Table T3. XRF analytical conditions for Leg 180.
Oxide or element | Line | Crystal | Detector | Collimator | Peak angle (° 2 ![]() |
Background offset (° 2 ![]() |
Count time (s) | Analytical error (relative %) |
Detection limit |
|
---|---|---|---|---|---|---|---|---|---|---|
Peak | Background | |||||||||
SiO2 |
K ![]() |
PET |
FPC |
Medium |
109.21 |
40 |
0.30 |
0.03 |
||
TiO2 |
K ![]() |
LIF200 |
FPC |
Fine |
86.14 |
40 |
0.37 |
0.01 |
||
Al2O3 |
K ![]() |
PET |
FPC |
Medium |
145.12 |
100 |
0.40 |
0.01 |
||
Fe2O3 |
K ![]() |
LIF200 |
FPC |
Fine |
57.52 |
40 |
0.20 |
0.01 |
||
MnO |
K ![]() |
LIF200 |
FPC |
Fine |
62.97 |
100 |
0.10 |
0.005 |
||
MgO |
K ![]() |
TLAP |
FPC |
Medium |
45.17 |
±0.80 |
150 |
150 |
0.60 |
0.01 |
CaO |
K ![]() |
LIF200 |
FPC |
Medium |
113.09 |
40 |
0.30 |
0.005 |
||
Na2O |
K ![]() |
TLAP |
FPC |
Medium |
54.10 |
-1.20 |
150 |
150 |
3.8 |
0.03 |
K2O |
K ![]() |
LIF200 |
FPC |
Medium |
136.69 |
100 |
0.40 |
0.01 |
||
P2O5 |
K ![]() |
GE111 |
FPC |
Medium |
141.04 |
100 |
0.40 |
0.01 |
||
Rh |
K ![]() |
LIF200 |
Scint |
Fine |
18.58 |
60 |
||||
Nb |
K ![]() |
LIF200 |
Scint |
Fine |
21.40 |
+0.35 |
200 |
100 |
0.2 |
0.5 |
Zr |
K ![]() |
LIF200 |
Scint |
Fine |
22.55 |
-0.35 |
100 |
50 |
0.5 |
0.6 |
Y |
K ![]() |
LIF200 |
Scint |
Fine |
23.80 |
-0.40 |
100 |
50 |
1.0 |
0.6 |
Sr |
K ![]() |
LIF200 |
Scint |
Fine |
25.15 |
-0.40 |
100 |
50 |
0.3 |
0.6 |
Rb |
K ![]() |
LIF200 |
Scint |
Fine |
26.62 |
-0.60 |
100 |
50 |
3.6 |
0.6 |
Zn |
K ![]() |
LIF200 |
Scint |
Medium |
41.81 |
-0.55 |
100 |
50 |
1.0 |
1.0 |
Cu |
K ![]() |
LIF200 |
Scint |
Fine |
45.03 |
-0.55 |
100 |
50 |
1.5 |
1.2 |
Ni |
K ![]() |
LIF200 |
Scint |
Medium |
48.67 |
-0.60 |
100 |
50 |
0.6 |
1.2 |
Cr |
K ![]() |
LIF200 |
FPC |
Fine |
69.35 |
-0.50 |
100 |
50 |
1.3 |
2.0 |
V |
K ![]() |
LIF220 |
FPC |
Fine |
123.06 |
-0.50 |
100 |
50 |
2.0 |
3.0 |
Ti |
K ![]() |
LIF200 |
FPC |
Fine |
86.14 |
+0.50 |
40 |
20 |
||
Ce |
L ![]() |
LIF220 |
FPC |
Medium |
128.13 |
-1.50 |
100 |
50 |
||
Ba |
Lß |
LIF220 |
FPC |
Medium |
128.78 |
-1.50 |
100 |
50 |
Notes: All major elements were measured using a rhodium X-ray tube operated at 30 kV and 80 mA. Trace elements were measured using a rhodium X-ray tube operated at 60 kV and 50 mA. Detector: FPC = flow proportional counter (P10 gas); Scint = NaI scintillation counter.