settings. All teachers use paperchromatography as a students‘ experiment analyzing e.g. colour pens in 7th grade. A far less amount of teachers cover more complex techniques such as gas chromatography e.g. in 12th grade. A detailed insight was attained by analyzing 37 chemistry lessons of 18 classes in 7th grade. It could be shown that a broad variety of experiments, remarkable differences in the use of scientific concepts to explain how chromatography works and in the application of media occure.