Question

what are matrix effects and how would they influence ICP results?

Answer 1

Matrix effects—changes in analyte sensitivity induced by a high concentration of matrix elements.

Matrix effect is an effect on an analytical method caused by all other component of the sample except the specific compound to be quantified. In ICP the matrix effect or non spectroscopic interference can be defined as the type of intereference caused by dissolved concomitant salt ions in the solution. Matrix effects can be divided into two categories: 1) signal drift due to the deposition of solids on the sampling apertures; and/or 2) signal suppression or enhancement by the presence of the dissolved salts.

High concentrations of matrix elements cause signal reduction, poor precision, and even memory effects.

Matrix effect can reduce accuracy too.