Table 1. Summary of All Peaks Present in at Least Three Impact Spectraa
m/z 	Percent of Spectra With Given Peak 	Peak Assignment 	Mass Resolution
1 	77 	H+ 	20–25
2 	15 	H2+ 	 
3 	0.6 	H3+ 	 
7 	8 	Li+ 	 
12 	59 	C+ 	50–150
13 	0.7 	CH+ 	 
16 	28 	O+ 	 
23 	98 	Na+ 	5–200 (typically 100)
27 	1.5 	Al+ 	 
28 	1.0 	CO+ or Si+ ? 	 
39 (41) 	99.5 	K+ 	5–200 (typically 100)
40 	37b 	Ar+, SiC+ or Ca+ ? 	 
56 (54) 	16 	Fe+ 	150–350
63 (65) 	8 	Cu+ 	150–350
181 	9 	Ta+ 	300–600
197 	6 	TaO+ 	 
aMass resolution (m/Deltam at FWHM) is given for important peaks.
bPeaks may have been obscured by broad potassium lines; hence the occurrence of this peak may be more frequent than indicated. href for tab01cannot be found in tables.shtml.