Single component integration


Gasoline Range Organics


Environmental Laboratory 19 Average Measured


Conc. (µg/L, n = 10)


Single Component Integration


Methyl tert-butyl ether (MTBE)


Benzene Toluene


Ethylbenzene


m-Xylene, p-Xylene o-Xylene


EPA 8015 C Total Peak Area Integration B


1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene


7.1 3.7


141.2 24.8 53.1 53.7 8.0


31.1


Average Measured Conc. (µg/L, n = 10)


Total Area Integration (Wisconsin)


53.3 53.3


53.3 53.3 53.3 53.3 53.3 53.3


Total Peak Area Integration


(EPA 8015 C)


56.0 56.0


56.0 56.0 56.0 56.0 56.0 56.0


Figure 4. Example of tap water sample (5 mL) spiked with raw gasoline solution (5%) chromatogram applying single component integration (A) and total area integration (EPA 8015 C integration window), (B). Chromeleon “Peak Results” view (C) allows the display of the peak results for both integration types. Average quantitative results for n = 10 tap water samples spiked with raw gasoline and integrated using single components and total area are reported in the table (D).


Author Contact Details Giulia Riccardino and Cristian Cojocariu, Thermo Fisher Scientific • Tudor Rd, Runcorn WA7, UK • Tel: 01928 534000 • Web: www.thermofisher.com


C


D


Figure 4. Example of tap water sample (5 mL) spiked with raw gasoline solution (5%) chromatogram applying single component integration (A) and total area integration (EPA 8015 C integration window), (B). Chromeleon “Peak Results” view (C) allows the display of the peak results for both integration types. Average quantitative results for n = 10 tap water samples spiked with raw gasoline and integrated using single components and total area are reported in the table (D).


Figure 5. Comparison between chromatograms obtained analyzing n = 5 blank water vials after completing the sample sequence and a sample spiked with 1 µL of raw gasoline solution (5%) (red trace). None of the investigated gasoline organics or any residual matrix components could be detected in the blank water.


www.envirotech-online.com AET October / November 2019


MTBE


Benzene


Toluene


Ethylbenzene o-Xylene


m-Xylene, p-Xylene


1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene


Naphthalene


A


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