How to Install the ICP-MS Torch, Bonnet, and Platinum Shield Plate

Answer

This Information Applies To: Agilent ICP-MS systems (7700/7800/7850/7900/8800/8900)

Issue

The torch, bonnet, and platinum shield plate must be installed after performing maintenance, or replacing with new components. 

Items Required

• Standard Torch, quartz, 2.5 mm id - not suitable for samples containing hydrofluoric acid. (p/n G3280-80053)
  see the Agilent Spectroscopy Supplies Catalog if you use a non-standard torch
• Bonnet (p/n G1833-65421)
• Platinum Shield Plate (p/n G1833-65419)

Steps to Follow

1. Install the platinum shield plate over the end of the torch, ensuring the alignment hole in the shield fits over the torch projection (Figure 1).

   
   
   Figure 1. Shield plate installed on torch
   
   

2. Slide the bonnet over the platinum shield plate with the lip facing the base of the torch. The lip of the bonnet will rest against the shield plate torch projection (Figure 2).
   

   
   
   Figure 2. Bonnet installed on shield plate and torch
   
   

3. Guide the end of the torch through the work coil being careful to not drop the bonnet, and ensure the torch alignment projection fits into the torch stand groove (Figure 3).
   

   
   
   Figure 3. Torch installed on torch stand
   
   

4. Lock the torch in place with the torch stand clip (Figure 4).
   

   
   
   Figure 4. Torch stand clip latched
   
   

5. Connect the plasma and auxiliary gas lines to the torch and then tighten the connectors by hand until finger tight (Figure 5). 
   

   
   
   Figure 5. Gas lines connected and tightened
   
   

6. Slide the spray chamber block to the right side, to connect the torch and connection tube and tighten the thumbscrew on the bottom of the spray chamber block (Figure 6).
   

   
   
   Figure 6. Spray chamber block slid to the right and thumb screw tightened
   
   

7. Install the clamp that connects that torch and connection tube (Figure 7).
   

   
   
   Figure 7. Torch and transfer tube clamped
   
   

8. Install the torch box cover and secure the torch box catch clip (Figure 8).
   

   
   
   Figure 8. Torch box cover installed and latched
   
   

9. Close the ICP-MS small cover (Figure 9).
   

   
   
   Figure 9. Small cover closed
   
   

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