these results can be obtained in less experienced routine lab environments, without requiring large volumes of liquid nitrogen or carbon dioxide to operate. By using pre- defined automated software actions, the interaction with the GCxGC software is reduced to a minimum. Additionally, instrument performance is easily validated with dedicated gravimetric reference samples. This makes routine analysis of middle distillate samples by GCxGC not only possible but practical.

Figure 6. GCxGC aromatic content versus EN 12916:2016 (confidence levels based on Reproducibility calculation EN 12916:2016

The GCxGC application presented in this article provides petroleum refineries with an easy to use analytical tool, which was previously only available to research institutions.

Achieve High Performance Preparative Liquid Chromatography Simply, without Compromised

The ACCQPrep HP150 system from Teledyne ISCO is a simplified solution to the unnecessary complexity found in many of the HPLC systems on the market today. It uses our PeakTrak® in mind.

intuitive software and was developed with the ease of a Flash system

It does not follow the traditional path of an analytical system, but rather has been designed to be initiative and easy to use. This preparative chromatography system supports flow rates from 1 to 150 mL/min and operation pressures up to 6000 psi without the need to change pump heads. It also features a Focus Gradient Generator which can be prompted to run a preset scouting gradient, a target peak for purification, and will automatically program the focused gradient.

Save time and money with the ACCQPrep HP150 Focused Gradient Generator

Part of the ACCQPrep package, the Focused Gradient Generator, allows users to select the peak you want to purify – and the ACCQPrep automatically generates a focused gradient centered on the selected peak. It typically elutes in less than ten minutes and increases resolution and loading.

Small Footprint, Big Performance

So much science packed in such a small machine. The ACCQPrep HP150 System eliminates the need for an additional PC to control the separation and purification processes.

With PeakTrak software for mass directed fractionation, ACCQPrep simplifies the science with the touch of a button. Simply run a preset scouting gradient, select the target peak for purification and the focused gradient is automatically programmed into the system!

For more information or to request a quote, contact us today. More information online:

CPC: A cost-effective alternative to HPLC for Natural Product Purification

Laboratories purifying natural compounds are fast adopting Centrifugal Partition Chromatography (CPC) as a highly efficient alternative to traditional HPLC technologies. With its larger injection volumes, faster flow rates, combined with high yields and purity, instruments like Gilson’s CPC systems provide a scalable, efficient, and cost-effective solution for purification and extraction research.

Because CPC uses both liquid stationary and mobile phases, this technique can handle complex and heavily contaminated starting extracts such as extracts from biological sources, such as plant extracts, algae, fermentation broths etc. It also offers significant costs savings in comparison to expensive traditional columns or cartridge replacement used by preparative HPLC and flash chromatography methods. CPC also uses five times less solvent and eliminates silica recycling costs.

Most importantly, CPC can accommodate faster flow rates and high sample injection capacities from mg to kg, improving the productivity of the separation, particularly in scenarios where multiple runs are required.

More information online:

Detailed compositional information of middle distillate streams is a key parameter in modelling refinery processes or predicting final product properties. Having the option to quantify the composition of these streams in far greater detail can enable improved operational efficiency and help to ensure final products meet the highest quality standards.


1. EN12916 https://standards.cen. eu/dyn/www/f?p=204:110:0::::FSP_ PROJECT:63144&cs=124498A54C8C5 BE30FEB873BCFC30A7EC

2. N14078 https://standards.cen. eu/dyn/www/f?p=204:110:0::::FSP_ PROJECT:38244&cs=1CB0E2913B07669A F00EEB2A68E9424D3

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