Sample Clean-up with DEXTech Pure

Dioxins and PCB

The Solution for Purified Fractions


DEXTech Pure offers the unique clean-up of PCBs and dioxins in one “pure” fraction each. This is the perfect solution for customers interested especially in measuring PCBs and dioxins separately within one GC-MS run each or also for customers interested only in PCB analysis, as it is often relevant in the environmental sector. In this case DEXTech Pure offers a 2-column-method reducing the run time.

DEXTech Pure looks the same as DEXTech Plus, but is modified in terms of fluidics and methods.

DEXTech Pure thus enables the fully separation of PCBs and dioxins based on aluminium oxide. Besides this new method, the conventional clean-up method, as it is established on DEXTech Plus already on aluminium oxide column in its fast and economic method, can also be used.

3-Column Set-up with Patented Locking System

The DEXTech Pure system is designed with a 3-column set-up, like DEXTech Plus. Depending on the individual requirements, matrix or desired method, the user can load the DEXTech Pure with different set-ups, simply insert the respective columns - "just click it". No screw connections, no tools, no other manual steps.
From sample to sample - fast, flexible, effortless.

  • Acidic silica gel column: depending on the sample SMART column (samples of up to 1,5 g fat) or Universal column (sample of up to 5 g fat)
    Easy and fast change between Universal and SMART-columns by fitting an adapter.
  • Aluminium oxide column 
  • Carbon column: reusable
    Advantage: Cost saving for "pure" PCB analysis, because the carbon column is not needed and replaced by a dummy column.


More details about LCTech`s columns for PCB- and dioxin analysis

The Fractions

DEXTech Pure is delivered with two predefined methods. It allows to connect four solvent bottles, if the customers want to run both methods without changing the bottles.

Alox Pure Method

The Alox Pure method separates PCBs from dioxins and collects each in one fraction. This method is especially advisable for customers e.g. in the environmental sector, where often PCBs are analysed. In this case the method comes along with quite some advantages: The processing time per sample is faster, the column equipment is cheaper because no carbon column is required, and the solvent consumption is reduced. Altogether, this results in much lower cost per sample and an environmental friendly technology.

Alox Plus Method

The conventional method, as it is established on the DEXTech Plus already in routine laboratories: Mono-ortho-PCBs together with ndl-PCBs and PBDEs are collected in the first fraction, non-ortho PCBs and PCDD/Fs are collected separately in the second fraction.

Cross-contamination reliably avoided

Flexible Parameterisation

Besides the standard methods, you have the freedom to configure the DEXTech Pure system according to your requirements adapted for each sample. The user can freely parameterise a method and save it in the system. Up to 30 methods can be opened and modified at any time and then be saved again under a different name.

DEXTech Pure: Sample Preparation Done by Specialists

DEXTech Pure provides the established benefits of DEXTech Plus like easy handling, automated sample loading, a wide variety of safety features and good results, already proven by numerous private and governmental institutes.

With the system you can prepare all kind of

  • environmental samples, such as soil, sewage sludge, sediments,
  • food and feed samples, such as fish, meat, and fish oil, eggs, vegetable oils and animal feed mixtures,
  • biological matrices, such as blood

fast, easy, and reliable.

Due to exchangeable columns, permanent rinsing of all parts, which were in contact with the sample, and the fact, that sample and syringe pump have no contact, cross contamination is reliably excluded.