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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Anal Chem. 2011 Jun 1;83(13):5337–5343. doi: 10.1021/ac200771g

Table 1.

Letter labels from the peaks in the four spectra in Figure 2 with corresponding m/z and empirical formula for the fragment ion.

PC spectra PE spectra
m/z Fragment ion m/z Fragment ion
a 27 [C2H3]+ k 27 [C2H3]+
30 [C2D3]+ 30 [C2D3]+
b 29 [C2H5]+ l 29 [C2H5]+
34 [C2D5]+ 34 [C2D5]+
c 41 [C3H5]+ m 41 [C3H5]+
46 [C3D5]+ 46 [C3D5]+
d 43 [C3H7]+ n 43 [C3H7]+
50 [C3D7]+ 50 [C3D7]+
e 55 [C4H7]+ o 55 [C4H7]+
62 [C4D7]+ 62 [C4D7]+
f 57 [C4H9]+ P 57 [C4H9]+
66 [C4D9]+ 66 [C4D9]+
g 86 [C5H12N]+ q 67 [C5H7]+
98 [C5D12N]+ 74 [C5D7]+
h 104 [C5H14NO]+ r 69 [C5H9]+
118 [C5D14NO]+ 76 [C5D9]+
i 166 [C5H13NPO3]+ s 124 [C2H7NPO3]+
179 [C5D13NPO3]+ t 142 [C2H9NPO4]+
J 184 [C5H15NPO4]+
197 [C5D13NPO4H2]+
198 [C5Di4NPO4H]+
199 [C5D15NPO4]+