Large Volume Dispensing
From LEAP
| Large Volume Dispensing |
| Application Type | |
| SPECIAL | |
| Application ID | |
| Description | |
| Accurate dispensing of solvents at high flow rates |
www.leapwiki.com
Contents |
Overview
There are three options on the PAL for delivery of large volumes of solvent. Choice will depend on the requirements for delivery rate, delivery volume and accuracy. In each case these pumps can dispense liquid either through PAL side-port syringe, or using the LEAP "Dispense Tool" accessory. The advantage of the latter is that it permits larger flow rates and includes a venting channel to avoid over pressurization in the case of filling sealed vessels.
Common Uses
- Dispense liquid prior sample injection and combines the "add liquid" and "inject" steps without user intervention or syringe change.
Typical applications
- Dilutions
- Derivatisations
- Sample spiking
- Standard additions
Dilutor Accessory
Syringe pump volume range of 0.25 ml to 2.5ml delivery per 2.5 ml syringe cycle. (Optional dilutor syringe 1ml or 5 ml)
Flow Rate Range: 10μl/min - 300μl/min
Wetted parts: All liquids compatible with borosilicate glass, PTFE, Kel-F, FEP
Notes
- Requires the addition of a custom macro or cycle for dispensing/diluting applications
- Can be used with any of the PAL side port syringes or with the DISPENSE Tool
- Is not supported by the on board PAL cycles
- Requires an open AUX Port on the PAL
- Requires PAL firmware 2.3 or higher
 Dilutor with DISPTool |
 Dilutor on PAL |
Mini Pump Series Accessory
The Mini Pump liquid handling pump is a syringe-free pump capable of delivering a bidirectional flow to six orders of magnitude. The Mini Pump is a positive displacement pump, which means that it is self-priming and tolerant of any gas which may find its way into the fluid lines. Since there is no separate fill cycle, the pump can be operated continuously, and volumetric capacity is limited only by time.
Notes
- Requires LEAP Shell Software for control.
- Can be used with any of the PAL side port syringes or with the DISPENSE Tool
- Is not supported by the onboard PAL cycles
 Mini Pump |
Pump on PAL |
Solvent Delivery System (SDS) Accessory
Main Features
- 4 Solvents can be dispensed
- 9 Program Steps allow solvents to be added in any order
- Software Interface SDS Launchpad for loading dispense routines
- Save/Load Methods to PC drive
- Easy Verification of Downloaded Method via the “Dashboard” feature in SDS Launchpad
- Contact closure triggers device to run stored dispense routine
- Significantly extends the PAL dispenseing volume range.
- Can be used with any PAL side port syringe or LEAP DISPENSE Tool
- Compatible with all PAL Drivers
 Solvent Delivery Module |
 SDS on PAL |
Performance Specifications
- Maximum flowrate 6mL/min in increments of 0.1mL/min
- Flowrate accuracy ± 10%
- Maximum dispensed volume 999mL
- Volumetric accuracy ± 5%
- Maximum pressure 50PSIG
- Typical wash time for 2 solvents (1mL each) @ 6mL/min is 45 seconds
Requirements/Limitations
- Lower dispense speeds needed for more viscous solvents, e.g., i-Propanol @ 3-4mL/min
- Use of Polypropylene compatible solvents
Screenshots
 Launch Pad Main Screen |
 Launch Pad Actions Screen |
 Launch Pad Load Method Screen |
 Launch Pad Log Screen |
Side Port Syringe Accessory
Main Features
- Can be used to dispense liquid prior sample injection
- Combines the "add liquid" and "inject" steps without user intervention or syringe change
- Variety of sizes available: 20µl or 80µl for LC applications and 20µl or 80µl for GC applications
 Side Port Syringe in action |
 Side Port on PAL |
Side Port on PAL |
DISPTool Accessory
Main Features
- Can be used to dispense bulk liquids without using the injection syringe
- The tool is magnetically picked up by the PAL and moved to the vial or plate only when needed
- Able to pierce a septa with an adjustable needle penetration
- 19ga needle with built in vent
- May allow single rail to have functionality of dual rail system
- Can be used with the Dilutor, Mini Pump, or LEAP SDS
Requirements/Limitations
- Requires some additional rail space for DISPTool parking location
- Requires custom firmware
|
 |
 |
Video
Image:DISPTool.wmv Uses Windows Media Player to view
Dispense Tool movement Uses Windows Media Player to view
Dispense tool in action on youtube [1]
PRINT Function for Page
www.leapwiki.com
Contact LEAP
For additional information about this technique please contact LEAP Technologies for detailed information
