茶叶中含Fe量检测的实验教学改革探索

Experimental teaching innovate exploring of quantitative detection about Fe content in the tea

以茶叶中微量元素含Fe量的定量检测为实例,进行实验教学改革,采用“单个必做”和“组队选做”相结合模式,结合已知和未知的实验因素分析,以提高学生的创新和实践能力.分析学生在不同模式的实验完成情况,统计比较改革前后学生的实验成绩,并进行实验满意度调查.结果表明:所有学生完成了单个必做实验,98.0%的学生完成了组队选做实验,60.0%的学生完成了其他因素分析实验;与改革前相比,改革后学生的总成绩提高了22分,学生的及格率和满意度分别达97.5%和95.0%,增幅分别达25.0%和20.6%.通过实验教学的革新,让冗长较难的实验变得通俗且易操作,调动了学生的兴趣爱好,培养了团队协作能力,实验效果好.这些创新可以更好地让学生掌握现代分析技术的原理和方法,夯实基础实验技能,提高综合实验设计和动手能力,提升学生满意度.

Based on the quantitative detection of Fe in the tea,an innovate experimental teaching is executed.The students innovate ability and practice performance can be developped by analysis of known and unknown experimental factors which is executed combine novel mode of"finish by oneself"and"selectivity finish by group".The experiment completion extent is analyzed in the different parts,the students’experimental results are compared in detail before and after the teaching reform,and the satisfaction of this experiment was investigated.The results show:all the students finished the single must done experimental part,98.0%of the students have completed the team selected experimental part,and 60.0%of the students have completed the other factor analysis experiment.Compared with before the teaching reform,the total score of the students has increased by 22 points,the passing rate and satisfaction rate of the students was 97.5%and 95.0%,and the increase rate was 25.0%and20.6%respectively after the teaching reform.Based on this experimental teaching innovation result,the long and difficult experiments have become demotic and easy to control,students’interests and hobbies are mobilized effectively,the ability of team cooperation is cultivated well,and the experimental effect is very good.These innovations can enable students to master the principles and methods of modern analytical technology better,consolidate the basic experimental skills,improve the comprehensive experimental design and hands-on ability,and improve students’satisfaction.