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EPA Method 530 UCMR4 Standard at Method Reporting Limit on Rxi-5Sil MS (SIM)

PeakstR (min)Conc.
1.o-Toluidine-d9 (SS)5.641.0
3.Quinoline-d7 (SS)8.221.0
5.Butylated hydroxyanisole (BHA)11.500.30
6.Acenaphthene-d10 (IS)11.541.0
7.Phenanthrene-d10 (IS)15.051.0
ColumnRxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Standard/SampleMethod 530 UCMR4 standard (cat.# 572262)
Method 530 UCMR4 surrogate standard (cat.# 572265)
Method 530 UCMR4 internal standard (cat.# 572266)
Inj. Vol.:1 µL pulsed splitless (hold 1.0 min)
Liner:Topaz 4 mm ID single taper inlet liner w/wool (cat.# 23303)
Inj. Temp.:275 °C
Pulse Pressure:30 psi (206.8kPa)
Pulse Time:1.05 min
Purge Flow:60 mL/min
Oven Temp.:70 °C (hold 1.5 min) to 200 °C at 10 °C/min to 320 °C at 7 °C/min (hold 3 min)
Carrier GasHe, constant flow
Flow Rate:1.2 mL/min
SIM Program:
GroupStart Time
Ion(s) (m/z)Dwell (ms)
11.543106, 107, 112, 114 25
26.917102, 108, 129, 136 25
39.881137, 162, 164, 180 25
413.297160, 188 25
Transfer Line Temp.:280 °C
Analyzer Type:Quadrupole
Source Type:Stainless Steel
Drawout Plate:6 mm ID
Source Temp.:280 °C
Quad Temp.:180 °C
Solvent Delay Time:1.45 min
Tune Type:DFTPP
Ionization Mode:EI
InstrumentHP6890 GC & 5973 MSD
NotesThe EPA Method 530 UCMR4 standard analyte concentrations vary to simplify preparing ICAL levels based on the minimum method reporting levels.

The Method was developed on the Rtx-1701 column, but allows the use of any column with adequate selectivity. These target analytes are often included in EPA Method 8270, which uses the Rxi-5Sil MS column.