Chemistry, 22.04.2020 03:59 jamayeah02

Which of the following descriptions about standard addition and internal standards are NOT correct?

a) Internal standard is useful when the matrix in the unknown is complicated.
b) Standard addition could be a single standard addition or multiple standard additions to an unknown solution.
c) Standard addition is useful when the matrix in the unknown is complicated.
d) Internal standard is used when instrument response varies from run to run.

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