Dispersive Liquid-Liquid Microextraction Combined with Ultrahigh Performance Liquid Chromatography/Tandem Mass Spectrometry for Determination of Organophosphate Esters in Aqueous Samples. (29th January 2014)

• Record Type: Journal Article
• Authors: Luo, Haiying; Xian, Yanping; Guo, Xindong; Luo, Donghui; Wu, Yuluan; Lu, Yujing; Yang, Bao
• Other Names: Cheng J. Academic Editor.; Strege M. A. Academic Editor.
• Is Part Of: TheScientificWorldjournal. Volume 2014(2014)
• Publication Date: 2014-01-29
• Subjects: Science -- Periodicals; Technology -- Periodicals; Medicine -- Periodicals; 505
• DOI: 10.1155/2014/162465
• Languages: English
• ISSNs: 2356-6140

Abstract

Abstract : A new technique was established to identify eight organophosphate esters (OPEs) in this work. It utilised dispersive liquid-liquid microextraction in combination with ultrahigh performance liquid chromatography/tandem mass spectrometry. The type and volume of extraction solvents, dispersion agent, and amount of NaCl were optimized. The target analytes were detected in the range of 1.0–200 µ g/L with correlation coefficients ranging from 0.9982 to 0.9998, and the detection limits of the analytes were ranged from 0.02 to 0.07 µ g/L ( S / N = 3 ) . The feasibility of this method was demonstrated by identifying OPEs in aqueous samples that exhibited spiked recoveries, which ranged between 48.7% and 58.3% for triethyl phosphate (TEP) as well as between 85.9% and 113% for the other OPEs. The precision was ranged from 3.2% to 9.3% (n = 6 ), and the interprecision was ranged from 2.6% to 12.3% (n = 5 ). Only 2 of the 12 selected samples were tested to be positive for OPEs, and the total concentrations of OPEs in them were 1.1 and 1.6 µ g/L, respectively. This method was confirmed to be simple, fast, and accurate for identifying OPEs in aqueous samples.