Large Volume Dispensing
From LEAP
| Large Volume Dispensing |
| Application Type | |
| SPECIAL | |
| Application ID | |
| Description | |
| Accurate Pumping of solvents at high flow rates using the Valco M50 pump and Dispense Tool |
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
- CTC Dilutor
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 to run the appropriate macro
- Limited to either a 20 or 80uL sample syringe size with a side port connection
- Requires an open AUX Port on the PAL
- Requires PAL firmware 2.3 or higher
- It can not be used on standalone PAL instruments
 CTC Dilutor with DISPTool |
 CTC Dilutor on PAL |
- Valco M Series pumps
The patented* Cheminert® M Series liquid handling pump is a syringe-free pump capable of delivering a bidirectional flow to six orders of magnitude. The M Series 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.
 Vici Valco Pump |
- Solvent Delivery System (SDS)
Selectable 4 solvent delivery.
 Solvent Delivery Module |
 SDS on PAL |
Useful links:
Valco website - description of the pump: [1]
