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. 2016 Jul 1;6:29098. doi: 10.1038/srep29098

Figure 3. Quantification of NO2− and NO3− produced by He plasma.

Figure 3

Solutions of PBS(Ca2+/Mg2+) were exposed to He plasma for 1, 2, 3, or 4 min and the concentration of NO2− and NO3− determined as described in Material and Methods. Note that NO2− and NO3− were not detectable in untreated (0 min) PBS(Ca2+/Mg2+). The data are the mean ± SD of 3 independent experiments. The He flow was set to 50 sccm and the output voltage to 8 kV.