The core of the second-hand liquid phase liquid quality system is the 2695 separation unit and its integrated solvent and sample management functions, ensuring consistent performance and high reproducibility between systems.
Advantages of Agilent liquid chromatography products:
The core of the system is the 2695 separation unit and its integrated solvent and sample management functions, ensuring consistent performance and high reproducibility between systems.
Solvent management
The solvent management system of this unit is designed to degas and mix the four chromatographic solvents in precise proportions without pulsation, ensuring stable solvent transport; It has the following characteristics:
The serial flow path with only two inlet valves reduces complexity and downtime due to malfunctions
Vacuum degassing adopts effective second-generation polymer membrane technology
Accurate low-pressure quaternary solvent mixing (first out), providing reproducible gradients throughout the entire flow rate range
No need to use pulse dampers, the independently driven plunger generates a non pulsating solvent flow
Fixed hysteresis volume (not changing with system backpressure) to obtain consistent and predictable chromatography
Programmable flow rate range covers two orders of magnitude (from 50 µ L/min to 5mL/min) without the need for hardware replacement
Routine maintenance of plungers, gaskets, and gasket cleaning devices can be performed without the need for tools
Automatic cleaning of plunger sealing gasket
Sample Management
Up to 120 industrial standard sample bottles can be placed on each of the five sample trays of 2695. Quick sample sequence setup - whether it's a single sample or a sample sequence from multiple methods by different analysts.
Reproducible injection volumes ranging from 1 to hundreds of microliters, compatible with LC chromatography columns of any analytical scale
The injection volume is variable, so there is no need to replace the quantitative ring to adapt to the analysis method
Cross contamination is managed through programmable needle washing cycles and effective needle washing solutions (no need to place needle washing solution injection bottles)
The height of the injection needle can be programmed to accommodate sample bottles of different sizes, while taking into account the thickness of the bottle bottom
The sampling rate of the syringe can be programmed to accommodate samples/solvents of different viscosities
Five independent sample trays allow users to prepare the next sequence of samples on another tray while running samples on one tray. New samples/sample trays can be added to the system without interfering with the running sample sequence
Sampling program compatible with automated reference peak addition or automated pre column derivative program
It is easy to remove the low-level needle washing port or replace the syringe without the need for tools, making it convenient for daily maintenance