CHROMATOGRAPHY 39


Raptor LC columns provide results in minutes – not hours – for increased sample throughput


A Raptor ARC-18 column enables a fast 8.5-minute analysis – an eight-fold reduction in analysis time with a single column


using two columns connected in series. Even with two columns and a long analysis time, methyl ethyl ketone and butyraldehyde coelute in this analysis. To report these two compounds, another 30-minute chromatographic analysis with a diff erent column is needed. However, this second analysis cannot be used to report all compounds due to the coelution of formaldehyde


with a non-carbonyl compound. T is same list of CARB 1004 aldehyde/ketone DNPH derivatives can be fully resolved by the second Restek method shown above using a Raptor ARC-18 column in a fast 8.5-minute analysis – an eight- fold reduction in analysis time with a single column. Both of these methods from Restek are compatible with


conventional 400 bar HPLC systems and benefi t from the larger, low-clog frit used in Raptor column hardware. Using either Raptor LC column – along with Restek’s airborne carbonyl reference standards – assures fast, accurate analysis of aldehydes and ketones in air and off ers an opportunity for improved sample throughput compared to typical columns and methods.


For more information ✔ at www.scientistlive.com/eurolab


Shun-Hsin Liang is with Restek. www.restek.com


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For more information ✔ at www.scientistlive.com/eurolab


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