Checking for a Blocked ICP-OES Nebulizer

This Information Applies To: Agilent 5000 Series ICP-OES

Issue:

Blocked nebulizers are the source of many instrument performance issues including loss of sensitivity and poor precision, especially when running organics, high solids, or high salt concentration solutions. The ICP-OES backpressure Nebulizer test verifies nebulizer performance. Run this test if you notice no mist in the spray chamber, have low sensitivity during analysis, or high % RSDs on your replicates. Blockages and partial blockages may not be identified ny visual identification. 

Steps to follow:

1. Turn on the external exhaust and then the ICP-OES.

2. Open ICP Expert software.

3. Install the nebulizer, spray chamber, and torch and ensure that the gas supply is connected and turned on. 

   Tips: Perform this test when the nebulizer is new and compare to the results when testing for a blockage.

4. On the instrument toolbar, click Dashboard > Nebulizer Select drop-down menu >  and select the appropriate nebulizer or Other if nebulizer is not available in the list.

5. Click Start to run the test.

6.  Once the test is finished, click Status > Tests to view the results.

7. A High backpressure result indicates a partial or fully blocked nebulizer or torch injector tube. To correct:

   1. Replace the nebulizer with a brand new one (preferably) or clean one.

   2. Clean the nebulizer.

   3. Clean the torch injector tube.

8. A Low backpressure result indicates a leak on the nebulizer supply line, the internal capillary of the nebulizer is cracked or broken, or the nebulizer is not installed correctly. To correct:

   1. Check the connections and reinstall the nebulizer.

   2. Check the nebulizer supply lines for cracks.  

Learn how to effectively troubleshoot your Agilent ICP-OES: ICPOES-5110-1270e - Agilent 5110 ICP-OES Maintenance and Troubleshooting  e-learning course on Agilent University