DEXTech Heat: Automation for Curing Samples

The sample is loaded quantitatively into the system via the needle. The receiver vessel is heated and thus prevents the sample from cooling down and possibly hardening. The sample is rinsed several times (quantitative transfer). The needle is cleaned inside and out during the rinsing processes to prevent contamination.

The sample is also kept warm and thus liquid in the sample loop. Thus, it continuously warms the solvents and thus also the silica column (first column during sample introduction). 

In addition, the sample loop has the same functionality as the DEXTech Pure to add the sample focused onto the silica column at the same time as the cleaning solution of the automated sample transfer. It is continuously flushed with fresh reagent and has been proven to remain contamination-free. By using a sample loop, the sample does not come into contact with either the syringe pump or the piston pump, which enables rapid cleaning of the system.

The columns are clipped into the column tower in a few seconds. After pressing the start button, they are pressed together pressure-tight and the process is started. For your protection, the columns can only be pressed together when the door is closed. You can find the matching clean-up columns here.

The syringe pump is used to load the sample onto the column. The sample does not come into contact with the pump, so that it always remains contamination-free.

The special technique for difficult samples

The DEXTech Heat is similar to the DEXTech Pure, but has the special heating to keep curing samples liquid.
The following are heated: the sample feed, the sample loop and all tubing through which the sample flows. Due to the reactions on the silica column (first column during sample loading), this becomes warm during the process and does not require additional heating. The heating can be adjusted in a zone-controlled manner.

All tubing connections are permanently installed and do not need to be conditioned or replaced for each sample.

Via the touch display the user is guided through an intuitive operating program to start recommended and tested default methods for different approaches (e.g. dioxins and PCB or PCB only etc.) around methods stored in the system. Method development by the user is not required, yet programming of own methods remains possible.