Table 13. Concentrations (g/g) of Cr, Cu, Zn, As, and Pb determined by fundamental parameter analysis using the Spectrace 9000

Table 13. Concentrations (g/g) of Cr, Cu, Zn, As, and

Table 14. Concentrations (g/g) of Co, Ni, Hg, Se, and Fe

Pb determined by fundamental parameter analysis

determined by fundamental parameter analysis using

using the Spectrace 9000.

the Spectrace 9000.

Metal concentrations (g/g)

Rocky Mountain Arsenal

Lebanon landfill soil

* Average of 0 ppm and matrix subsamples subtracted

is the depth of penetration achieved by the inci-

ranges from 40 mm for Am-241 to 4.8 mm for Cd-

dent radiation, i.e., how much of the sample is ac-

109. The combination of these factors controls the

tually analyzed. The penetration depth of incident

intensity that will be measured for a given element.

radiation is inversely proportional to its wave-

For example, Table 6 shows the range of analyte

length and directly proportional to its energy. For

intensities obtained for the same concentration in

the sources used in this study, the depth of pen-

the RMA soil.

etration (99% attenuation) for a quartz matrix

To illustrate the combination of these two ef-

10