Question

The standard addition method is used when a. the sample matrix is very complicated b. something...

The standard addition method is used when

a. the sample matrix is very complicated

b. something in the sample interferes with the analysis of the analyte

c. the instrument is unstable over time

d. the detection limit for the analyte is too high

The answer is B, please explain why and why other answers are wrong!

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

The method of standard additions is a quantitative analysis method, which is often used when the sample of interest has multiple components that result in matrix effects, where the additional components may either reduce or enhance the analyte absorbance signal i.e when something in the sample interferes the analysis.

That results in significant errors in the analysis results of the analyte.

Iin this method, the remaining options are not giving the sense of definition or method and they are not the MAIN PURPOSE to use these methods hence, the B) is more appropritae.

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