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Table 1 Possible ions corresponding to most abundant signals shown in Fig. 7

From: Methods of gas purification and effect on the ion composition in an RF atmospheric pressure plasma jet investigated by mass spectrometry

m/z He,H N,H O,H N,O,H C-containing
5 HHe +     
8 He\(_{2}^{+}\)     
9 HHe\(_{2}^{+}\)     
12 He\(_{3}^{+}\)     C +
14   N +    CH\(_{2}^{+}\)
15   NH +    CH\(_{3}^{+}\)
16 He\(_{4}^{+}\) NH\(_{2}^{+}\) O +   CH\(_{4}^{+}\)
17 HHe\(_{4}^{+}\) NH\(_{3}^{+}\) OH +   
18   NH\(_{4}^{+}\) H2O +   
19    H3O +   
27      C2H\(_{3}^{+}\), HCN +
28   N\(_{2}^{+}\)    C2H\(_{4}^{+}\), CO +
29   HN\(_{2}^{+}\)    C2H\(_{5}^{+}\)
30   H2N\(_{2}^{+}\)   NO + C2H\(_{6}^{+}\), COH\(_{2}^{+}\)
31     HNO +  
32    O\(_{2}^{+}\) N +(H2O)  
34    H2O\(_{2}^{+}\)   
37    H +(H2O)2   
42   N\(_{3}^{+}\)    
44     N2O + CO\(_{2}^{+}\)
46     NO\(_{2}^{+}\),N\(_{2}^{+}\)(H2O)  
48    O\(_{3}^{+}\) NO +(H2O)  
55    H +(H2O)3   
64     N\(_{2}^{+}\)(H2O)2  
66     NO +(H2O)2  
73    H +(H2O)4