Chapter 21: Q13P (page 556)

Explain what is meant by spectral, chemical, ionization, and isobaric interference.

Short Answer

Expert verified

When analyte signals collide with signals from other elements in the sample, then the spectral interference happens. When a component of the sample lowers the amount of analyte atomization, then the chemical interference happens. The loss of analyte atoms due to ionisation is referred to as ionisation interference. Isobaric interference is caused by the presence of equivalent mass isotopes of multiple elements.

Step by step solution

Define interference.

A substance other than the tested material that can be analysed by the chosen analytical method or can prevent the assayed material from being measured is referred to as an interference. Interferences lead to inaccurate analytical results

Define spectral and chemical interference.

Spectral interference occurs when analyte signals collide with signals from other elements or molecules in the sample, as well as signals from the flame or furnace.

Chemical interference occurs when a component of the sample, through a chemical reaction, lowers the amount of analyte atomization.

Define ionization and isobaric interference.

The loss of analyte atoms due to ionisation is referred to as ionisation interference. The ionisation energy of Ba, for example, is smaller than the dissociation energy of BaO.

Isobaric interference is caused by the presence of equivalent mass isotopes of multiple elements in the sample solution.