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- Posts: 1
- Joined: Mon Mar 31, 2025 4:17 pm
- Location: united states
I am running method EEA 521.1 for nitrosamines and am having trouble with the internal standard not being consistent through the run. I have a directly spiked calibration and check standards that are all within range but when I extract a sample the response will go above the required 30 percent window. Has anyone had these issues?