EPA Method 524.2, Revision 4 Rtx-VMS

GC_EV00430

	Peaks	Conc. (ppb)
1.	Dichlorodifluoromethane
2.	Chloromethane
3.	Vinyl chloride
4.	Bromomethane
5.	Chloroethane
6.	Trichlorofluoromethane
7.	Diethyl ether
8.	1,1-Dichloroethene
9.	Carbon disulfide	40
10.	Iodomethane	40
11.	Allyl chloride
12.	Methylene Chloride
13.	Acetone
14.	trans-1,2-Dichloroethene
15.	Methyl tert-butyl ether
16.	1,1-Dichloroethane
17.	Acrylonitrile
18.	cis-1,2-Dichloroethene
19.	2,2-Dichloropropane
20.	Bromochloromethane
21.	Chloroform
22.	Methyl acrylate
23.	Carbon Tetrachloride
24.	Tetrahydrofuran	40
25.	1,1,1-Trichloroethane
26.	2-Butanone
27.	1,1-Dichloropropene
28.	1-Chlorobutane

	Peaks	Conc. (ppb)
29.	Benzene
30.	Propionitrile
31.	1,2-Dichloroethane
32.	Fluorobenzene
33.	Trichloroethene
34.	Dibromomethane
35.	1,2-Dichloropropane
36.	Bromodichloromethane
37.	Methyl methacrylate
38.	cis-1,3-Dichloropropene
39.	Toluene
40.	Chloroacetonitrile
41.	2-Nitropropane*
42.	1,1-Dichloropropanone*
43.	4-Methyl-2-pentanone
44.	Tetrachloroethene
45.	trans-1,3-Dichloropropene
46.	Ethyl methacrylate
47.	1,1,2-Trichloroethane
48.	Dibromochloromethane
49.	1,3-Dichloropropane
50.	1,2-Dibromoethane
51.	2-Hexanone
52.	Ethylbenzene
53.	Chlorobenzene
54.	1,1,1,2-Tetrachloroethane
55.	m-Xylene
56.	p-Xylene

	Peaks	Conc. (ppb)
57.	o-Xylene
58.	Styrene
59.	Bromoform
60.	Isopropylbenzene
61.	4-Bromofluorobenzene
62.	n-Propylbenzene
63.	Bromobenzene
64.	1,1,2,2-Tetrachloroethane
65.	1,3,5-Trimethylbenzene
66.	2-Chlorotoluene
67.	1,2,3-Trichloropropane
68.	trans-1,4-Dichloro-2-butene
69.	4-Chlorotoluene
70.	tert-Butylbenzene
71.	1,2,4-Trimethylbenzene
72.	Pentachloroethane
73.	sec-Butylbenzene
74.	p-Isopropyltoluene
75.	1,3-Dichlorobenzene
76.	1,4-Dichlorobenzene
77.	n-Butylbenzene
78.	Hexachloroethane
79.	1,2-Dichlorobenzene-D4
80.	1,2-Dichlorobenzene
81.	1,2-Dibromo-3-Chloropropane
82.	Nitrobenzene
83.	Hexachlorobutadiene
84.	1,2,4-Trichlorobenzene
85.	Naphthalene
86.	1,2,3-Trichlorobenzene

*These peaks (41 and 42) share a quantitation ion (43)

Oven
Column	Rtx-VMS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 19915)
Standard/Sample	502.2 Calibration Mix #1 (gases) (cat.# 30042)
	502.2 CAL2000 MegaMix Mixture (cat.# 30431)
	524 Calibration Mix #7 Kit (cat.# 30202)
	524 Calibration Mix #8 (cat.# 30203)
	524 Internal Standard/Surrogate Mix (cat.# 30201)
Conc.:	20ppb in 5mL of RO water (unless otherwise noted); ketones at 40ppb.
Injection	purge and trap split (split ratio 10:1)
Purge and Trap
Instrument:	Tekmar LSC-3000 Purge and Trap
Trap Type:	Vocarb 3000
Purge:	11 min, flow 40 mL/min
Dry Purge:	1 min, flow 40 mL/min
Desorb Preheat Temp.:	245 °C
Desorb:	2 min @ 250 °C
Bake:	8 min @ 260 °C
Transfer Line Tubing:	5m, 0.32mm ID Siltek Guard Column(cat.# 10027)
Oven Temp.:	45 °C (hold 2 min) to 85 °C at 14 °C/min to 210 °C at 40 °C/min (hold 4 min)
Carrier Gas	He, constant flow
Flow Rate:	1.3 mL/min

Detector	MS
Mode:	Scan
Scan Range:	35-300 amu
Instrument	HP6890 GC & 5973 MSD
Notes	Adjust dichlorodifluoromethane to a retention time of 2.29 min. @ 45° Dry purge: MCS bypassed

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