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引用本文:   成实, 王欣, 刘宝林. 碳链长度及不饱合度对脂肪酸低场核磁弛豫特性的影响. 分析化学, 2018, 46(2): 281-287. doi:  10.11895/j.issn.0253-3820.171056 [复制]

Citation:   CHENG Shi, WANG Xin, LIU Bao-Lin. Low-field Nuclear Magnetic Resonance Relaxation Characteristics of Fatty Acids with Different Chain Lengths and Degree of Unsaturation. Chinese Journal of Analytical Chemistry, 2018, 46(2): 281-287. doi: 10.11895/j.issn.0253-3820.171056 [复制]

碳链长度及不饱合度对脂肪酸低场核磁弛豫特性的影响

通讯作者:  王欣, 18918629281@126.com

收稿日期: 2017-07-01

接受日期: 2017-11-28

出版日期: 2018-02-01

基金项目: 本文系国家自然科学基金项目(No.31201365)资助

Low-field Nuclear Magnetic Resonance Relaxation Characteristics of Fatty Acids with Different Chain Lengths and Degree of Unsaturation

Corresponding author:  WANG Xin, 18918629281@126.com

Received Date:  2017-07-01

Accepted Date:  2017-11-28

Published Date:  2018-02-01

Fund Project:  This work was supported by the National Natural Science Foundation of China (No. 31201365)

对不同碳链长度及饱和程度的脂肪酸及二、三元混合脂肪酸体系的低场核磁共振弛豫特性进行了研究。结果表明,除乙酸外,随碳链长度增加,横向弛豫时间(T2)及单组分弛豫时间(T2W)均减小;而随不饱和度增加,二者均相对增大。对棕榈酸-油酸、硬脂酸-油酸混合体系而言,随着油酸比例增加,T2T2W均增大;油酸比例大于40%后,会对亚油酸-油酸体系的弛豫响应产生较大影响。随着亚油酸比例增加,各亚油酸-油酸-硬脂酸三元混合体系的T2弛豫时间均增大,峰面积比例(S21)减小,而峰面积比例(S22)增大,油酸比例越高,峰面积比例的变化幅度减小,T2W均增加,且随体系中油酸(OA)比例的增加变化趋缓。

关键词:   脂肪酸, 链长, 不饱和度, 低场核磁共振, 弛豫特性
Key words:   Fatty acid, Chain length, Degree of unsaturation, Low-field nuclear magnetic resonance, Relaxation characteristics
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碳链长度及不饱合度对脂肪酸低场核磁弛豫特性的影响

成实, 王欣, 刘宝林

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