Frequent Questions

EPA Method 200.8-How many calibration solutions and which one(s) should be run after the calibration routine, every ten analyses, and at the end of the sample run for checking instrument performance?

Standard procedure for metal methods is to run a minimum of 3 calibration standards (making sure to bracket the expected sample concentration). Then run the calibration blank and a single mid-level calibration standard immediately following each calibration routine, after every ten analyses and at the end of the sample run.

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