RGA Spectra Data – Interpretation Guide
See legend below for explanations
AMU # |
CHEMICAL SYMBOL |
SOURCES |
1 |
H |
Water Fragment or Hydrogen Fragment |
2 |
H2, D |
Hydrogen, Deuterium (H2) |
3 |
HD, H3 |
Hydrogen Deuterium, Tritium (H3) |
4 |
He |
Helium |
5 |
No known elements |
|
6 |
C++ |
Doubly Ionized C12 (Rare) |
7 |
N++ |
Doubly Ionized N14 (Rare) |
8 |
O++ |
Doubly Ionize O16 (Rare) |
9 |
No known elements |
|
10 |
Ne++ |
Doubly Ionized Ne20 (Rare) |
11 |
Ne++ |
Doubly Ionized Ne22 (Rare) |
12 |
C |
Carbon, Carbon Monoxide Fragment, Carbon Dioxide Fragment |
13 |
CH, C13 |
Methane Fragment, Carbon Isotope |
14 |
N, CH2 |
Nitrogen, Methane Fragment or See Note 1 |
15 |
CH3 |
Methane Fragment or See Note 1 |
16 |
O, CH4, NH2 |
Oxygen or Carbon Monoxide Fragment, Methane Parent Ion, Ammonia Fragment |
17 |
OH, NH3 |
Water Fragment, Ammonia Parent Ion |
18 |
H2O |
Water Parent Ion |
19 |
F |
Fluorine or Freon Fragment |
20 |
Ar++, Ne, NF |
Doubly Ionized Argon, Neon Hydrofluroic Acid |
21 |
No known elements |
|
22 |
Ne22 |
Neon Isotope |
23 |
No known elements |
|
24 |
C2 |
|
25 |
C2H |
|
26 |
C2H2, CN |
See Note 1, Hydrogen Cyanide Fragment |
27 |
C2H3, Al, HCN |
See Note 1, Aluminum, Hydrogen Cyanide |
28 |
N2, CO, C2H4, Si |
Nitrogen, Carbon Monoxide, Ethylene Parent Ion, Silicon |
29 |
CH3CH2 |
Ethane Fragment or Ethanol Fragment or Isopropyl Alcohol Fragment |
30 |
C2H6, NO |
Ethane Parent, Nitric Oxide |
31 |
P, CH2OH, CF |
Phosphorus, Methanol Fragment, Ethanol Fragment, Freon Fragment |
32 |
O2, CH3OH, S |
Oxygen, Methanol Parent Ion, Sulfur |
33 |
HS |
Hydrogen Sulfide Fragment |
34 |
H2S, S34 |
Hydrogen Sulfide Parent Ion, Sulfur Isotope |
35 |
Cl |
Chlorine Isotope, See Note 2 |
36 |
HCl, Ar36 |
Hydrochloric Acid, Argon Isotope |
37 |
Cl37 |
Chlorine Isotope, See Note 2 |
38 |
HCl37 |
Hydrochloric Acid or See Note 2 |
39 |
C3H3 |
|
40 |
Ar, C3H4 |
Argon, See Note 1 |
41 |
C3 H5 |
|
42 |
C3 H6 |
|
43 |
C3H7, CH3CO |
See Note 1, Acetone Fragment or Methyl Ethyl Ketone Fragment |
44 |
CO2, C3H8 |
Carbon Dioxide, See Note 3 |
45 |
CH3CH2O |
Ethanol Fragment or Isopropyl Alcohol Fragment |
46 |
CH3CH2OH |
Ethanol Parent Ion |
47 |
CCl35 |
|
48 |
HCCl35, SO |
See Note 2, Sulfur Dioxide Fragment |
49 |
CCl37, SiOH |
See Note 2, Pump Oil Fragment |
50 |
CCl37, CF2, C4H2 |
See Note 2, Freon Fragment, See Note 3 |
Legend
- Fragments of several hydrocarbons, such as mechanical pump oil, diffusion pump oil, vacuum grease, cutting oil, and organic solvents.
- Fragments of several chlorinated hydrocarbons such as carbon tetrachloride, trichlorethylene and many Freons.
- Fragments from both straight chain hydrocarbons and benzene ring hydrocarbons.