TY - JOUR
T1 - Fast and Quantitative NMR Metabolite Analysis Afforded by a Paramagnetic Co-Solute
AU - Mulder, Frans A.A.
AU - Tenori, Leonardo
AU - Luchinat, Claudio
PY - 2019
Y1 - 2019
N2 - NMR spectroscopy is an indispensable technique for the determination of the chemical identity and structure of small molecules. The method is especially recognized for its robustness and intrinsically quantitative nature, and has manifested itself as a key analytical platform for diverse fields of application, ranging from chemical synthesis to metabolomics. Unfortunately, the slow recovery of nuclear spin polarization by spin-lattice (T1) relaxation causes most experimental time to be lost on idle waiting. Furthermore, truly quantitative NMR (qNMR) spectroscopy requires waiting times of 5-times the longest T1 in the sample, making qNMR spectroscopy slow and inefficient. We demonstrate here that co-solute paramagnetic relaxation can mitigate these two problems simultaneously. The addition of a small amount of paramagnetic gadolinium chelate, available in the form of commercial contrast-agent solutions, enables cheap, quantitative, and efficient high-throughput mixture analysis.
AB - NMR spectroscopy is an indispensable technique for the determination of the chemical identity and structure of small molecules. The method is especially recognized for its robustness and intrinsically quantitative nature, and has manifested itself as a key analytical platform for diverse fields of application, ranging from chemical synthesis to metabolomics. Unfortunately, the slow recovery of nuclear spin polarization by spin-lattice (T1) relaxation causes most experimental time to be lost on idle waiting. Furthermore, truly quantitative NMR (qNMR) spectroscopy requires waiting times of 5-times the longest T1 in the sample, making qNMR spectroscopy slow and inefficient. We demonstrate here that co-solute paramagnetic relaxation can mitigate these two problems simultaneously. The addition of a small amount of paramagnetic gadolinium chelate, available in the form of commercial contrast-agent solutions, enables cheap, quantitative, and efficient high-throughput mixture analysis.
KW - analytical chemistry
KW - co-solute paramagnetic relaxation enhancement
KW - gadolinium chelate
KW - metabolomics
KW - NMR spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85072210924&partnerID=8YFLogxK
U2 - 10.1002/anie.201908006
DO - 10.1002/anie.201908006
M3 - Journal article
C2 - 31398278
AN - SCOPUS:85072210924
SN - 1433-7851
VL - 58
SP - 15283
EP - 15286
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 43
ER -