Title
A Pure Shift-Based NMR Method for Transverse Relaxation Measurements on Complex Samples
Abstract
Transverse spin–spin ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$T_{2}$ </tex-math></inline-formula> ) relaxation provides a significant insight into molecular dynamics and interactions, and the determination of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$T_{2}$ </tex-math></inline-formula> relaxation times constitutes an important evaluation metric in nuclear magnetic resonance (NMR) applications. However, two major limitations of spectral congestion and high radio frequency power deposition are generally encountered in conventional Carr–Purcell–Meiboom–Gill-based experiments, thus hindering accurate <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$T_{2}$ </tex-math></inline-formula> relaxation measurements. Herein, we present an NMR method based on pure shift techniques to avoid these two limitations and achieve <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$T_{2}$ </tex-math></inline-formula> relaxation measurements on complex samples that contain crowded NMR resonances. We perform detailed theoretical analyses for the proposed method to explicitly understand its basic mechanism. Experiments on a simple chemical solution, a complex sample of estradiol, and a medicine sample of azithromycin are carried out to illustrate feasibility and applicability of the proposed method. Both theoretical analyses and experimental results show the ability of the proposed method for <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$T_{2}$ </tex-math></inline-formula> relaxation measurements on complex samples and its potential for practical applications.
Year
DOI
Venue
2020
10.1109/TIM.2019.2894047
IEEE Transactions on Instrumentation and Measurement
Keywords
Field
DocType
Nuclear magnetic resonance,Radio frequency,Coherence,Magnetic resonance imaging,Power measurement,Frequency measurement,Chemicals
Transverse plane,Electronic engineering,Condensed matter physics,Mathematics
Journal
Volume
Issue
ISSN
69
1
0018-9456
Citations 
PageRank 
References 
0
0.34
0
Authors
7
Name
Order
Citations
PageRank
Yuqing Huang1163.12
Haolin Zhan200.34
Xueqiu You300.68
Yang Yu4393.92
Chen Li500.34
Shuhui Cai6146.10
Zhong Chen722521.56