essarily a total concentration, the XRF values may
background concentrations present in the soil ma-
not be incorrect.
trix and for spectral overlap interferences. These
The concentration estimates for Cu, Zn, As, Pb,
corrections were made when both the subsample
Cr, Co, Ni, Hg, Tl, Se, Ag, Cd, Sn, Sb, and Ba in the
in the treatment set (Table 5) with no spiked analyte
laboratory-spiked soil subsamples appear in Tables
and the subsample of the untreated matrix were
10 through 15. Tables 1012 show the values for
determined to have concentrations that exceeded
RF/Comp. Kα normalization analysis, and Tables
the respective estimates of detection listed in Table
1315 show the values for FP analysis using the
6. However, in cases where there was no estimate
Spectrace 9000 XRF analyzer. In addition to these
of detection for the RF/Comp. Kα normalization
metals that were spiked onto the soils, values for
method of analysis, the lowest value appearing in
iron (Fe) determined by FP analysis are reported
this table was used. Corrections for Cu, Zn, and
in Table 14. Thallium was not determined by FP
Ba were necessary because these metals were
analysis because this metal had not been included
present at detectable levels in some of the soil
in the software program. All of these concentra-
matrices. Corrections were required for Co because
tion estimates were established by using either Cd-
of a spectral overlap with the Kβ peak of Fe and
109 or Am-241 incident radiation (Table 1).
for Ag due to spectral overlap with a peak charac-
The values in these tables were corrected for
teristic of the Am-241 primary radiation source.
Table 7. Analysis of commercial reference materials from
Table 8. Analysis of commercial reference materials
the National Institute of Standards and Technology.
from the Resource Technology Corporation.
Metal concentrations (g/g)
Metal concentrations (g/g)
Standard
Cu
Zn
As
Pb
Standard
Cu
Zn
As
Pb
SRM 1645
109**
1720**
714**
CRM012
3015**
635**
120**
river sediment
[72]
[1900]
[638]
incinerated
[2470]
[342]
[114]
3590†
744†
126†
114*
1760*
606*
sludge
3340*
525*
60*
SRM 1646
138**
estuarine sediment
[127]
CRM 013
643**
paint chips
[460]
SRM 1579a
119,950**
2160†
lead-based paint
[160,000]
998*
144,000†
124,000*
CRM 014
1914**
baghouse dust
[2080]
SRM 2704
99**
438**
161**
5360t
river sediment
[31]
[302]
[130]
4925*
ND†
464†
133†
527*
200*
CRM 020 soil
753**
3021**
397**
5195**
[687]
[4420]
[429]
[5070]
SRM 2709 soil
106**
521†
3550†
113†
4580†
[91]
684*
3898*
126*
4950*
129†
CRM 021 soil
5086**
574**
SRM 2710 soil
2950**
6952**
626**
5532**
[8720]
[549]
3350†
7570†
149†
6240†
3060†
408†
** Certified concentration
SRM 2711 soil
114**
350**
105**
1162**
[ ] Concentration estimate based on response factor/
[167]
[343]
[138]
[1100]
ND†
410†
ND†
1280†
Compton Kα peak normalization with X-Met 920
† Concentration estimate based on fundamental param-
414*
1210*
eter analysis with Spectrace 9000
** Certified concentration
* Concentration estimate based on fundamental param-
[ ] Concentration estimate based on response factor/
eter analysis with X-Met 920
Compton Kα peak normalization with X-Met 920
ND Not detected
† Concentration estimate based on fundamental param-
eter analysis with Spectrace 9000
* Concentration estimate based on fundamental param-
eter analysis with X-Met 920
ND Not detected
6
Previous Page
