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Alkylate Standard on Rtx-DHA 50 by Method D5134-13
*Extrapolated from n-C6 and n-C7 or from n-C8 and n-C9
|Column||Rtx-DHA-50, 50 m, 0.20 mm ID, 0.50 µm (cat.# 10147)|
|Sample||ASTM D5134 qualitative reference alkylate standard (DCG Partnership I, LTD)|
|Inj. Vol.:||0.2 µL split (split ratio 200:1)|
|Liner:||Premium 4.0 mm ID Precision inlet liner w/ wool (cat.# 23305.5)|
|Inj. Temp.:||200 °C|
|Oven Temp.:||35 °C (hold 30 min) to 200 °C at 2 °C/min|
|Carrier Gas||He, constant pressure|
|Linear Velocity:||23 cm/sec|
|Detector||FID @ 250 °C|
|Make-up Gas Flow Rate:||30 mL/min|
|Make-up Gas Type:||N2|
|Hydrogen flow:||40 mL/min|
|Air flow:||370 mL/min|
|Instrument||Agilent 7890B GC|
|Notes||Understanding the hydrocarbon components in petroleum samples is useful for sample characterization, determining product quality, planning and modeling of refinery processes, and also for regulatory purposes. ASTM D5134-13 provides the composition of paraffin, naphthenes, and monoaromatic compounds up to n-C9 in petroleum naphthas, reformates, and alkalytes. |
This method is run using a long, narrow-bore column, which has a limited sample loading capacity. Therefore, high split is used and a small sample volume is injected. Restek’s Rtx-DHA-50 column is a good match for this analysis; retention index (RI) data are in agreement with the RI data provided in the method.
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