Description
Retaining Ring – AT7704
P/N: AT7704
Cross Reference(s)
Agilent: G3280-20504
Instrument Compatibility:
Agilent 7700 / 7800 / 7850 /7900 / 8800 / 8900
Detail:
Retaining Ring for Sampler Cone
A retaining ring for the sampler cone secures the cone with the interface in ICP-MS, ensuring a proper seal and preventing leaks. It helps maintain the vacuum in the interface region, which is crucial for efficient ion transport from the plasma to the mass spectrometer.
The retaining ring for the sampler cone is typically hand-tightened after the skimmer cone is installed. Afterward, its proper installation is confirmed by observing stable plasma transfer during analysis.
Why is a Retaining Ring Needed on the Sampler Cone in ICP-MS?
The retaining ring’s primary function is to hold the sampler cone securely against the interface, preventing air from leaking into the vacuum system. A good seal is essential. As a result, it will maintain the vacuum pressure in the interface. This is necessary for efficient ion transmission.
What is Important about the Location and Installation of the Retaining Ring?
After installing the skimmer cone, add the retaining ring to the cone. Do so without applying excessive force. Keep in mind that the retaining ring should never be too tight.
Proper installation of the retaining ring ensures that the interface will function correctly. That is because it allows the plasma to ignite and transfer to the analysis mode seamlessly. If the plasma doesn’t transfer properly or the interface pressure is not as expected, it may indicate an issue with the retaining ring or the overall cone installation.
Sampler cones of nickel or platinum can withstand the harsh conditions of the ICP plasma, including high temperatures and corrosive samples. Likewise, the retaining ring may be made of a similar material or another metal that provides a secure and leak-proof connection.
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