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Round robin tests XRF-analysis XRF Round-robin test GeoPT30A, England - ML-2, Impure Limestone

Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT30A
Material of proficiency test:
ML-2, (Impure Limestone)
Study finished:
2012 - 2
Literature:
Report - GeoPT30A Proficiency Testing Round

major elements [wt %]

CRBRV1sRVZ-Score
MgO1,3601,3900,026-0,520
Al₂O₃0,4300,4500,010-0,790
SiO₂2,7902,8600,050-0,750
P₂O50,0450,047-0,660 
K₂O0,0100,0110,003-1,120
CaO52,83052,5000,5780,290
TiO₂*0,0200,021------ 
Fe₂O₃ tot0,1200,1400,004-2,660
MnO0,0160,0230,001-4,130
L.O.I.*42,13041,8900,4780,250

trace elements [µg/g]

CRBRV1sRVZ-Score
Ba57,0028,001,4010,80
Ce1,802,700,20-2,50
Cr12,006,200,90---
F*430,00469,00------ 
Ga0,900,600,101,71
Hf*1,101,10------ 
Ni*7,007,70------ 
Sr1023,001032,0010,20-0,15
S*44,0059,00------ 
V7,003,000,209,00
Y4,002,100,20---
Zn*3,005,30------

Legend

CRB
results CRB
cooperative test
results collaborative study
1s-RV
Standard deviation collaborative study
Z-Score
Difference of measured value from mean study
*
Value not certified

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