碘量法测定坚果油的碘值——推荐一个分析化学综合实验

doi:10.3866/PKU.DXHX201912028

Abstract

Abstract:

A comprehensive analytical chemistry experiment was introduced: oil in nuts like walnuts and peanuts was extracted by organic solvent and the iodine value of these oil was standardized via indirect iodometry to evaluate the degree of unsaturation of nut oil. By using purification techniques like extraction, filtration and distillation, as well as typical titrimetry like iodimetric method, students can interpret the experimental principles with their basic theoretical knowledge. Furthermore, life-based problem solving enhances their ability to solve problems and arouses their interest in chemistry.

Key words: Nut oil, Iodimetric method, Iodine value, Analytical chemistry experiment

Yan Deng. Iodometry-Based Standardization of Iodine Value of Nut Oil: An Introduction of a Comprehensive Analytical Chemistry Experiment[J].University Chemistry, 2021, 36(2): 1912028.

Figures/Tables 2

References 10

1	张永刚; 印遇龙; 黄瑞林; 李铁军; 钟华宜. 食品科学, 2006, (1), 273.
2	中华人民共和国国家质量监督检验检疫总局. GB/T 22223-2008, 北京: 中国标准出版社, 2008.
3	Hori K. ; Koriyama N. ; Omori H. ; Kuriyama M. ; Arishima T. ; Tsumura K. Lwt-Food Sci. Technol. 2012, 48 (2), 204. doi: 10.1016/j.lwt.2012.03.014
4	胡珺; 魏芳; 董绪燕; 吕昕; 李光明; 陈洪. 分析测试学报, 2012, 31 (6), 749. doi: 10.3969/j.issn.1004-4957.2012.06.023
5	陶健; 蒋炜离; 丁太春; 冯波; 靳立新; 程海芳. 中国食品学报, 2011, 11 (8), 154.
6	陆啸天.甲基戊烷浸出膨化大豆料的研究与应用(硕士学位论文).无锡: 江南大学, 2017.
7	Barison A. ; Pereira da Silva C. W. ; Campos F. R. ; Simonelli F. ; Lenz C. A. ; Ferreira A. G. Magn. Reson. Chem. 2010, 48 (8), 642.
8	于修烛; 杜双奎; 岳田利; 王青林. 农业机械学报, 2009, 40 (1), 114.
9	中华人民共和国国家质量监督检验检疫总局. GB/T 5532-2008, 北京: 中国标准出版社, 2008.
10	李克安. 分析化学教程, 北京: 北京大学出版社, 2005.

m(K₂Cr₂O₇)/g	V(Na₂S₂O₃)/mL	c(Na₂S₂O₃)/(mol·L^-1)	${\bar c}$(Na₂S₂O₃)/(mol·L^-1)	RSD/%
0.1304	27.71	0.0960	0.0954	0.57
0.1129	24.25	0.0949
0.1258	26.96	0.0952

油脂来源	出油率/%	油脂质量m/g	V₁/mL	碘值I·V	I·V平均值	RSD/%
花生	41.0	0.1959	27.37	82.25	80.74	2.40
		0.2214	25.79	81.42
		0.2133	26.84	78.55
核桃	28.9	0.2301	27.05	71.71	74.30	3.32
		0.1923	28.51	76.62
		0.2102	27.73	74.58

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Iodometry-Based Standardization of Iodine Value of Nut Oil: An Introduction of a Comprehensive Analytical Chemistry Experiment

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