Question

Describe the physical effects and interferences that the method of standard additions would correct or compensate for in AAS.

Short answer

Two types of interference are spectral and nonspectral.

Step-by-step solution

Step 1. Given information

To describe the physical effects and interferences that the AAS approach of standard additions would mitigate or compensate for.

Step 2. Standard addition

Standard addition is a quantitative analysis procedure or technique used to reduce the effects of matrix interference in analyte measurement data.

Step 3.  Interference

Interference is a sort of phenomenon that causes fluctuations in the strength of analyte measurement signals in spectroscopy.

Step4. Physical effects and interferences 

Spectral interferences are generated by the existence of a molecule absorbance band or another line of atomic absorption very close to the spectral line of interest elements.

Non-spectral interferences occur when a sample has a different surface tension or is more viscous than the standard; this can result in changes in sample uptake rates as the effectiveness of nebulization fluctuates. These interferences can be reduced by matching the sample and standard matrix compositions as closely as possible.