40 mL of Electronic Cigarette Vapor Collected on a Thermal Desorption Tube and Analyzed on Rtx-VMS

	Peaks	t_R (min)	Match Quality	Vapor	Blank*	Region
1.	Nitrogen/oxygen	0.685	100	x	x	Red
2.	Carbon dioxide	1.063	100	x	x	Red
3.	Propene	1.200	100	x		Red
4.	Formaldehyde	1.227	100	x		Red
5.	Sulfur dioxide	1.313	90	x		Red
6.	Chloromethane	1.380	100	x		Red
7.	Water	1.453	100	x	x	Red
8.	Acetaldehyde	1.672	100	x		Red
9.	Methanol	1.715	100	x	x	Red
10.	Unidentified	1.885		x		Red
11.	Ethanol	2.270	100	x		Red
12.	Unidentified	2.331		x		Red
13.	Unidentified	2.410		x		Red
14.	Acrolein	2.581	100	x		Red
15.	Propanal	2.629	100	x		Red
16.	Methylene chloride	2.770	100	x	x	Red
17.	Acetone	2.843	100	x		Red
18.	Unidentified	2.892		x		Red
19.	Hexane	2.928	100	x		Red
20.	Acetonitrile	3.160	100	x	x	Red
21.	Unidentified	3.544		x		Orange
22.	Unidentified	3.842		x		Orange
23.	Trimethylsilanol	3.928	100	x		Orange
24.	Unidentified	4.092		x		Orange
25.	Unidentified	4.159		x		Orange
26.	Unidentified	4.245		x		Orange
27.	Unidentified	4.354		x		Orange
28.	Benzene	4.452	100	x	x	Orange
29.	Unidentified	4.519		x		Orange
30.	Acetic acid	5.055	86	x		Orange
31.	Unidentified	5.141		x		Orange
32.	Unidentified	5.647		x		Orange
33.	Unidentified	5.756		x		Orange
34.	1-Hydroxy-2-propanone	6.073	80	x		Orange
35.	Unidentified	6.165		x		Orange
36.	Unidentified	6.220		x		Orange
37.	Toluene	6.280	100	x	x	Orange
38.	Hexamethylcyclotrisiloxane	6.506	91	x		Orange
39.	Unidentified	7.231		x		Orange
40.	Unidentified	7.530		x		Orange
41.	Propylene glycol	7.737	100	x		Green
42.	m-Xylene	8.048	100	x		Green
43.	p-Xylene	8.048	100	x		Green
44.	o-Xylene	8.530	100	x		Green
45.	Styrene	8.597	100	x		Green
46.	Unidentified	9.158		x		Green
47.	Octamethylcyclotetrasiloxane	9.218	91	x		Green
48.	4-Methyl-1-(1-methylethyl)cyclohexene	9.371	95	x		Green
49.	Unidentified	9.639		x		Green
50.	Unidentified	9.852		x		Green
51.	Unidentified	9.932		x		Green
52.	Unidentified	10.121		x		Green
53.	Unidentified	10.219		x		Green
54.	Trimethylpyrazine	10.468	80	x		Green
55.	Benzaldehyde	10.657	100	x		Green
56.	Unidentified	10.858		x		Green
57.	Unidentified	11.120		x		Green
58.	Unidentified	11.187		x		Green
59.	Acetylpyrazine	11.541	93	x		Green
60.	Decamethylcyclopentasiloxane	11.620	91	x		Green
61.	Phenol	11.870	94	x		Green
62.	Unidentified	12.272		x		Green
63.	1,1'-Oxybis-2-propanol	12.333	90	x		Green
64.	Glycerin	12.748	100	x		Blue
65.	Unidentified	13.327		x		Blue
66.	Dodecamethylcyclohexasiloxane	13.979	94	x		Blue
67.	Nicotine	15.862	100	x		Blue
68.	Tetradecamethylhexasiloxane	16.082	91	x		Blue
69.	Unidentified	16.326		x		Blue
70.	Unidentified	16.460		x		Blue
71.	Myosmine	17.216	94	x		Blue
72.	Nicotyrine	17.807	90	x		Blue
73.	Unidentified	18.002		x		Blue
74.	2,3'-Dipyridyl	18.618	94	x		Blue
75.	Unidentified	18.721		x		Blue
76.	Unidentified	19.294		x		Blue
77.	Unidentified	19.611		x		Blue
78.	Unidentified	20.093		x		Blue
79.	Unidentified	20.190		x		Blue
80.	Unidentified	20.269		x		Blue
81.	Unidentified	20.501		x		Blue
82.	Unidentified	20.855		x		Blue

*The concentrations of these compounds in e-cigarette vapor were too close to blank and/or laboratory air concentrations to definitively state they were emitted from the e-cigarettes.

Standard/Sample
Column	Rtx-VMS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 19915)
Conc.:	One 40 mL puff of electronic cigarette vapor drawn via a gas-tight syringe to replicate vaping
Injection	Direct
Oven
Oven Temp.:	35 °C (hold 1 min) to 250 °C at 11 °C/min (hold 4 min)
Carrier Gas	He, constant flow
Flow Rate:	2.0 mL/min @ 35 °C

Detector

Mode:

Scan

Scan Program:

Group	Start Time (min)	Scan Range (amu)	Scan Rate (scans/sec)
1	0	15-550	5.2

Transfer Line Temp.:

250 °C

Analyzer Type:

Quadrupole

Source Type:

Extractor

Extractor Lens:

6mm ID

Source Temp.:

230 °C

Quad Temp.:

150 °C

Electron Energy:

70 eV

Tune Type:

BFB

Ionization Mode:

Preconcentrator

Markes UNITY™

Instrument

Agilent 7890B GC & 5977A MSD

Acknowledgement

Markes

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