Videos

Videos of various DPX methods are available below that show how to use the DPX products. Simply click on the method of interest to watch the video.

A protein crashed whole blood sample (0.2 mL with 0.3 mL acetonitrile) is aspirated and mixed inside the DPX-WAX tip. After approximately 30 seconds, a clean solution is dispensed into a vial and is ready for analysis.

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DPX Labs is introducing a DPX Extractor that permits the simultaneous extraction of 24 samples. This semi-autosampler uses no electricity and performs the extractions with gas pressure (such as compressed air). There is little to no maintenance required and it is easy to operate.

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Using a multi-channel pipettor, you can remove ion suppression effects from 8 acetonitrile protein precipitated blood samples (serum, plasma or whole blood) in just seconds.

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An acetonitrile solution of spinach was prepared according to the QuEChERS procedure by shaking spinach with acetonitrile in a 1:1 ratio (10 g spinach with 10 mL acetonitrile). Then 1 mL of the acetonitrile solution was dispensed into 2 test tubes, one that is untreated and the other which is "cleaned up" by aspirating and dispensing the solution in and out of the DPX-Qg tip 3 times. Note the removal of the green pigment by the DPX-Qg tip, which contains "high quality" graphitized carbon black (GCB). This is a very new GCB material that is of the highest quality for removing plant pigment matrices, which may have deleterious effects on the GC inlet system.

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In this video, a DPX extraction of an aqueous mixture of 2 different dyes is performed. One dye is acidic (blue), and the other dye is nonpolar (red). The first step of the extraction is a conditioning step using methanol (middle test tube). After the methanol is dispensed, the sample solution (first test tube on the left) is drawn into the DPX tip and mixed with air. After equilibration (30 s), the solution is expelled.

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This video demonstrates a basic chromatography experiment that can be performed readily in most chemistry labs. The lab involves separation of the 2 dyes that make up the purple color in "grape koolaid".

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In this video, a unique liquid-liquid solid phase extraction is shown. The first step is a rapid "optional" conditioning step using methanol. An aqueous sample solution (2nd test tube) containing approximately 25% acetone and a high concentration of NaCl is mixed with the solid phase sorbent.

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This video shows a rapid "cleanup" method using a DPX-WAX (weak anion exchange sorbent) tip. An acetonitrile solution of protein precipitated whole blood is rapidly processed in 60 seconds by aspirating the solution into the DPX-WAX tip, mixing the solution with the sorbent by aspirating air, and then dispensing the "clean" solution back into the tube. Note the comparison of with and without "cleanup" at the end of the video.

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Rapid cleanup of milk solution to remove proteins and sugars is shown in this video. A small volume of whole milk (100 uL) is pre-mixed with 400 uL 50% acetonitrile and water, and this solution is aspirated and mixed inside the DPX-WAX tip.

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Rapid cleanup of a spinach solution is performed to remove chlorophyll from the extract. A solution of spinach extracted from acetonitrile (10 g spinach to 10 g acetonitrile) is aspirated and mixed inside the DPX-Qg tip.

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NEWS

Cleanup tips for urine applications are now commercially available.

Please contact us to find out more information.

Coming Soon

Using a multi-channel pipettor, you can remove ion suppression effects from 8 acetonitrile protein precipitated blood samples (serum, plasma or whole blood) in just seconds.

See Video