You again have two alternatives. You can increase the length of the atomization step and the integration time from 5 to 10 seconds. However, a more sensible approach is to increase the atomization temperature. Doing that, you observe the peak shape shown at the left. The peak appears sharper and returns completely to baseline. You could reduce the atomization time to 3 seconds and thus reduce wear on the graphite tube as well as improving the signal-to-noise ratio of your measurement.

You complete the set of measurements and conclude that there is a significant amount of arsenic in the hair. However, there are two quality assurance steps that you must take to be confident that your data will stand up in court. What are they?

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