Trimethylsilanol on Rtx-VMS (30 m)

	Peaks	t_R (min)
1.	Bromochloromethane (IS)	5.478
2.	Trimethylsilanol	5.619
3.	Hexamethyldisiloxane	5.860
4.	1,4-Difluorobenzene (IS)	6.832
5.	Hexamethylcyclotrisiloxane	8.852
6.	Chlorobenzene-d5 (IS)	10.611
7.	4-Bromofluorobenzene*	12.498

*Tuning standard

Oven
Column	Rtx-VMS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 19915)
Standard/Sample	Trimethylsilanol
	TO-14A internal standard/tuning mix (cat.# 34408)
Diluent:	Nitrogen
Conc.:	See notes
Injection	Direct
Oven Temp.:	32 °C (hold 1 min) to 150 °C at 8 °C/min to 230 °C at 33 °C/min
Carrier Gas	He, constant flow
Flow Rate:	1.2 mL/min
Linear Velocity:	40 cm/sec @ 32 °C

Detector

Mode:

SIM

SIM Program:

Group	Start Time (min)	Ion(s) (m/z)	Dwell (ms)
1	0.00	49, 130, 128, 51, 75, 45, 47, 59, 147, 73, 148, 66	25
2	6.25	114, 63, 88, 57	50
3	7.00	207, 208, 96, 191	50
4	10.00	117, 82, 52, 54	50
5	12.00	50, 75, 95, 96, 173, 174, 175, 176, 177	25

Transfer Line Temp.:

230 °C

Analyzer Type:

Quadrupole

Source Temp.:

230 °C

Quad Temp.:

150 °C

Solvent Delay Time:

1.00 min

Tune Type:

BFB

Ionization Mode:

Preconcentrator

Nutech 8900DS

Trap 1 Settings

Type/Sorbent :

Siltek-treated borosilicate glass beads (40/60 mesh)

Cooling temp:

-155 °C

Preheat temp:

5 °C

Preheat time:

0 sec

Desorb temp:

20 °C

Desorb flow:

5 mL/min

Desorb time:

360 sec

Bakeout temp:

200 °C

Flush flow:

120 mL/min

Flush time:

60 sec

Sweep flow:

120 mL/min

Sweep time:

60 sec

Trap 2 Settings

Type/Sorbent:

Tenax GR (80/100 mesh)

Cooling temp:

-35 °C

Desorb temp:

190 °C

Desorb time:

30 sec

Bakeout temp:

200 °C

Bakeout time:

10 sec

Cryofocuser

Cooling temp:

-160 °C

Inject time:

140 sec

Internal Standard

Purge flow:

100 mL/min

Purge time:

6 sec

Vol.:

100 mL

ISTD flow:

100 mL/min

Standard

Size:

200 mL

Purge flow:

100 mL/min

Purge time:

6 sec

Sample flow:

100 mL/min

Instrument

HP6890 GC & 5973 MSD

Notes

400 mL of 47.6 pptv trimethylsilanol and 100 mL of 20.0 ppbv internal standards prepared at 45% relative humidity (RH).

Acknowledgement

Nutech Instruments/EST Analytical

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