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required limits. The 90% purge & trap methanol and
10% water solvent system we use with this mix pro-
tects the keto group in 2-butanone and prevents
acetal formation (e.g., in methanol). We include
methyl tert-butyl ether in the new mix because of its
wide use as a gasoline additive.
New Skinner List - SV MegaMixTM reference mix com-
bines the semivolatiles and acid extractables, to
greatly shorten preparation time. Because 3-
methylphenol and 4-methylphenol coelute, each is
included at half the concentration of the other com-
pounds; users of the mix can calibrate at lower lev-
els in order to quantify these compounds at the
required limits. The only compound of potential
interest excluded from the new mix is benzenethiol
(part of the 1985 Skinner List, but an optional con-
stituent in the 1997 revision), because it is unstable
and rapidly degrades in methylene chloride. All other
compounds, regular and optional, are included.
• 11 •
2003 Volume 2
800-356-1688
By Ken Herwehe, Analytical Reference Materials Product Marketing Manager
Save Preparation and Calibration
Time in Skinner List Analyses
With New Restek Reference Mixes
✔ Eliminate preparation time:
- All target volatiles in one mix.
- All target semivolatiles in one mix.
✔ Fast, convenient, single calibrations:
- m- and p-xylene at one-half concentration of other volatiles.
- 3- and 4-methylphenol at one-half concentration of other semivolatiles.
✔ Volatiles mix includes methyl tert-butyl ether (MTBE).
✔ Semivolatiles mix includes optional low concentration polynuclear aromatic
hydrocarbons and optional semivolatile organics (indene, dibenzo(a,h)acridine,
1-methylnaphthalene).
In our continual effort to help chromatographers
simplify their analyses, we have introduced two new
reference mixes for analyses of Skinner List* volatile
and semivolatile organic compounds in petroleum
refinery waste.
Skinner List - SV MegaMix™
(33 components, peak list in Figure 1.)
2,000µg/mL each in methylene chloride (3&4 methyl
phenol at 1,000µg/mL each), 1mL/ampul
**Benzenethiol, excluded from the mix for stability and an optional compound on the current list, is available by
custom order.
Skinner List - Volatiles
(19 components, peak list in Figure 2.)**
2,000µg/mL each in methanol:water (90:10) (m&p
xylene at 1,000µg/mL each), 1mL/ampul
Each 5-pk. 10-pk.
30491 30491-510 —
w/data pack
30491-500 30491-520 30591
Because m-xylene and p-xylene coelute, we include
each of these isomers at half the concentration of the
other compounds in our Skinner List - Volatiles mix.
By using this mix, analysts will not have to run an
extra calibration to quantify m- and p-xylene at
Detailed information about Skinner List
compounds is available from the US EPA.
Follow the link:
Each 5-pk. 10-pk.
31690 31690-510 —
w/data pack
31690-500 31690-520 31790
Figure 1 — Calibrate for all Skinner List semivolatiles, including methylphenol isomers,
using one Restek reference mix.
Figure 2 — Calibrate for xylene isomers
with other Skinner List volatiles, using
Restek reference mix.
*1997 Region 5 Skinner List.
Rtx®- 502.2, 105m, 0.32 ID, 0.18µm (cat.# 10921)
Sample: Skinner List - Volatiles (cat.# 30491)
2000µg/mL each component,
m- & p-xylene at 1000µg/mL
Inj.: 1.0µL split (split ratio 1:20), 4mm split
inlet liner with wool (cat.#20782)
Inj. temp.: 200°C
Carrier gas: helium, constant pressure
Column flow: 2.2mL/min.
Oven temp.: 40°C (hold 6 min.) to 240°C @ 6°C/min.
(hold 5 min.)
Det.: MSD
Transfer line temp.: 250°C
Scan range: 35–425 amu
Ionization: EI
Mode: TIC
GC_ST00677
1. carbon disulfide
2. methyl tert-butyl ether
3. 1,1-dichloroethane
4. 2-butanone
5. chloroform
6. 1,1,1-trichloroethane
7. 1,2-dichloroethane
8. benzene
9. trichloroethylene
10. 1,4-dioxane
11. toluene
12. tetrachloroethylene
13. 1,2-dibromoethane
14. chlorobenzene
15. ethylbenzene
16. m-xylene
17. p-xylene
18. o-xylene
19. styrene
GC_EV00684
Rtx ®-5Sil MS 30m, 0.25mm ID, 0.25µm (cat.# 12723)
Sample: Skinner SV MegaMix™ 2,000µg/mL in methylene chloride (cat.# 31690) = MegaMixTM component (•)
B/N Surrogate Mix 1,000µg/mL in methylene chloride (cat.# 31024)
Acid Surrogate Mix 2,000µg/mL in methylene chloride (cat.# 31025)
SV Internal Standard Mix 2,000µg/mL in methylene chloride (cat.# 31206)
Inj.: 1.0µL splitless (hold 0.4 min.), Drilled Uniliner® w/ hole at bottom (cat.# 20756)
Inj. temp.: 275°C
Carrier gas: helium, constant flow
Flow rate: 1mL/min.
Oven temp.: 35°C (hold 1 min.) to 260°C @ 20°C/min. to 300°C @ 6°C/min. (hold 1 min.)
Det: MS
Transfer line temp.: 280°C
Scan range: 35-550amu
Ionization: EI
Mode: scan
1. pyridine•
2. 2-fluorophenol
3. phenol-d6 (SS)
4. phenol•
5. 1,3-dichlorobenzene•
6. 1,4-dichlorobenzene-d4 (IS)
7. 1,4-dichlorobenzene•
8. 1,2-dichlorobenzene•
9. 2-methylphenol•
10. indene•
11. 4-methylphenol•
12. 3-methylphenol•
13. nitrobenzene-d5 (SS)
14. 2,4-dimethylphenol•
15. naphthalene-d8 (IS)
16. naphthalene•
17. quinoline•
18. 1-methylnaphthalene•
19. 2-fluorobiphenyl (SS)
20. dimethylphthalate•
21. acenaphthene-d10 (IS)
22. acenaphthene•
23. 2,4-dinitrophenol•
24. 4-nitrophenol•
25. diethyl phthalate•
26. fluorene•
27. 2,4,6-tribromophenol (SS)
28. phenanthrene-d10 (IS)
29. phenanthrene•
30. anthracene•
31. di-n-butylphthalate•
32. fluoranthene•
33. pyrene•
34. p-terphenyl-d14 (SS)
35. benz(a)anthracene•
36. chrysene-d12 (IS)
37. chrysene•
38. bis(2-ethylhexyl)phthalate•
39. benzo(b)fluoranthene•
40. benzo(k)fluoranthene•
41. benzo(a)pyrene•
42. perylene-d12 (IS)
43. dibenz(a,h)acridine•
44. indeno(1,2,3-cd)pyrene•
45. dibenz(a,h)anthracene•