Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/153426
Title: A direct injection liquid chromatography tandem mass spectrometry method for the kinetic study on iodinated contrast media (ICMs) removal in natural water
Authors: Lopez-Prieto, Israel J.
Wu, Shimin
Ji, Weikang
Daniels, Kevin D.
Snyder, Shane Allen
Keywords: Engineering::Environmental engineering::Water treatment
Issue Date: 2020
Source: Lopez-Prieto, I. J., Wu, S., Ji, W., Daniels, K. D. & Snyder, S. A. (2020). A direct injection liquid chromatography tandem mass spectrometry method for the kinetic study on iodinated contrast media (ICMs) removal in natural water. Chemosphere, 243, 125311-. https://dx.doi.org/10.1016/j.chemosphere.2019.125311
Journal: Chemosphere 
Abstract: Iodinated contrast media (ICMs) are a class of X-ray contrast media worldwide utilized for radiographic procedures. Since they cannot be removed efficiently during water treatment, they can be found in surface and groundwater. In this work, a rapid and sensitive direct injection liquid chromatography-tandem (LC-MS/MS) method for the simultaneous analysis of seven ICMs media (iopamidol, ioxitalamic acid, diatrizoic acid, iothalamic acid, iohexol, iomeprol and iopromide) in complex aqueous matrices has been developed and validated. The MDLs for the analytes ranged from 0.7 to 21 ng L-1 in ultrapure water, and recoveries ranged from 86 to 100% in drinking water, 85-103% in groundwater and 84-105% in WWTP effluent. A stereo-isomer for iopromide was separated. This analytic method was applied to investigate the removal of target ICMs by low pressure ultra violet light (LPUV) advanced oxidation processes with three oxidants, hydrogen peroxide, free chlorine and monochloramine in groundwater. Results showed that the addition of oxidants did not enhance attenuation of ICMs, since fluence-based decay apparent rate constants were similar (KUV = 3.2 × 10-3, KUV-Cl2 = 3.6 × 10-3 and KUV-NH2 = 3.4 × 10-3 10-3 cm2 mJ-1). This yielded direct photolysis is the main mechanism to attenuate target ICMs.
URI: https://hdl.handle.net/10356/153426
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2019.125311
Rights: © 2019 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20220407
Fulltext Availability: With Fulltext
Appears in Collections:NEWRI Journal Articles

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