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Last update: 2010-02-01

XRF Analysis of Oxides 
Overview of Samples

Testing of UniQuant in its standardless mode, that is,
NO SAMPLES SPECIFIC STANDARDS WERE USED
Slag S2 Slag (pressed powder)
NIM L SARM 3 Geo (pressed powder)
NBS 620 Geo (pressed powder)
ARL 200-E

7%PbO (glass)

MRG-1(part1) Geo (pressed powder)
MRG-1(part2) 

 
Geo (pressed powder)

GBW 7310(part1) Stream Sediment (powder)
GBW 7310(part2) Stream Sediment (powder)



Slag S2 (pressed powder)

UniQuant in its standardless mode, that is,
no sample specific standards were used.

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Fifteen laboratories
        [%]     EstErr       Min.    Average  Max.

CaO     44.86   0.29         44.46   44.74   44.98
Fe2O3   27.02    0.12        27.10   27.41   27.77
P2O5     9.02    0.14         8.96    9.17    9.37
SiO2     6.47    0.04         6.27    6.38    6.59
MgO      5.81    0.14         5.11    5.29    5.65

MnO      4.54    0.06         4.56    4.67    4.96

V2O5     0.90    0.06         0.96    0.99    1.00
Al2O3    0.67    0.04         0.62    0.70    0.73
TiO2     0.18    0.02         0.18    0.19    0.19
S        0.15    0.01         0.13    0.14    0.18


Cr2O3    0.064   0.005        0.074   0.079   0.087
Na2O     0.035   0.008        0.019   0.029   0.040
K2O      0.0069  0.0010       0.0043  0.0059  0.0074
F       <0.2                         (0.1)

Additionally by UniQuant:
SrO      0.020   0.001
CeO2     0.014   0.005
La2O3    0.014   0.003
BaO      0.011   0.005
Cl       0.011   0.001
Re2O7    0.006   0.003
Ga2O3    0.004   0.001
Y2O3     0.004   0.001
Nb2O5    0.0033  0.0008

W        0.043   0.003 (due to grinding in Tungsten
Co       0.014   0.002 Carbide vessel?)

Overview



NIM L SARM 3 (pressed powder)

UniQuant in its standardless mode, that is,
no sample specific standards were used.

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Fifteen laboratories
        [%]     EstErr       Min.    Average  Max.

SiO2    49.81    0.09        49.83   50.47   51.26
Al2O3   16.04    0.17        16.04   16.27   16.65
Fe2O3    9.07    0.08         9.02    9.23    9.37
Na2O     7.99    0.08         7.55    7.76    8.36
K2O      5.88    0.04         5.49    5.65    5.92

CaO      3.36    0.10         3.36    3.47    3.51
ZrO2     1.75    0.07         1.66    1.72    1.93
F        0.81    0.10         0.34    0.48    0.72
MnO      0.74    0.03         0.74    0.76    0.80
SrO      0.58    0.06         0.60    0.62    0.67

TiO2     0.44    0.02         0.46    0.47    0.49
MgO      0.24    0.03         0.14    0.21    0.24
Nb2O5    0.16    0.01         0.15    0.16    0.18
Cl       0.15    0.02         0.15    0.16    0.17


Additionally found by XRF+Uniquant:
Re2O7    0.019   0.001 
S        0.072   0.002 
P2O5     0.057   0.002 
ZnO      0.040   0.002 
SeO2     0.034   0.002

CeO2     0.032   0.003 
La2O3    0.029   0.003 
As2O3    0.024   0.002 
HfO2     0.022   0.003
Rb2O     0.019   0.001

V2O5     0.013   0.001
Co2O3    0.007   0.001
PbO      0.007   0.001
Ga2O3    0.007   0.001
Y2O3     0.003   0.001

CuO      0.002   0.001


Overview



NBS 620 (pressed powder)

UniQuant in its standardless mode, that is,
no sample specific standards were used.

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Fifteen laboratories
        [%]     EstErr       Min.    Average  Max.

SiO2    73.33    0.08        73.15   73.70   73.91
Na2O    13.09    0.10        12.35   12.56   13.30
CaO      6.90    0.15         7.01    7.17    7.24
MgO      4.00    0.12         3.63    3.78    4.06
Al2O3    1.91    0.06         1.85    1.95    2.04

K2O      0.36    0.01         0.35    0.37    0.39
SO3      0.22    0.02         0.23    0.26    0.34
As2O3    0.067   0.002        0.065   0.068   0.072
Fe2O3    0.038   0.001        0.037   0.039   0.041
TiO2     0.015   0.001        0.016   0.017   0.019

additionally found by XRF+Uniquant
SrO      0.034   0.001
ZrO2     0.028   0.001
Cl       0.007   0.001
P2O5     0.005   0.001
Re2O7    0.005   0.001
MnO      0.0023  0.0005
SeO2     0.0013  0.0004

CeO      0.0069  0.0017

Overview



ARL 200-E (glass)

UniQuant in its standardless mode, that is,
no sample specific standards were used.

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Two laboratories
        [%]     EstErr       Min.    Average  Max.

SiO2    61.57    0.09        60.12   60.58   61.03
Na2O    17.60    0.12        17.52   17.87   18.22
PbO      7.22    0.10         6.88    7.17    7.46
Al2O3    4.61    0.10         4.65    4.69    4.73
ZnO      3.98    0.03         3.62    3.72    3.81

F        1.90    0.12         2.18    2.76    3.35
CaO      0.89    0.05         0.89    0.91    0.92
BaO      0.84    0.04         0.74    0.81    0.88
K2O      0.63    0.01         0.64    0.65    0.66
Sb2O3    0.47    0.04         0.44    0.46    0.48

SO3      0.105   0.02         0.11    0.17    0.23
ZrO3     0.085   0.003        0.078   0.082   0.088
TiO2     0.056   0.002        0.053   0.056   0.058
Fe2O3    0.026   0.002        0.025   0.026   0.026
P2O5    <0.0030               0.0025  0.0027  0.029

MgO      0.013   0.003

W        0.006   0.002  (due to grinding in Tungsten
Co       0.003   0.001   Carbide vessel?)


Overview



MRG-1 (pressed powder)

UniQuant in its standardless mode, that is,
no sample specific standards were used.


PART 1, Trace elements

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Certified
        [%]     EstErr       values [%,]

SiO2    38.97    0.09         39.32
Al2O3    9.75    0.14          8.50
Fe2O3   15.29    0.10          8.26
                             + 8.63 FeO
MgO     14.03    0.21         13.49
CaO     13.96    0.20         14.77

Na2O     0.74    0.03          0.71
K2O      0.17    0.01          0.18
TiO2     3.48    0.05          3.69
P2O5     0.07    0.01          0.06
F       <0.06                  0.025

S        0.05    0.01          0.06
MnO      0.15    0.01          0.17


Overview



MRG-1 (pressed powder)

UniQuant in its standardless mode, that is,
no sample specific standards were used.


PART 2, Trace elements

Standard treated as unknown
All values are in [%]
        Specified      XRF + UniQuant4
        mg/kg          mg/kg   StdErr  Sigma   Eq.Bg

Cl      (150)          198      3      2.1     53
Co        86           134     11      1.8    134
Cr       450           424      4      2.3     43
Cu       135           122      3      1.6     52
La       (10)           78     11      3.6    216
Nb       (20)           20      3      0.7     52
Ni       195           163      4      1.9     83
Pb        10            11      5      1.8     96
Sc       (48)           38      5      1.3     79
Sr       260           249      4      1.4     43
V        520           516      8      2.4     46
Y        (16)           16      3      0.7     54
Zn       190           170      3      1.8     51
Zr       105           107      3      0.9     50

Sigma = represents counting error

Eq.Bg  = Equivalent Background in mg/kg

StdErr = the largest of two values, namely Sigma 
               and 0.05.Eq.Bg plus 0.10.Equiv. line 
               overlaps (not specified here).

Overview



GBW 7310, Stream Sediment as pressed powder

UniQuant in its standardless mode, that is,
no sample specific standards were used.


PART 1, Majors and Minors

Standard treated as unknown
All values are in [%]
        XRF+UniQuant4        Certified values
        [%]     EstErr       [%,]      ±

SiO2    74.78    0.08        76.25    0.10
Al2O3   11.98    0.15        10.37    0.05
Fe2O3    3.99    0.05         4.39    0.04
MgO      0.71    0.05         0.62    0.03
CaO      0.42    0.04         0.47    0.01

Na2O     0.74    0.03         0.46    0.01
K2O      3.42    0.03         3.28    0.03


Major elements in geo-samples suffer from ‘mineralogical effects’ when analysed
as powder by XRF. Hence, for accurate analysis, the sample would be normally
fused with a flux to form a homogeneous bead.

Overview



GBW 7310, Stream Sediment as pressed powder

UniQuant in its standardless mode, that is,
no sample specific standards were used.


PART 2, Trace elements

Standard treated as unknown
All values are in [%]
        XRF+UQ4        Certified               XRF+UQ4        Certified
        ppm   StdErr   ppm     ±               ppm   StdErr   ppm     ±
        ------------   -----------             ------------   ------------
As      174     8      188     6       S       180     8      170    20
Ba      184    51      260     8       Sb      <15             14.9   0.7
Bi       42     3       50     2       Sc        4.6   3        7.4   0.2
Ce       68     9       58     2       Se       <3              0.2   0.03
Cl      362     6      290    17       Sn      294    11      370    29

Co       22     4        8.5   0.3     Sr       23     3       29     1.4
Cr       32     2       40     1       Ta      <11              5.7   0.3
Cu       84     2       79     1       Te      <36              0.4     
F      1790   300     1650    49       Ti     1920    80     2100    40
Ga       17     1       18.5   0.6     V        49     2       46.8   1.2

Ge        1.6   1.1      1.81  0.13    W       107     6      126     4
Hf       <9              5.4   0.3     Y        39    12       42.7   2.1
In      <16              1.9   0.2     Zn      361     2      373     6
La       18    13       30     1       Zr      152     3      153     6
Mn     2220   120     2490    33      

Mo        8     3        5.9   0.3     XRF Analysis of Traces of 
Nb       26     3       25     1       Lanthanides (not shown)
P       273     3      255    13       would require a
Pb      577     6      636    10       pre-concentration of the
Rb      394     4      408     6       sample.


Overview


 
   


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