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40 ppb Volatiles in Drinking Water on Rtx-VMS by EPA Method 524.4

Peaks
1.Dichlorodifluoromethane
2.Chlorodifluoromethane
3.Chloromethane
4.Vinyl chloride
5.1,3-Butadiene
6.Bromomethane
7.Trichlorofluoromethane
8.Diethyl ether
9.1,1-Dichloroethene
10.Carbon disulfide
11.Methyl iodide
12.Allyl chloride
13.Methylene chloride
14.trans-1,2-Dichloroethene
15.Methyl acetate
16.MTBE-d3 (SS)
17.MTBE
18.tert-Butyl alcohol (TBA)
19.Diisopropyl ether (DIPE)
20.1,1-Dichloroethane
21.tert-Butyl ethyl ether (ETBE)
22.cis-1,2-Dichloroethene
23.Bromochloromethane
24.Chloroform
25.Carbon tetrachloride
26.Tetrahydrofuran
27.1,1,1-Trichloroethane
28.1,1-Dichloropropene
29.1-Chlorobutane
30.Benzene
31.tert-Amyl methyl ether (TAME)
32.1,2-Dichloroethane
33.Trichloroethene
34.1,4-Difluorobenzene
35.tert-Amyl ethyl ether (TAEE)
36.Dibromomethane
37.1,2-Dichloropropane
38.Bromodichloromethane
39.cis-1,3-Dichloropropene
40.Toluene
41.Tetrachloroethene
Peaks
42.trans-1,3-Dichloropropene
43.1,1,2-Trichloroethane
44.Ethyl methacrylate
45.Dibromochloromethane
46.1,3-Dichloropropane
47.1,2-Dibromoethane
48.Chlorobenzene-d5
49.Chlorobenzene
50.Ethylbenzene
51.1,1,1,2-Tetrachloroethane
52.m-Xylene
53.p-Xylene
54.o-Xylene
55.Styrene
56.Bromoform
57.Isopropylbenzene
58.4-Bromofluorobenzene (SS)
59.Bromobenzene
60.n-Propylbenzene
61.1,1,2,2-Tetrachloroethane
62.2-Chlorotoluene
63.1,3,5-Trimethylbenzene
64.1,2,3-Trichloropropane
65.4-Chlorotoluene
66.tert-Butylbenzene
67.Pentachloroethane
68.1,2,4-Trimethylbenzene
69.sec-Butylbenzene
70.4-Isopropyltoluene
71.1,3-Dichlorobenzene
72.1,4-Dichlorobenzene-d4
73.1,4-Dichlorobenzene
74.n-Butylbenzene
75.Hexachloroethane
76.1,2-Dichlorobenzene-d4 (SS)
77.1,2-Dichlorobenzene
78.1,2-Dibromo-3-chloropropane
79.Hexachlorobutadiene
80.1,2,4-Trichlorobenzene
81.Naphthalene
82.1,2,3-Trichlorobenzene
C. Contamination from nitrogen gas line; * Toluene-d8
image
GC_EV1351
ColumnRtx-VMS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 19915)
Sample524.3 Internal standard/surrogate mix (cat.# 30017)
524.3 Gas calibration mix (cat.# 30014)
524.3 VOA MegaMix standard (cat.# 30013)
Diluent:RO water
Conc.:40 ng/mL (5 mL sample)
Injectionpurge and trap split (split ratio 30:1)
Liner:Premium 1.0 mm ID straight inlet liner (cat.# 23333.1)
Inj. Temp.:200 °C
Purge and Trap
Instrument:EST Encon Evolution
Trap Type:Vocarb 3000
Purge: 11 min, flow 40 mL/min
Dry Purge: 1 min, flow 50 mL/min
Desorb: 1 min @ 260 °C, flow 30.9 mL/min
Bake: 8 min @ 265 °C
Interface Connection:injection port
Transfer Line Temp.:150 °C
Oven
Oven Temp.:45 °C (hold 4.5 min) to 100 °C at 12 °C/min to 240 °C at 25 °C/min (hold 1.32 min)
Carrier GasHe, constant flow
Flow Rate:0.9 mL/min
DetectorMS
Mode:Scan
Scan Program:
GroupStart Time
(min)
Scan Range
(amu)
Scan Rate
(scans/sec)
11.547–3005.4
22.935–3005.19
Transfer Line Temp.:240 °C
Analyzer Type:Quadrupole
Source Temp.:230 °C
Quad Temp.:150 °C
Electron Energy:70 eV
Solvent Delay Time:1.5 min
Tune Type:BFB
Ionization Mode:EI
InstrumentAgilent 7890A GC & 5975C MSD
NotesNitrogen was used as the purge gas for the EST Encon Evolution.
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