Agricultural and Biosystems Engineering Publications

Campus Units

Agricultural and Biosystems Engineering, Civil, Construction and Environmental Engineering, Food Science and Human Nutrition, Toxicology

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

8-2017

Journal or Book Title

Chromatographia

Volume

80

Issue

8

First Page

1249

Last Page

1256

Research Focus Area(s)

Biological and Process Engineering and Technology

DOI

10.1007/s10337-017-3340-0

Abstract

There is a great demand for simple, fast and accurate methods for quantification of volatile organic contaminants in soil samples. Solid-phase microextraction (SPME) has a huge potential for this purpose, but its application is limited by insufficient accuracy caused by a matrix effect. The aim of this research was to develop the method for BTEX quantification in soil using combined standard addition (SA) and internal standard (IS) calibration. Deuterated benzene (benzene-d6) was used as the internal standard for all analytes. The optimized method includes spiking replicate samples with different concentrations of BTEX standards and the same concentration of benzene-d6, equilibration of soil samples at 40 °C during 2 h, and SPME–GC–MS analysis. Precision and accuracy of IS and SA methods were compared on different soil matrices. Combined SA + IS method provided more precise calibration plots compared to the conventional SA calibration. The SA + IS calibration provided more precise and accurate results compared with a reference method based on solvent extraction followed by GC–MS when applied to BTEX quantification in real soil samples (spiked with diesel fuel and aged). Recoveries of BTEX from soil samples spiked with known concentrations of analytes using the developed method were in the range of 73–130% with RSD values less than 15% for all BTEX. The proposed simultaneous standard addition and internal standard approach can be advantageous and adopted for improved quantification of other toxic VOCs in soil.

Comments

This is a manuscript of an article published as Orazbayeva, Dina, Bulat Kenessov, Jacek A. Koziel, Dayana Nassyrova, and Nadezhda V. Lyabukhova. "Quantification of BTEX in Soil by Headspace SPME–GC–MS Using Combined Standard Addition and Internal Standard Calibration." Chromatographia 80, no. 8 (2017): 1249-1256. The final publication is available at Springer via DOI: 10.1007/s10337-017-3340-0. Posted with permission.

Copyright Owner

Springer-Verlag GmbH Germany

Language

en

File Format

application/pdf

Available for download on Wednesday, August 01, 2018

Published Version

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