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Hot Topics in Analytical & Chromatography - September 2009
In this issue, we address the following topics:
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 Vapor Intrusion - Old problem, new threat: Ground level contamination from underground storage tanks (UST) and industrial run-off is a fast-growing residential and commercial building health issue that has made Vapor Intrusion a Hot Topic.
Supelco offers the most comprehensive range of carbon-based adsorbents (Carbopack and Carbotrap) and carbon molecular sieves (Carboxen) to help analysts meet their difficult vapor intrusion sampling needs.
Vapor Intrusion monitoring requires different types of sampling media to investigate contamination by diverse compounds, including chlorinated VOCs like trichloroethylene (TCE) and vinyl chloride (VC), as well as BTEX, PAHs and PCBs. Supelco offers a wide range of both active and passive sampling media collection devices with our adsorbent technology inside to collect and measure these compounds.
Additional Information:
- Visit www.sigma-aldrich.com/vapor-intrusion
- Learn more about Supelco's range of adsorbents for air monitoring
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 On-demand Web Seminars - Interested in learning more about HPLC? Don’t have time to attend training sessions? Supelco has seminars available on the web, available 24 hours a day, 7 days a week for your viewing.
HPLC Web seminars cover topics such as HPLC Theory, column fundamentals, use of alternate selectivity, and high speed separations. Helpful videos demonstrating the use of our sample prep and Karl Fischer titration products are also available on demand. |
Additional Information:
- Visit www.sigma-aldrich.com/videos
- If you prefer to attend regional seminars in person, check out our regional seminar schedule at www.sigma-aldrich.com/analytical-seminars
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 Fast GC - In today’s analytical laboratory, it is becoming increasingly desirable to increase sample throughput without sacrificing quality.
The principles of Fast GC can be applied to do exactly this.
Fast GC was successfully used to reduce the analysis time for the GC-MS analysis of 86 semivolatile analytes in just 8.2 minutes. This analysis typically requires 15-20 minutes using conventional GC.
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| Peak IDs |
| 1. |
n-Nitrosodimethylamine |
30. |
Naphthalene-d8 (I.S.) |
59. |
2,4,6-Tribromophenol (surr.) |
| 2. |
Pyridine |
31. |
Naphthalene |
60. |
4-Bromophenyl phenyl ether |
| 3. |
2-Fluorophenol (surr.) |
32. |
4-Chloroaniline |
61. |
Hexachlorobenzene |
| 4. |
Phenol-d6 (surr.) |
33. |
Hexachlorobutadiene |
62. |
Pentachlorophenol |
| 5. |
Phenol |
34. |
4-Chloro-3-methylphenol |
63. |
Phenanthrene-d10 (I.S.) |
| 6. |
Aniline |
35. |
2-Methylnaphthalene |
64. |
Phenanthrene |
| 7. |
Bis(2-chloroethyl)ether |
36. |
Hexachlorocyclopentadiene |
65. |
Anthracene |
| 8. |
2-Chlorophenol-d4 (surr.) |
37. |
2,4,6-Trichlorophenol |
66. |
Carbazole |
| 9. |
2-Chlorophenol |
38. |
2,4,5-Trichlorophenol |
67. |
Di-n-butyl phthalate |
| 10. |
1,3-Dichlorobenzene |
39. |
2-Fluorobiphenyl (surr.) |
68. |
Fluoranthene |
| 11. |
1,4-Dichlorobenzene-d4 (I.S.) |
40. |
2-Chloronaphthalene |
69. |
Benzidine |
| 12. |
1,4-Dichlorobenzene |
41. |
2-Nitroaniline |
70. |
Pyrene |
| 13. |
Benzyl alcohol |
42. |
Dimethyl phthalate |
71. |
Terphenyl-d14 (surr.) |
| 14. |
1,2-Dichlorobenzene-d4 (surr.) |
43. |
2,6-Dinitrotoluene |
72. |
3,3’-Dimethylbenzidine |
| 15. |
1,2-Dichlorobenzene |
44. |
Acenaphthylene |
73. |
Butylbenzyl phthalate |
| 16. |
2-Methylphenol |
45. |
3-Nitroaniline |
74. |
3,3’-Dichlorobenzidine |
| 17. |
Bis(2-chloroisopropyl)ether |
46. |
Acenaphthene-d10 (I.S.) |
75. |
Benzo(a)anthracene |
| 18. |
n-Nitroso-di-n-propylamine |
47. |
Acenaphthene |
76. |
Bis(2-ethylhexyl)phthalate |
| 19. |
4-Methylphenol |
48. |
2,4-Dinitrophenol |
77. |
Chrysene-d12 (I.S.) |
| 20. |
Hexachloroethane |
49. |
4-Nitrophenol |
78. |
Chrysene |
| 21. |
Nitrobenzene-d5 (surr.) |
50. |
Dibenzofuran |
79. |
Di-n-octyl phthalate |
| 22. |
Nitrobenzene |
51. |
2,4-Dinitrotoluene |
80. |
Benzo(b)fluoranthene |
| 23. |
Isophorone |
52. |
Diethyl phthalate |
81. |
Benzo(k)fluoranthene |
| 24. |
2-Nitrophenol |
53. |
4-Chlorophenyl phenyl ether |
82. |
Benzo(a)pyrene |
| 25. |
2,4-Dimethylphenol |
54. |
Fluorene |
83. |
Perylene-d12 (I.S.) |
| 26. |
Bis(2-chloroethoxy)methane |
55. |
4-Nitroaniline |
84. |
Indeno(1,2,3-cd)pyrene |
| 27. |
Benzoic acid |
56. |
2-Methyl-4,6-dinitrophenol |
85. |
Dibenzo(a,h)anthracene |
| 28. |
2,4-Dichlorophenol |
57. |
n-Nitrosodiphenylamine |
86. |
Benzo(g,h,i)perylene |
| 29. |
1,2,4-Trichlorobenzene |
58. |
Azobenzene |
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| Conditions |
| Columns: |
SLB-5ms, 20 m x 0.18 mm I.D., 0.18 µm (28564-U) |
| Oven: |
40 °C (0.7 min.), 55 °C/min. to 240 °C, 28 °C/min. to 330 °C (2 min.) |
| Inj.: |
250 °C |
| MSD interface.: |
330 °C |
| Scan range: |
m/z 40-450 |
| Carrier gas: |
helium, 40 cm/sec, constant |
| Injection: |
0.5 µL, 10:1 split |
| Liner: |
2 mm I.D., fast FocusLiner™ inlet liner with taper (2879501-U) |
| Sample: |
80 component semivolatile standard at 50 ppm plus 6 internal standards (at 40 ppm) in methylene chloride |
Additional Information:
Practical considerations, theoretical discussions, a listing of columns in Fast GC dimensions, multiple chromatograms, plus a list of literature for additional reading can be found in the Fast GC Brochure (2.5Mb PDF).
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