Volatile Organics by U.S. EPA Method 524.2 Revision IV on Rtx-VMS

GC_EV00718

	Peaks
1.	Dichlorodifluoromethane
2.	Chloromethane
3.	Vinyl chloride
4.	Bromomethane
5.	Chloroethane
6.	Trichlorofluoromethane
7.	Diethyl ether
8.	1,1-Dichloroethene
9.	Carbon disulfide
10.	Iodomethane
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
25.	1,1,1-Trichloroethane
26.	2-Butanone
27.	1,1-Dichloropropene
28.	1-Chlorobutane
29.	Propionitrile

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

	Peaks
59.	Styrene
60.	Bromoform
61.	Isopropylbenzene
62.	4-Bromofluorobenzene
63.	Bromobenzene
64.	n-Propylbenzene
65.	1,1,2,2-Tetrachloroethane
66.	2-Chlorotoluene
67.	1,2,3-Trichloropropane
68.	1,3,5-Trimethylbenzene
69.	trans-1,4-Dichloro-2-butene
70.	4-Chlorotoluene
71.	tert-Butylbenzene
72.	Pentachloroethane
73.	1,2,4-Trimethylbenzene
74.	sec-Butylbenzene
75.	p-Isopropyltoluene
76.	1,3-Dichlorobenzene
77.	1,4-Dichlorobenzene
78.	n-Butylbenzene
79.	Hexachloroethane
80.	1,2-Dichlorobenzene-D4
81.	1,2-Dichlorobenzene
82.	1,2-Dibromo-3-Chloropropane
83.	Nitrobenzene
84.	Hexachlorobutadiene
85.	1,2,4-Trichlorobenzene
86.	Naphthalene
87.	1,2,3-Trichlorobenzene

* Peaks 42 & 43 share an ion (43)

Oven
Column	Rtx-VMS, 30 m, 0.25 mm ID, 1.4 µm (cat.# 19915)
Standard/Sample	502.2 Calibration mix #1 (gases) (cat.# 30042)
	Drinking water VOA MegaMix, 524.2 rev. 4.1 (cat.# 30601)
	524 Internal standard/surrogate mix (cat.# 30201)
	Ketones mix, 524.2 rev. 4.1 (cat.# 30602)
Diluent:	RO water
Conc.:	Compounds at 20 ppb each in 5 mL RO water (ketones at 50 ppb; internal standards at 40 ppb)
Injection	purge and trap split (split ratio 30:1)
Liner:	1 mm split (cat.# 20972)
Inj. Temp.:	250 °C
Purge and Trap
Instrument:	Tekmar LSC-3100 purge and trap
Trap Type:	Vocarb 3000 (type K)
Purge:	11 min @ ambient, flow 40 ml/min
Dry Purge:	1 min, flow 40 ml/min
Desorb Preheat Temp:	245 °C
Desorb:	2 min @ 250 °C, flow 33 ml/min
Bake:	8 min @ 260 °C
Interface Connection:	injection port
Transfer Line Tubing:	Silcosteel transfer line
Oven Temp.:	40 °C (hold 2 min) to 85 °C at 14 °C/min (hold 2 min) to 220 °C at 30 °C/min (hold 4 min)
Carrier Gas	He, constant flow
Flow Rate:	1.1 mL/min
Dead Time:	1.48 min @ 40 °C

Detector	MS
Mode:	Scan
Transfer Line Temp.:	280 °C
Tune Type:	PFTBA/BFB
Ionization Mode:	EI
Scan Range:	35-300 amu
Notes	Dry purge: MCS bypassed using Silcosteel tubing

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