A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory

Shu Hsien Liao; Ming Jye Chen; Hong Chang Yang; Shin Yi Lee; Hsin Hsien Chen; Herng Er Horng; Shieh Yueh Yang

doi:10.1063/1.3498895

A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory

Shu Hsien Liao, Ming Jye Chen, Hong Chang Yang^*, Shin Yi Lee, Hsin Hsien Chen, Herng Er Horng, Shieh Yueh Yang

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

In this paper, an instrumentation of the Earth's field nuclear magnetic resonance (EFNMR) inside a laboratory is presented. A lock-in analysis (LIA) technique was proposed to enhance the signal-to-noise ratio (SNR). A SNR of 137.8 was achieved in a single measurement for 9 ml tap water, and the LIA technique significantly enhanced the SNR to 188 after a 10-average in a noisy laboratory environment. The proton-phosphorus coupling in trimethyl phosphate ((CH₃O)₃PO) with J-coupling J [H,F] = (10.99±0.013) Hz has been demonstrated. The LIA technique improves the SNR, and a 2.6-fold improvement in SNR over that of the frequency-adjusted averaging is achieved. To reduce the noise in EFNMR, it was suggested that the LIA technique and the first order gradient shim be used to achieve a subhertz linewidth.

Original language	English
Article number	104104
Journal	Review of Scientific Instruments
Volume	81
Issue number	10
DOIs	https://doi.org/10.1063/1.3498895
Publication status	Published - 2010 Oct

ASJC Scopus subject areas

Instrumentation

Access to Document

10.1063/1.3498895

Cite this

@article{9453aedf3ab842959ed4859070db40c1,

title = "A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory",

abstract = "In this paper, an instrumentation of the Earth's field nuclear magnetic resonance (EFNMR) inside a laboratory is presented. A lock-in analysis (LIA) technique was proposed to enhance the signal-to-noise ratio (SNR). A SNR of 137.8 was achieved in a single measurement for 9 ml tap water, and the LIA technique significantly enhanced the SNR to 188 after a 10-average in a noisy laboratory environment. The proton-phosphorus coupling in trimethyl phosphate ((CH3O)3PO) with J-coupling J [H,F] = (10.99±0.013) Hz has been demonstrated. The LIA technique improves the SNR, and a 2.6-fold improvement in SNR over that of the frequency-adjusted averaging is achieved. To reduce the noise in EFNMR, it was suggested that the LIA technique and the first order gradient shim be used to achieve a subhertz linewidth.",

author = "Liao, {Shu Hsien} and Chen, {Ming Jye} and Yang, {Hong Chang} and Lee, {Shin Yi} and Chen, {Hsin Hsien} and Horng, {Herng Er} and Yang, {Shieh Yueh}",

note = "Funding Information: This work was supported by the National Science Council of Taiwan under Grant No. NSC98-2752-M-002-003-PAE.",

year = "2010",

month = oct,

doi = "10.1063/1.3498895",

language = "English",

volume = "81",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics Publising LLC",

number = "10",

}

TY - JOUR

T1 - A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory

AU - Liao, Shu Hsien

AU - Chen, Ming Jye

AU - Yang, Hong Chang

AU - Lee, Shin Yi

AU - Chen, Hsin Hsien

AU - Horng, Herng Er

AU - Yang, Shieh Yueh

N1 - Funding Information: This work was supported by the National Science Council of Taiwan under Grant No. NSC98-2752-M-002-003-PAE.

PY - 2010/10

Y1 - 2010/10

N2 - In this paper, an instrumentation of the Earth's field nuclear magnetic resonance (EFNMR) inside a laboratory is presented. A lock-in analysis (LIA) technique was proposed to enhance the signal-to-noise ratio (SNR). A SNR of 137.8 was achieved in a single measurement for 9 ml tap water, and the LIA technique significantly enhanced the SNR to 188 after a 10-average in a noisy laboratory environment. The proton-phosphorus coupling in trimethyl phosphate ((CH3O)3PO) with J-coupling J [H,F] = (10.99±0.013) Hz has been demonstrated. The LIA technique improves the SNR, and a 2.6-fold improvement in SNR over that of the frequency-adjusted averaging is achieved. To reduce the noise in EFNMR, it was suggested that the LIA technique and the first order gradient shim be used to achieve a subhertz linewidth.

AB - In this paper, an instrumentation of the Earth's field nuclear magnetic resonance (EFNMR) inside a laboratory is presented. A lock-in analysis (LIA) technique was proposed to enhance the signal-to-noise ratio (SNR). A SNR of 137.8 was achieved in a single measurement for 9 ml tap water, and the LIA technique significantly enhanced the SNR to 188 after a 10-average in a noisy laboratory environment. The proton-phosphorus coupling in trimethyl phosphate ((CH3O)3PO) with J-coupling J [H,F] = (10.99±0.013) Hz has been demonstrated. The LIA technique improves the SNR, and a 2.6-fold improvement in SNR over that of the frequency-adjusted averaging is achieved. To reduce the noise in EFNMR, it was suggested that the LIA technique and the first order gradient shim be used to achieve a subhertz linewidth.

UR - http://www.scopus.com/inward/record.url?scp=78149442649&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78149442649&partnerID=8YFLogxK

U2 - 10.1063/1.3498895

DO - 10.1063/1.3498895

M3 - Article

C2 - 21034103

AN - SCOPUS:78149442649

SN - 0034-6748

VL - 81

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 10

M1 - 104104

ER -

A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this