DLW (Dynamic Load and Wash)


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DLW (Dynamic Load and Wash) for Fast and Clean LC/MS Loading
Application Type
  Washing LC Valve
Application ID
  DLW (Dynamic Load and Wash) for Fast and Clean LC/MS Loading


DLW (Dynamic Load and Wash) for Fast and Clean LC/MS Loading

  • The DLW,Dynamic Load and Wash, is designed for today’s most sensitive MS instruments this completely new injection and wash concept gives Near Zero Carryover and can drastically reduced cycle times. The linked combination of the two steps which are usually separate - minimizes cycle time and carry over. The DLW,Dynamic Load and Wash, is designed to be used on the PAL[1] line of robots.

Main Features of DLW

  • Near Zero Carryover - Typically less than 0.003%
  • Reduced wash cycling times- Typical Clean Cycle time less that 1 minute (Fast Cycle)
  • Holding loop for effective rinsing of the complete sample path
  • Inert sampling path - No contact with syringe, only PEEK tubing and stainless steel
  • Reproducible - < 1% RSD
  • Minimum sample contact - wetted parts are stainless steel and PEEK
  • Integrated pumps for active wash solvent delivery selectable wash time for organic and aqueous solvents
  • Two Solvent Wash - Complete cleaning from the opposite direction of sampling
  • Spring loaded syringe needle positioning in needle guide – no dead volume
  • Flexible - HPLC and UHPLC applications
  • Robust - Spring loaded syringe needle positioning
  • Can be run from Analyst 1.5 as standard cycles without additional software
  • Upgradable - Existing PAL systems can be upgraded

The features include:

  • A new state-of-the-art new electronics board
  • Dynamic Load and Wash (DLW) concept
  • Clean and efficient removal of carryover in the entire flow path

This results in:

  • Keeping sample away from the syringe, plus fast, effective washing of all wetted path
  • Near-zero carryover results from run to run
  • Larger memory capacity for more objects
  • Faster basic motor speeds
  • Controls additional solenoid valves and other accessories
  • Externally exchangeable fuse, which protects electronics
  • Ethernet as well as RS 232 interface
  • New firmware 4.x not available for old boards

CTC Analytics, the manufacturer of the PAL sampling and high throughput systems, has announced the release of the Dynamic Load and Wash (DLW). This upgrade has undergone rigorous customer testing and has proven to be extremely effective in removing carryover. With DLW option, the sample is no longer in contact with the syringe but it is aspirated into a holding loop located in front of the syringe. The syringe acts only as an aspirating and dispensing device and provides the excellent reproducibility seen in standard syringe injection systems. After the injection on tho the valve the whole sample path including the valve and the needle is washed with up to 2 different solvents. Micro pumps quickly and effectively deliver the required quantity of solvent. All parts which have been in contact with the sample are completely clean. As a result, near-zero carryover is achieved. The DLW is offered in an upgrade kit from LEAP as well as included with all new HTC-xt and HTS-xt PALs.

LEAP is proud to introduce the newest PAL's the HTC-xt
LEAP is proud to introduce the newest PAL's the HTS-xt

Who may benefit:

  • High throughput users- Fast wash cycles
  • High Sensitivity Detection users
  • Existing users of PAL – xt Upgrade Kit is available from LEAP
  • New users – Looking for a Faster Cleaner Autosampler

Animation of Fast Cycle for DLW for PAL

PRINT Brochure

PDF Brochure of DLW for CTC PAL
PDF of DLW Comparison of Cycles
PDF of DLW Data


Video Presentation of DLW Webinar Part 1 of 3
Video Presentation of DLW Webinar Part 2 of 3
Video Presentation of DLW Webinar Part 3 of 3
LEAP's PAL Application Videos on YouTube


Accessories for the PAL

Other Accessories for PAL Robots

 ↳ leaptec.com  ↳ leapwiki.com

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.

Contact LEAP

Contact LEAP

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

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