ELEMENTAL SENSITIVITY METHOD

The elemental sensitivity method is based on the following expressions

	(1)
	(2)

where N - is the number of elements in the sample, k - summing index, j - index of the element of interest. Finding the ration of IL intensities by means of (7.2.2) and substituting it into (2) yields

(3)

assuming the knowledge of elemental sensitivity coefficients Sj, EBE factors and the IL intensities Ij.

(4)

It was also assumed that and and also that transmission functions are not very much different while measuring the sample and the elemental standard. In this case the elemental sensitivity coefficients Sj are determined by physical parameters and are independent on instrumental factors. After accumulation of reference data it is reasonable to select one element, for example silicon, and transfer to the elemental sensitivity factors relative to silicon

(5)

The values of Sj are given on the corresonding pages of the Handbook.