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. 2011 Apr 8;6(4):e18471. doi: 10.1371/journal.pone.0018471

Figure 4. Indole standard curves generated by headspace SPME.

Figure 4

Chromatographic peak area is plotted as a function of indole concentration, illustrating fiber-dependent differences in the partition coefficient for indole. Peak areas taken from Fig. 3 were used to determine the concentration of indole extracted using each fiber (arrows).