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Round robin tests XRF-analysis XRF Round-robin test GeoPT 40A, England - ShTX-1, Calcearous organic-rich shale

Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT40A
Material of proficiency test:
ShTX-1, Calcearous organic-rich shale
Study finished:
2017 - 2
Literature:
Report - GeoPT40A Proficiency Testing Round 40A (Laborcode CRB = X25)

major elements [wt %]

CRBRV1sRVZ-Score
MgO0,5500,4200,0106,730
Al₂O₃3,9604,0000,065-0,310
SiO₂25,00025,1300,309-0,210
P₂O50,0990,0990,0030,000
K₂O0,3300,3370,008-0,440
CaO33,05032,9500,3890,130
TiO₂0,1800,1750,0050,530
Fe₂O₃tot1,6201,6120,0300,130
MnO0,0130,0110,0011,940
L.O.I.31,54031,6100,380-0,110
TC11,92011,9100,1640,030
TOC*5,3304,9500,580

trace elements [µg/g]

CRBRV1sRVZ-Score
As15,0015,100,800,03
Ba59,0073,003,10-2,28
Ce31,0024,801,202,56
Cl *130,0094,0041,00
Cr25,0029,701,40-1,63
Cu33,0033,801,60-0,26
F *550,00606,00162,00
Ga8,006,300,402,26
Hf2,001,180,104,45
Nd11,0011,000,600,00
Ni72,0074,903,10-0,47
Pb10,006,100,405,35
Rb12,0016,900,90-2,77
Sr1042,001017,0028,700,44
V421,00419,0013,500,07
Y10,009,600,500,37
Zn97,0097,803,90-0,10
Zr61,0052,602,301,82

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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