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Determination of trace ethylene glycol in industrial solvents and lubricants using phenyl boronic acid derivatization and multidimensional gas chromatography

Citation

Luong, J and Gras, R and Cortes, HJ and Shellie, RA, Determination of trace ethylene glycol in industrial solvents and lubricants using phenyl boronic acid derivatization and multidimensional gas chromatography, Analytica Chimica Acta, 805 pp. 101-106. ISSN 0003-2670 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier B.V

DOI: doi:10.1016/j.aca.2013.10.024

Abstract

A practical gas chromatographic approach is introduced for the characterization of trace ethylene glycol in industrial solvents and lubricants. The analytical approach employs single step derivatization technique that effectively converts ethylene glycol to the cyclic boronate ester (2-phenyl-1,3,2-dioxaborolane), using phenyl boronic acid as a derivatizing reagent. The separation of the derivatized product was achieved by using multidimensional gas chromatography. Heavy lubricant matrices like engine crankcase oil were back-flushed to improve sample throughput and system cleanliness. Detection and quantitation of 2-phenyl-1,3,2-dioxaborolane was conducted with mass spectrometry in selected ion monitoring mode.
   Complete analysis is conducted in less than 10 min. Reproducibility of retention time was found to be less than 0.05% (n = 20). Quantitative performance is highly satisfactory, viz. 0.49 ± 0.02 mg kg-1 (n = 12) and 25.5 ± 0.48 mg kg-1 (n = 12) for 0.5 mg kg-1 and 25 mg kg-1 spiked concentrations respectively. Over a range from 100 µg kg-1 to 100 mg kg-1, the response for 2-phenyl-1,3,2-dioxaborolane is linear with correlation coefficient of 0.998, a practical detection limit of 50 μg kg-1, and average spiked recoveries for the analyte in the matrices tested range from 93 to 99%.
   Propylene glycol can also be analyzed using the same approach and water does not inhibit the formation of the derivatives, most probably owing to the use of 2,2-dimethoxypropane as a solvent for the derivatizing agent.

Item Details

Item Type:Refereed Article
Keywords:multidimensional gas chromatography, planar microfluidic device, monoethylene glycol, phenyl boronic acid, ethylene glycolphenyl boronate, 2-phenyl-1,3,2-dioxaborolane
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Luong, J (Mr Jim Luong)
Author:Cortes, HJ (Dr Hernan Cortes)
Author:Shellie, RA (Associate Professor Robert Shellie)
ID Code:87726
Year Published:2013
Web of Science® Times Cited:8
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2013-12-04
Last Modified:2014-05-08
Downloads:0

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