EPA Method 525.3 OPP Calibration Standard (with 525.3 Internal and Surrogate Standards) on Rxi-5Sil MS

	Peaks	t_R (min)
1.	Diisopropyl methylphosphonate (DIMP)	5.16
2.	1,3-Dimethyl-2-nitrobenzene (SS)	7.03
3.	Dichlorvos	7.80
4.	Mevinphos I	10.20
5.	Mevinphos II	10.25
6.	Acenaphthene-D10 (IS)	11.08
7.	Ethoprop	12.83
8.	Phorate	13.50
9.	Dimethipin	14.09
10.	Pentachlorophenol-C13 (IS)	14.19
11.	Phenanthrene-D10 (IS)	14.60
12.	Disulfoton	14.78

Injection
Column	Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Sample	EPA Method 525.3 OPP cal standard (cat.# 32543)
	EPA Method 525.3 PAH IS mix (cat.# 32547)
	EPA Method 525.3 PCP IS (cat.# 32548)
	EPA Method 525.3 surrogate standard (cat.# 32549)
Diluent:	Ethyl acetate
Conc.:	2 µg/mL
Inj. Vol.:	1 µL pulsed splitless (hold 1 min)
Liner:	Premium 4 mm single taper w/wool (cat.# 23303.1)
Inj. Temp.:	275 °C
Pulse Pressure:	30 psi (206.8kPa)
Pulse Time:	1 min
Purge Flow:	80 mL/min
Oven
Oven Temp.:	70 °C (hold 1 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:

Scan

Scan Program:

Group	Start Time (min)	Scan Range (amu)	Scan Rate (scans/sec)
1	5	45-550	5.5

Transfer Line Temp.:

280 °C

Analyzer Type:

Quadrupole

Source Type:

Extractor

Extractor Lens:

6 mm ID

Source Temp.:

350 °C

Quad Temp.:

200 °C

Solvent Delay Time:

5 min

Tune Type:

DFTPP

Ionization Mode:

Instrument

Agilent 7890B GC & 5977A MSD

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