This work reports validation of analytical method for determination of monoaromatic hydrocarbons, such as benzene, toluene, and xylenes (BTX) using portable membrane inlet mass spectrometer (MIMS) with a quadrupole mass analyser. Our analysis of BTX from the river canal water that is used for irrigation, presents a detailed analytical method for rapid, self-contained, field transportable screening and quantitative analysis for environmental monitoring. The validation study showed that in the analytical range of 10-250 µg/L, the correlation coefficient for all analytes were greater than 0.99, the accuracy was in the range of 95.32-104.30 %, the repeatability precision was less than 10 %, and the satisfactory selectivity of the method was proven. The LOD and LOQ values were ranged respectively for benzene, toluene, and xylene with 4.88, 7.43 and 7.46 µg/L for LOD and 16.27, 24.77 and 27.85 µg/L for LOQ. The method was benchmarked against lab-based GC-MS with accuracy proven for the target compounds.

This article is Open Access

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