Advanced Valve System (AVS 4)
The following information is provided on this page:
For safety information and to prepare the accessory for installation, please see the instructions that came with the accessory.
About the AVS 4 Accessory
For safety information and to prepare the accessory for installation, please see the instructions that came with the accessory.
The AVS 4 is a 4-port switching valve that reduces analysis time by way of a more efficient sample introduction and rinsing system. The switching valve is installed into the Agilent ICP-OES and is plumbed between the nebulizer and the peristaltic pump of the spectrometer. Sample flow is only directed to the sample introduction system during stabilization and read times. At the end of the sample analysis the flow is immediately switched to waste while the sample introduction system is supplied with rinse solution during the rinse time. Rinse solution continues to be supplied to the sample introduction system during the uptake of the next sample.
Agilent ICP-OES with the AVS 4 installed
Installation instructions
See the installation instructions that came with the switching valve.
The following maintenance instructions are here:
Using the AVS 4
To create and run a method using the AVS 4:
- Open ICP Expert.
- Create a new worksheet (or open an existing one).
- On the Configuration page enable the AVS 4.
- If any of the switching valve components such as tubing or rotor have been changed, run the Advanced Valve System test using a blank and the wavelength calibration solution to confirm that the %RSD is less than 2%.
- If it is not less than 2% RSD, troubleshoot the instrument precision.
- Optimize your analysis speed.
- Follow the steps on the 'Developing a Method' page, making sure to enter the optimized parameters for the AVS 4 on the Conditions page.
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Access the Instrument window to manually control the AVS 4, if needed. |
Valve Diagrams
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| Uptake position | Inject position |
The black arrows show the flow direction.
Where:
- Port 1 - Sample inlet from peristaltic pump
- Port 2 - To nebulizer
- Port 3 - Rinse inlet from peristaltic pump
- Port 4 - To waste
See also: