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!!

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