TY - JOUR
T1 - Detection and Quantification of Hydrogen Peroxide in Aqueous Solutions Using Chemical Exchange Saturation Transfer
AU - Ryoo, David
AU - Xu, Xiang
AU - Li, Yuguo
AU - Tang, Joel A.
AU - Zhang, Jia
AU - Van Zijl, Peter C.M.
AU - Liu, Guanshu
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/7/18
Y1 - 2017/7/18
N2 - The development of new analytical methods to accurately quantify hydrogen peroxide is of great interest. In the current study, we developed a new magnetic resonance (MR) method for noninvasively quantifying hydrogen peroxide (H2O2) in aqueous solutions based on chemical exchange saturation transfer (CEST), an emerging MRI contrast mechanism. Our method can detect H2O2 by its specific CEST signal at ∼6.2 ppm downfield from water resonance, with more than 1000 times signal amplification compared to the direct NMR detection. To improve the accuracy of quantification, we comprehensively investigated the effects of sample properties on CEST detection, including pH, temperature, and relaxation times. To accelerate the NMR measurement, we implemented an ultrafast Z-spectroscopic (UFZ) CEST method to boost the acquisition speed to 2 s per CEST spectrum. To accurately quantify H2O2 in unknown samples, we also implemented a standard addition method, which eliminated the need for predetermined calibration curves. Our results clearly demonstrate that the presented CEST-based technique is a simple, noninvasive, quick, and accurate method for quantifying H2O2 in aqueous solutions.
AB - The development of new analytical methods to accurately quantify hydrogen peroxide is of great interest. In the current study, we developed a new magnetic resonance (MR) method for noninvasively quantifying hydrogen peroxide (H2O2) in aqueous solutions based on chemical exchange saturation transfer (CEST), an emerging MRI contrast mechanism. Our method can detect H2O2 by its specific CEST signal at ∼6.2 ppm downfield from water resonance, with more than 1000 times signal amplification compared to the direct NMR detection. To improve the accuracy of quantification, we comprehensively investigated the effects of sample properties on CEST detection, including pH, temperature, and relaxation times. To accelerate the NMR measurement, we implemented an ultrafast Z-spectroscopic (UFZ) CEST method to boost the acquisition speed to 2 s per CEST spectrum. To accurately quantify H2O2 in unknown samples, we also implemented a standard addition method, which eliminated the need for predetermined calibration curves. Our results clearly demonstrate that the presented CEST-based technique is a simple, noninvasive, quick, and accurate method for quantifying H2O2 in aqueous solutions.
UR - http://www.scopus.com/inward/record.url?scp=85025165515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85025165515&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.7b01763
DO - 10.1021/acs.analchem.7b01763
M3 - Article
C2 - 28627877
AN - SCOPUS:85025165515
SN - 0003-2700
VL - 89
SP - 7758
EP - 7764
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 14
ER -