Introduction
Instruction Manual, Sep-18
4
1. Pick up DBS cards (Robotic-module)
Highly reliable robotic are used for handling of DBS cards. The cards (type: ID Biological
Systems or Whatman) are stored in up to 5 racks each with a capacity of 100 cards. The
robotic include a newly developed griping tool specifically adapted to DBS cards. The
gripping tool picks up cards and moves them to all of the subsequent processes in the
corresponding modules.
2. Optical card recognition (OCR-module)
A digital camera with adapted sensor determines the cards properties: spot number and
position, checkbox status and barcode information. The DBS card is only accepted for
analysis if all parameters comply. CAMAG has incorporated its knowhow of more than a
decade of optical HPTLC image analysis to build this precise and reliable OCR-module.
3. Internal standard application (ISA-module)
Variability in the absolute response of LC-MS systems can now be corrected by applying
an internal standard solution onto DBS cards directly before the analysis. This also allows
correcting for extraction efficiencies. The application of the internal standard just before
the extraction of the DBS card is much easier from a logistic point of view than adding the
internal standard before the blood sample is spotted onto the DBS card. CAMAG has
been manufacturing high precision application instruments for HPTLC for a long time and
has used this experience to build the ISA-module.
4. Extraction of the DBS card (Extraction-module)
The precise extraction process involves a sample loop which is independent from the LC-
MS system, thus allowing for high flexibility for differ fluid configurations. Whether you
are using a standard sample loop of 20µL or want to flush 200µL of solvent through a
trapping column – the system can be configured according to your needs, just like your
usual LC-MS system.
5. Wash station (extraction –module)
Requirements regarding carry-over limits are a challenge, particularly for direct sample
loop filling without a trapping column. Therefore a designated wash station cleans all
parts that are in contact with the DBS cards and additionally flushes the entire tubing to
avoid any carry-over. Using this system, independent user tests confirm that carry-over is
not an issue.
6. Replace DBS cards
Finally, the robotic gripping tool puts the cards back into their original position in the rack.
Depending on user requirements there are additional options, e.g. verification of DBS
cards for proper extraction or further tests depending on future requirements.
Summary of Contents for DBS-MS 500
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