8900 : help with high RSD

Need help with RSDs. I am still learning the ICP-QQQ. I am running water samples in He mode. My RSDs are good for the calibration standards, but when it comes to QCs and sample, they are crazy high (for all elements). The thing is that I am using the same solution as my calibration curve when running QC. Any ideas of what is going on? Thanks!!

  • Typically, high RSDs indicate some issue in the sample introduction area. Please check your pump tubing for wear and change if necessary and also make sure the tension on the tubing is adjusted properly. Spraychamber temp needs to be stable, and nebulizer needs to be free from blockage. Torch injector needs to be clean and free of blockage. 

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