茶叶中咖啡因的提取实验装置的改进与探索

doi:10.3866/PKU.DXHX201807053

University Chemistry ›› 2019, Vol. 34 ›› Issue (3): 42-46.doi: 10.3866/PKU.DXHX201807053

• Chemistry Laboratory • Previous Articles Next Articles

Improvement and Exploration of Experimental Setup for Extraction of Caffeine from Tea

Yunying WU¹,Jianxin XIE¹,Xianxue WU¹,Wenjing CHEN¹,Gaozhang GOU^2,*()

¹ College of Chemistry Biology and Environment, Yuxi Normal University, Yuxi 653100, Yunnan Province, P. R. China
² School of Science, Honghe University, Mengzi 661199, Yunnan Province, P. R. China

Received:2018-07-28 Accepted:2018-09-04 Published:2019-03-09
Contact: Gaozhang GOU E-mail:hhxylxyhxx@126.com
Supported by:
玉溪师范学院教学改革研究与实践项目(201739);红河学院教学建设与改革项目(JJG171009);云南省教育厅科学研究基金项目资助(2018JS421);云南省应用基础研究计划青年项目(2017FD155)

Abstract

Abstract:

The extraction experiment of caffeine from tea was a classic experiment in Organic Chemistry Laboratory. In this paper, the original Soxhlet extractor device used in the experiment was modified and obtained the internal ventilation Soxhlet extractor, which was used in laboratory teaching. The extraction effects of the improved Soxhlet extractor and the original Soxhlet extractor were compared by the control experiment. The results showed that the improved device keeps the function and characteristics of the original devicewith the shorter the extraction time, higher extraction temperature and the extraction rate. Thus, it may provide an alternative for college organic laboratory teaching.

Key words: Caffeine, Organic chemistry laboratory, Soxhlet extractor, Device improvement

Yunying WU,Jianxin XIE,Xianxue WU,Wenjing CHEN,Gaozhang GOU. Improvement and Exploration of Experimental Setup for Extraction of Caffeine from Tea[J].University Chemistry, 2019, 34(3): 42-46.

Figures/Tables 4

References 14

1	关雅琼; 张曜武; 杨浩. 天津化工, 2011, 25 (3), 17. doi: 10.3969/j.issn.1008-1267.2011.03.005
2	胡小铭; 王红明; 江源. 化学教育, 2002, 23 (5), 44. doi: 10.3969/j.issn.1003-3807.2002.05.018
3	张黎明. 大学化学, 2002, 17 (5), 44.
4	杨祖幸; 汤洁; 孙群; 赖春霞; 陈家驹. 实验室研究与探索, 2008, 27 (3), 43. doi: 10.3969/j.issn.1006-7167.2008.03.015
5	Adam D. J. ; Mainwaring J. ; Quigley M. N. J. Chem. Educ. 1996, 73 (12), 1171. doi: 10.1021/ed073p1171
6	Netz D. F. J. Chem. Educ. 1993, 70 (7), 598. doi: 10.1021/ed070p598
7	潘玉珍; 蔡靖雯; 曾敏; 范文杰; 谭大志. 化学教育, 2015, 36 (8), 28.
8	王莉贤; 王红; 金东元; 高永红. 实验室研究与探索, 2004, 23 (9), 32. doi: 10.3969/j.issn.1006-7167.2004.09.011
9	吕守茂; 祝巨; 俞远志; 章小峰. 实验室研究与探索, 2009, 28 (5), 32. doi: 10.3969/j.issn.1006-7167.2009.05.012
10	曾艳萍; 黄齐林. 大学化学, 2018, 33 (1), 54.
11	谢巧玲. 邯郸学院学报, 2001, 11 (3), 41. doi: 10.3969/j.issn.1673-2030.2001.03.012
12	汪志勇; 查正根; 郑小琦. 实用有机化学实验高级教程, 北京: 高等教育出版社, 2016.
13	曾和平.有机化学实验.高等教育出版社, 2014.
14	刘卫; 苟高章. 综合化学实验1, 成都: 西南交通大学出版社, 2016.

	平行次数	提取时间/h	首次虹吸用时/min	总虹吸次数/次	虹吸一次平均用时/min	提取筒上部温度/℃	提取筒中部温度/℃	提取筒下部温度/℃	咖啡因质量/g	提取率/%	平均提取率/%
原索氏提取器	1	1	20	7	8.6	60	58	61	0.0583	0.583	0.5817
	2	1	19	8	7.5	61	58	61	0.0575	0.575
	3	1	18	8	7.5	60	59	60	0.0587	0.587
改进索氏提取器	1	1	15	9	6.7	67	67	68	0.0646	0.646	0.6497
	2	1	15	10	6.0	67	68	68	0.0649	0.649
	3	1	14	10	6.0	68	68	68	0.0654	0.654

	提取时间/h	虹吸次数/次	咖啡因质量/g	提取率/%
原索氏提取器	0.5	2	0.0254	0.254
	1	8	0.0575	0.575
	1.5	10	0.0587	0.587
	2	15	0.0605	0.605
改进索氏提取器	0.25	1	0.0474	0.474
	0.5	7	0.0621	0.621
	1	10	0.0649	0.649
	1.5	15	0.0663	0.663
	2	19	0.0670	0.670

[1]	Yun Hong, Shengxiang Yang, Hongtao Zhang. Ideological and Political Education Practice of the Organic Chemistry Laboratory in A & F Universities [J]. University Chemistry, 2022, 37(8): 2108070-.
[2]	Fang Fang, Yuena Yu, Chunyan Wang, Huawei Liu. Exploration and Practice on Teaching Reform of Organic Chemistry Laboratory [J]. University Chemistry, 2022, 37(7): 2111008-.
[3]	Xiaochuan Zou, Yuqiu Wang, Qinqin Dai, Di Zhang, Yihua Li, Guifeng Wang, Yuan Tang, Cun Wang, Kaiyun Shi. Overview and Practice of Evaluation Methods of Organic Chemistry Laboratory in Local Universities [J]. University Chemistry, 2022, 37(4): 202111048-.
[4]	Yi Ma, Lingling Wei, Shuni Li, Dongxu Xue, Ling Xu, Weiqiang Zhang, Huan Jiao. Promoting the Reform and Practice of Inorganic Chemistry Laboratory Course in Multi-Dimensions for First-Class Course [J]. University Chemistry, 2022, 37(3): 2106044-.
[5]	Wei Wang, Baohan Zhou, Dan Sun, Jiaqiang Ren. Cocktail Experiment: Exploring of Aesthetic Education Playing a Transfer Role in Inorganic Elemental Chemistry Laboratory [J]. University Chemistry, 2022, 37(2): 2106009-.
[6]	Lijuan Qiu, Xiaoxiao Xing. Exploration and Practice of Reasonable Allocation of Inorganic Chemistry Laboratory Resources in Universities [J]. University Chemistry, 2022, 37(2): 2109102-.
[7]	Yinfeng Wang, Jiangen Huang, Zhigang Luo, Huixian Ye, Jia Li. Research and Practical Incorporation of Course Ideology and Politics in Inorganic Chemistry Laboratory under the OBE Concept [J]. University Chemistry, 2022, 37(11): 2201057-0.
[8]	Liping Wang, Yanli Liu, Xiaoli Zhou, Xiaojing Li, Huanfeng Wang, Yuling Li. Test to Promote Practice with Flipped Classroom: A Case Study of the First Experiment of Inorganic Chemistry Laboratory Teaching [J]. University Chemistry, 2022, 37(11): 2201034-0.
[9]	Yifan Xie, Liyun Yao, Zhonghong Yan, Yuxing Cai, Yujie Jin, Ning Li. Design of Experiment for Determination of Caffeine Content by Ultra Performance Convergence Chromatography [J]. University Chemistry, 2021, 36(9): 2011055-.
[10]	Changyan Sun, Wenjun Li, Liying Lu, Bin Dong, Hualei Zhou. Practice and Thinking of Online Teaching on Inorganic Chemistry Laboratory Course [J]. University Chemistry, 2021, 36(7): 2008047-.
[11]	Dexin Tan, Jiayi Liang, Mingyue Ning, Yanli Wang. Teaching and Learning of Organic Chemistry Laboratory Course under "PBL" Model [J]. University Chemistry, 2021, 36(7): 2010026-.
[12]	Weiguang Zhao, Ying Guan. Teaching of Organic Chemistry Laboratory for Improvement of Scientific Literacy Ⅱ: "Thought Experiment" and the Cultivation of Basic Research Ability [J]. University Chemistry, 2021, 36(4): 2005076-.
[13]	Ling Xu, Hengwei Wei, Lingling Wei, Yi Ma, Xiaoming Wang, Huan Jiao. Exploration and Practice of Course Ideology and Politics Education in Basic Inorganic Chemistry Laboratory: Taking Preparation of Graphene Oxide as an Example [J]. University Chemistry, 2021, 36(3): 1912042-.
[14]	Yurong Zhang, Yaofeng Yuan. Elements of Ideology and Politics Education in the Courses of Inorganic Chemistry and Inorganic Chemistry Laboratory [J]. University Chemistry, 2021, 36(3): 2007057-.
[15]	Wenxue Chen, Shasha Liu, Huixiang Li. Improvement of the Determination of Components in Paracetamol, Aminophenazone, Caffeine and Chlorpheniramine Maleate Tablet Using ¹H Nuclear Magnetic Resonance Spectroscopy [J]. University Chemistry, 2021, 36(2): 2002045-.

Improvement and Exploration of Experimental Setup for Extraction of Caffeine from Tea

RichHTML

PDF

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 4

References 14

Related Articles 15

Metrics

Recommended 0