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

	Peaks	t_R (min)	Conc. (µg/mL)
1.	o-Toluidine-d9 (SS)	5.64	1.0
2.	o-Toluidine	5.70	0.070
3.	Quinoline-d7 (SS)	8.22	1.0
4.	Quinoline	8.26	0.20
5.	Butylated hydroxyanisole (BHA)	11.50	0.30
6.	Acenaphthene-d10 (IS)	11.54	1.0
7.	Phenanthrene-d10 (IS)	15.05	1.0

Injection
Column	Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Standard/Sample	Method 530 UCMR4 standard (cat.# 572262)
	Method 530 UCMR4 surrogate standard (cat.# 572265)
	Method 530 UCMR4 internal standard (cat.# 572266)

Diluent:	Dichloromethane
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
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 Gas	He, constant flow
Flow Rate:	1.2 mL/min

Detector

Mode:

SIM

SIM Program:

Group	Start Time (min)	Ion(s) (m/z)	Dwell (ms)
1	1.543	106, 107, 112, 114	25
2	6.917	102, 108, 129, 136	25
3	9.881	137, 162, 164, 180	25
4	13.297	160, 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:

Instrument

HP6890 GC & 5973 MSD

Notes

The 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.

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