gc columns

Detailed Hydrocarbon Analysis (DHA)Rtx®-DHA Columns (fused silica)(Crossbond® 100% dimethyl polysiloxane—optimized for hydrocarbon analysis)• Columns meet or exceed all ASTM D6730-01 and CAN/CGSB 3.0 No. 14.3-99method guidelines; test report for method D6730 supplied with each column.• Excellent responses and peak symmetry for polar oxygenates.Gasolines are complex mixtures of hundreds of compounds. Information about concentrationsof the individual components is important for evaluating raw materials andfor controlling refinery processes. ASTM D6730-01 outlines a high-resolution GCmethod for detailed hydrocarbon analysis (DHA) of gasolines. Rtx®-DHA columns areideal for DHA methods and easily meet or exceed both ASTM D6730-01 and CanadianGeneral Standards Board CAN/CGSB 3.0 No. 14.3-99 requirements. Every Rtx®-DHAcolumn is tested for retention, efficiency, stationary phase selectivity, and bleed—guaranteeing reproducible column-to-column performance.GC COLUMNS | APPLICATION-SPECIFIC COLUMNSPetroleum & PetrochemicalNEW!Method RecommendedASTMMethodD6729D6730D6733D5501ColumnRtx-DHA-100Rtx-DHA-100 &Rtx-5 DHATuning ColumnRtx-DHA-50Rtx-DHA-150cat. #1014810148&101651014710149Dimensions100m x 0.25mm, 0.50µm100m x 0.25mm,0.50µm w/ precolumn50m x 0.20mm, 0.50µm150m x 0.25mm, 1.0µmID df temp. limits 50-Meter 100-Meter 150-Meter0.20mm 0.50µm -60 to 300/340°C 101470.25mm 0.50µm -60 to 300/340°C 101481.00µm -60 to 300/340°C 10149Rtx®-5 DHA Tuning Column (fused silica)(Crossbond® 5% diphenyl/95% dimethyl polysiloxane—optimized for hydrocarbon analysis)ID df temp. limits 5-Meter0.25mm 1.00µm -60 to 340°C 10165NOTE: Rtx ® -1PONA columns have been renamed as Rtx ® -DHA columns. There are no changes in themanufacturing process or column performance.similar phasesPetrocol DH, DB-Petro, HP-PONA,CP-Sil PONA C8did you know?Using hydrogen instead of helium cancut analysis time in half! Visitwww.restek.com/petro for completeanalytical details.Critical pairs of gasoline components resolved per ASTM specifications on an Rtx®-DHA column.10Excellent resolution and peakshape improve DHA accuracy!1. ethanol2. C53. tert-butanol4. 2-methylbutene-25. 2,3-dimethylbutane6. methyl tert-butyl ether (MTBE)7. C68. 1-methylcyclopentene9. benzene10. cyclohexane11. 3-ethylpentane12. 1-tert-2-dimethylcyclopentane13. C714. 2,2,3-trimethylpentane15. 2,3,3-trimethylpentane16. toluene17. C818. ethylbenzene19. p-xylene20. 2,3-dimethylheptane21. C922. 5-methylnonane23. 1,2-methylethylbenzene24. C1025. C11 (undecane)26. 1,2,3,5-tetramethylbenzene27. naphthalene28. C12 (dodecane)29. 1-methylnaphthalene30. C13 (tridecane)18Column: Rtx ® -DHA, 100m, 0.25mm ID, 0.5µm (cat.# 10148)Resolution1.0µm, connected via Press-Tight ® connector(1-methylcyclopentane/benzene): 1.28(cat.# 20446)27Sample: custom detailed hydrocarbon analysis16(DHA) mix, neat1Inj.:0.01µL, split (split ratio 150:1), 4mm cup4 71121 24 28inlet liner (cat.# 20709)Inj. temp.: 200ºC9 132 1719 3 5 8 12 14 152022 23 25 26 29 30 Carrier gas: helium, constant flowLinear velocity: 28cm/sec. (2.3mL/min.)Oven temp.: 5ºC (hold 15 min.) to 50ºC @ 5ºC/min. (hold6plus Rtx ® -5DHA tuning column, 2.62m, 0.25mm ID,50 min.) to 200ºC @ 8ºC/min. (hold 10 min.)10 20 30 40 50 60 70 80 90 min.Det.: FID @ 250ºCGC_PC00743Circles indicate critical pairs that must be resolved.www.restek.com 75Website : www.chromtech.net.au E-mail : info@chromtech.net.au TelNo : 03 9762 2034 . . . in AUSTRALIA Mar 2011