Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/180353
Title: Rapid direct injection LC-MS/MS method for analysis of prioritized indicator compounds in wastewater effluent
Authors: Anumol, T
Wu, S
Marques Dos Santos, M
Daniels, K.D
Snyder, S.A 
Issue Date: 2015
Citation: Anumol, T, Wu, S, Marques Dos Santos, M, Daniels, K.D, Snyder, S.A (2015). Rapid direct injection LC-MS/MS method for analysis of prioritized indicator compounds in wastewater effluent. Environmental Science: Water Research and Technology 1 (5) : 632-643. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Trace organic compounds (TOrCs) have been detected in drinking water sources for several years, raising concerns due to their potential risks to public health. The main contributor of TOrCs to drinking water is through wastewater discharges. However, there are several hundred TOrCs currently known with numerous new organic chemicals being released daily, making it unfeasible to monitor each one in water. This study used a detailed literature review and scoring system to establish a list of twenty priority indicator TOrCs in US wastewaters. Next, a rapid direct injection LC-MS/MS method for analysis of these compounds was developed without the need for an extraction step and only 80 ?L sample volume while providing method reporting limits of 3-39 ng L -1 for all but one TOrC (sucralose: 302 ng L -1 ). The elimination of an extraction step reduced matrix effects considerably making the method suitable for wastewater analysis. Method validation including matrix spike recoveries, linearity of calibration curve and inter- and intra-day variability was successfully performed. Finally, the twenty indicator TOrCs were evaluated in four different wastewater treatment plant (WWTP) effluents through four sample campaigns spread across a year. The occurrence data indicated that all indicator TOrCs were detected in at least three out of the four WWTP effluents. Sucralose, iohexol, TCPP, acesulfame and gemfibrozil were detected in all samples at the four WWTPs indicating they could be used as indicators of wastewater influence in receiving waters. DEET, caffeine, triclosan, iopromide and others are effective indicators at showing seasonal variations, treatment process efficacy, and consumption patterns. Overall, the impact of this study will help develop more effective monitoring programs for TOrCs in water reuse schemes. © 2016 The Royal Society of Chemistry.
Source Title: Environmental Science: Water Research and Technology
URI: https://scholarbank.nus.edu.sg/handle/10635/180353
ISSN: 20531400
Rights: Attribution 4.0 International
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