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After completing this activity, students will be able to:

  1. explain the differences between external standard and standard addition calibration.
  2. identify when the use of an internal standard is necessary.
  3. discuss the merits and drawbacks of each type of calibration.
  4. calculate the concentration of an analyte given raw data using any combination of calibration methods (external standard, standard addition, and/or internal standard).
  5. develop an appropriate calibration method when faced with a real world analytical problem.

Rebecca Hunter, The College of New Jersey (

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