Varian CP-8400 automatic sample changer: high-precision automation for gas chromatography
The Varian CP-8400 automatic sample changer has been designed to meet the growing need for automation and reliability in analytical chemistry laboratories. Designed to work in tandem with the CP-3800 gas chromatograph, this system stands out for its robustness, precision and ability to perform a variety of injections without interruption. Capable of handling up to 100 vials simultaneously, it ensures a sustained work rate while maintaining a high level of reproducibility.
Designed to maximise productivity without compromising analysis quality, the CP-8400 stands out for its compatibility with a wide range of syringe volumes and vial sizes. It can inject into one or two injectors, from the same vial or two different vials, while maintaining perfect synchronisation with the chromatograph. This flexibility allows operators to manage complex injection sequences, including priority samples, without disrupting work routines.
One of the great advantages of the CP-8400 is the variety of injection modes available: standard (split/splitless or on-column), viscous, volatile, neat (pure) and even SPME (solid phase extraction), thanks to a dedicated hardware module. Each mode has been rigorously calibrated by Varian to deliver optimal performance depending on the nature of the solvent or compound being analysed. A "User Defined" mode provides access to all parameters for fine-tuning the injection conditions.
The installation and calibration of the CP-8400 have been designed to be simple and secure. Thanks to its calibration tool, users can precisely adjust the positions of the vials and injectors to ensure perfect injections every cycle. Once installed, the system can be fully controlled from the CP-3800 interface, allowing the configuration of unique methods or automated sequences including cleaning, injection delays, multiple volumes, etc.
The system is also compatible with Prep-Ahead mode, allowing the next injection to be prepared while the previous analysis is in progress. This intelligent mode significantly reduces the waiting time between analyses and increases the overall throughput of the laboratory. Finally, the priority sample function allows an urgent sample to be processed at any time without interrupting the main programme.
With the CP-8400, Varian offers a reliable, adaptable and high-performance tool that simplifies sample injection while ensuring a high level of accuracy. It is the ideal equipment for laboratories that want to automate their analyses while maintaining total control over every parameter.
