Classify the statements based on whether they describe the method of standard addition, internal standards, or external standards. You are currently in a sorting module. 1. It is the method of choice when the matrix of the sample may affect the signal.
2. Known quantities of the analyse are added to the unknown.
3. A known amount of a standard, different from the analyte, is added to the unknown.
4. It consists of a series of standard analyte solutions separate from the unknown.
5. It is the method of choice when the instrument response or amount of sample analyzed varies from run to run.
6. It is used to meure the instrument responses a function of a known analyte concentration under a set of conditions.
A. Standard addition
B. Internal standards
C. External standards