Low Field NMR Transverse Relaxation Spectrum of Peanut

LI Chaorui; LIU Qing; YANG Peiqiang

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Low Field NMR Transverse Relaxation Spectrum of Peanut

更新时间：2023-12-11

- Low Field NMR Transverse Relaxation Spectrum of Peanut
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 53, Issue 2, Pages: 1-5(2014)
- 作者机构：
  
  1. 中山大学物理科学与工程技术学院,广东,广州,510275
  2. 
  3. 广东检验检疫技术中心食品实验室,广东,广州,510623
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014，
  
  Published Online：25 March 2014，
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LI Chaorui, LIU Qing, YANG Peiqiang. Low Field NMR Transverse Relaxation Spectrum of Peanut. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 53(2):1-5(2014)
DOI：

LI Chaorui, LIU Qing, YANG Peiqiang. Low Field NMR Transverse Relaxation Spectrum of Peanut. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 53(2):1-5(2014) DOI：

摘要

尽管低场

H-核磁共振（NMR）弛豫谱技术可以有效地获取油料作物种子中水和油脂等组分含量信息，但实现准确分析的关键前提是解决弛豫谱的标识问题。首先，通过记录鲜花生脱水过程质量随时间变化确定核磁共振测量步骤；随之，采用CPMG（Carr-Purcell-Meiboom-Gill）方法获得花生核磁共振横向弛豫数据；最后，使用连续谱迭代方法得到花生核磁共振弛豫谱。由弛豫谱峰面积与花生质量变化关系，并借助纯花生油实验结果确认了样品脂肪的核磁共振横向弛豫谱。基于单位质量干燥花生和纯花生油两者的脂肪弛豫谱峰面积之比获得与索氏抽提法相吻合的含油率。

Abstract

As low field

H NMR relaxation can effectively measure moisture and fat in oil seed

the key problem is technology for identification of the contribution from these components respectively. The peanut mass change with hydrogenation is recorded for optimizing NMR measurement process. The CPMG(Carr-Purcell-Meiboom-Gill）technique was applied to obtain the NMR transverse relaxation of peanut and peanut oil samples

and the resonance relaxation spectrum was analyzed with the method of continuous spectrum iteration. According to the variation of relaxation spectrum peak area with peanut mass

the assignments of the relaxation peaks were determined with the results from peanut oil. The study found that the transverse relaxation spectrum peaks reflected the fat content in dry peanut. Compared with fat content measured with traditional technology

the peak areas for dry fresh peanut had a positive linear correlation with its fat concentration. The results demonstrate that the NMR transverse relaxation spectrum can be used for determination of fat content in fresh peanut.

关键词

核磁共振横向弛豫脂肪花生

Keywords

nuclear magnetic resonancetransverse relaxation spectrumfatpeanut

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Related Institution

School of Physics & Engineering, Sun Yatsen University

College of Food Science, South China Agricultural University

Food Testing Laboratory, Guangdong Inspection and Quarantine Technology Center

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