Multiplexing LC injections


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This Cycle Composer application was used to increase sample throughput by taking advantage of front[1] and/or back-cut[2] time to load the next sample in the sequence early.

It requires that the “period of interest” in the chromatography is significantly shorter than the overall chromatographic run-time. There are two columns which are running in “staggered” mode, where samples are pre-loaded onto the other channel while the previous channel is still in acquisition. There is no pre-column, the analytical columns on each stream are regenerated[3] by the analytical gradient programs. Samples are processed in pairs, the application does NOT integrate with data systems[4], but contact closures are used to maintain synchronization with the detector. There are two analytical columns, one for each stream. Sample injection occurs onto each stream in a staggered fashion[5] and is offset by the acquisition time. Optimum sample throughput is achieved by sample injection onto column 1 during the front cut and/or column equilibration of column 2.

Project Ref: H1109

Videos of PAL

LEAP's PAL Application Videos on YouTube

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LEAP strives to find total solutions for analytical lab automation by automating analytical processes for small and large molecules in extracted liquids, solids, and recently in human, animal and plant tissues. We provide the precise robotics and efficient sample prep required by modern measurement techniques such as MALDITOF mass spectroscopy. Our newest specialty customization of CTC Analytics’ PAL features small workstations that can perform complex liquid handling tasks including HPLC-Purification, SPE, filtration, weighing, heating and stirring. They can be configured as stand alone units or integrated for “just in time” sample prep for LC-MS or GC-MS analysis.
LEAP provides automated workstation instrumentation solutions based on the LEAP CTC PAL X, Y, Z syringe only autosampler robot from LEAP Technologies. This extremely flexible, precise, and adaptable liquid handling robotic platform is available in a variety of lengths and options depending on the requirements of your sample preparation and injections for your UHPLC, LC or GC chromatography.LEAP offers full support and service for the PAL platform in addition to being able to write custom macros, cycles, and scheduling to your applications. Please contact LEAP Technologies on how we can help you get maximized throughput with flexible pipetting automation solutions.

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Contact LEAP

For additional information about LEAP and the PAL Platform, please contact LEAP Technologies.

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