RGA Spectra Data

Interpretation Guide

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	See Note 1
25	C2H	See Note 1
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	See Note 3
40	Ar, C3H4	Argon, See Note 1
41	C3 H5	See Note 1
42	C3 H6	See Note 1
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	See Note 2
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

NOTES:

1. Fragments of several hydrocarbons, such as mechanical pump oil, diffusion pump oil, vacuum grease, cutting oil, and organic solvents.
2. Fragments of several chlorinated hydrocarbons such as carbon tetrachloride, trichlorethylene and many Freons.
3. Fragments from both straight chain hydrocarbons and benzene ring hydrocarbons.