required limits. The 90% purge& trapmethanol and
10%water solvent systemwe usewith thismix pro-
tects the keto group in 2-butanone and prevents
acetal formation (e.g., inmethanol). We include
methyl
tert
-butyl ether in the newmix because of its
wide use as a gasoline additive.
New Skinner List - SVMegaMix
TM
referencemix 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 themix 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 newmix is benzenethiol
(part of the 1985 Skinner List, but an optional con-
stituent in the 1997 revision), because it is unstable
and rapidly degrades inmethylene chloride. All other
compounds, regular and optional, are included.
• 11 •
2003
Volume 2
800-356-1688
By KenHerwehe, Analytical ReferenceMaterials Product MarketingManager
Save Preparation and Calibration
Time in Skinner List Analyses
WithNewRestekReferenceMixes
✔
Eliminate preparation time:
- All target volatiles in onemix.
- All target semivolatiles in onemix.
✔
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.
✔
Volatilesmix includesmethyl
tert
-butyl ether (MTBE).
✔
Semivolatilesmix 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
referencemixes for analyses of Skinner List* volatile
and semivolatile organic compounds in petroleum
refinery waste.
Skinner List - SVMegaMix
™
(33components, peak list inFigure1.)
2,000µg/mL each in methylene chloride (3&4 methyl
phenol at 1,000µg/mL each), 1mL/ampul
**Benzenethiol, excluded from themix for stability and an optional compound on the current list, is available by
custom order.
Skinner List - Volatiles
(19components, peak list inFigure2.)**
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 - Volatilesmix.
By using thismix, 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 theUSEPA.
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, includingmethylphenol isomers,
using one Restek referencemix.
Figure 2
—Calibrate for xylene isomers
with other Skinner List volatiles, using
Restek referencemix.
*1997Region 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 withwool (cat.#20782)
Inj. temp.:
200°C
Carrier gas:
helium, constant pressure
Column flow:
2.2mL/min.
Oven temp.:
40°C (hold 6min.) to 240°C@ 6°C/min.
(hold 5min.)
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 SVMegaMix
™
2,000µg/mL inmethylene chloride (cat.# 31690) =MegaMix
TM
component (•)
B/NSurrogateMix 1,000µg/mL inmethylene chloride (cat.# 31024)
Acid SurrogateMix 2,000µg/mL inmethylene chloride (cat.# 31025)
SV Internal StandardMix 2,000µg/mL inmethylene chloride (cat.# 31206)
Inj.:
1.0µL splitless (hold 0.4min.), DrilledUniliner
®
w/ hole at bottom (cat.# 20756)
Inj. temp.:
275°C
Carrier gas:
helium, constant flow
Flow rate:
1mL/min.
Oven temp.:
35°C (hold 1min.) to 260°C@ 20°C/min. to 300°C@ 6°C/min. (hold 1min.)
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•
